Monday, 3 October, 1994 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Sigund Assing (Jena) 
One dimensional stochastic differentieal equations 

Tuesday, 4 October, 1994 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
René Schilling (Erlangen) 
On a class of Markov processes comparable with Levy processes 

Friday, 7 October, 1994 
1:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
O.G. Smolianov (Moscow) 
Givsanov Marayama theorems 

Friday, 7 October, 1994 
2:30 pm 
Room 2 
Stochastic Analysis & Related Topics 
John Jones (Warwick) 
Geometry of loop spaces I 

Friday, 7 October, 1994 
4:00 pm 
Room 2 

E.P. Hsu (Northwestern) 
A stochastic local Gauss BonnetChern theorem 

Monday, 10 October, 1994 
3:00 pm 
Room 1 
Nonlinear Systems Laboratory Seminar 
W.A.B. Evans (Kent) 
Integral equation approach to large amplitude solitary waves 

Tuesday, 11 October, 1994 
4:00 pm 
Room 2 
Stochastic Analysis Seminar 
Y. Gliklikh (Voronezh) 
Existence Theorems in ordinary and relativistic stochastic mechanics 

Thursday, 13 October, 1994 
3:15 am 
Room 1 
COW (Cambridge/Oxford/Warwick alg. geometry seminar) 
Miles Reid (Warwick) 
McKay for SL(3,Ç) 

Thursday, 13 October, 1994 
4:00 pm 
Room 2 
Hyperbolic Geometry Seminar 
Al Marden (Minnesota/Warwick) 
Projective structures on Riemann surfaces: an exposition 

Thursday, 13 October, 1994 
4:30 pm 
Room 1 
COW (Cambridge, Oxford & Warwick alg. geometry seminar) 
Gregory Sankaran (Cambridge) 
Moduli of Abelian Surfaces with (1, p^2) polarisation 

Friday, 14 October, 1994 
1:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
Shigeki Aida (Tôhoku) 
On the differential operators on submanifolds in Wiener spaces 

Friday, 14 October, 1994 
4:00 pm 
Room 2 
Stochastic Analysis Seminar 
Remi Leandre (NANCY) 
The circle as a Fermionic Current 

Monday, 17 October, 1994 
3:00 pm 
Room 1 
Nonlinear Systems Seminar 
Dwight Barkley (Warwick) 
Floquet stability of hydrodynamics flows 

Tuesday, 18 October, 1994 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
Matt Nicol (Warwick) 
Stochastic stability of toral linked twist maps (Part I) 

Tuesday, 18 October, 1994 
4:00 pm 
Room 2 
Stochastic Analysis Seminar 
Xuemei Li (Warwick) 
More heat kernel derivative estimates 

Wednesday, 19 October, 1994 
2:30 pm 
Room S284 
Midland probability seminar (in Statistics Dept.) 
Roger Tribe (Warwick) 
A stationary wave font solution to a stochastic p.d.e. 

Wednesday, 19 October, 1994 
4:00 pm 
Room S284 
Midland probability seminar (in Statistics Dept.) 
J.Q. Smith (Warwick) 
Simple Spatiotemporal processes in a complex enviroment: Modelling and computational issues 

Thursday, 20 October, 1994 
4:15 am 
Room 2 
Hyperbolic Geometry Seminar 
Caroline Series (Warwick) 
Bending formulae for convex hull boundaries 

Friday, 21 October, 1994 
1:15 pm 
Room 2 
Stochastic Analysis Seminar 
James Norris (Cambridge) 
Twisted sheets part I (2parameter stochastic calculus) 

Friday, 21 October, 1994 
4:00 pm 
Room 2 

F.A. Rogers (Kings) 
Fermionic path integrals 

Monday, 24 October, 1994 
3:00 pm 
Room 1 
Nonlinear Systems Laboratory 
Lenny Smith (Oxford) 
Probabilistic Forecasts from Deterministic Predictions: Ensembles, Uncertainties and Chaos in Natural Systems. 

Tuesday, 25 October, 1994 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
Matt Nicol (Warwick) 
Stochastic Stability of toral linked twist maps (Part II) 

Tuesday, 25 October, 1994 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
ZhiMing Ma (Beijing/Warwick) 
Quasisure analysis and Itô's Wiener space 

Thursday, 27 October, 1994 
2:00 pm 
Room 1 
Algebra Seminar 
Robert Marsh (Warwick) 
Representations of Simple Lie Algebras  new light on a classical theory, Part II 

Thursday, 27 October, 1994 
3:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Ignacio Bosch Vivancos (INLN, Nice) 
Tranverse Bifurcation of Homoclinic Cycles and the Magnetic Dynamo Effect 

Friday, 28 October, 1994 
1:15 pm 
Room 1 
Stochastic Analysis & Related Topics 
James Norris (Cambridge) 
Twisted sheets part II (2parameter stochastic differential equations) 

Friday, 28 October, 1994 
2:30 pm 
Room 2 
Stochastic Analysis & Related Topics 
John Jones (Warwick) 
Geometry of loop spaces II 

Friday, 28 October, 1994 
4:00 pm 
Room 2 
Colloquium 
Keith Hoskin (SIBS, Warwick) 
Textbooks, pedagogy and the genisis of modern mathematics 

Tuesday, 1 November, 1994 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
Richard Sharp (Oxford) 
Surface groups, Rtrees and the Euler characteristic 

Thursday, 3 November, 1994 
2:00 pm 
Room 1 
Algerbra Seminar 
A. Kleshchev (Minsk) 
Branching rules for modular representations of symmetric groups and a problem of Mullineux. 

Friday, 4 November, 1994 
1:15 pm 
Room 1 
Stochastic Analysis & Related Topics 
James Norris (Cambridge) 
Twisted sheets as diffusions in path space 

Friday, 4 November, 1994 
2:30 pm 
Room 2 
Stochastic Analysis & Related Topics 
John Jones (Warwick) 
Geometry of loop spaces VI 

Friday, 4 November, 1994 
4:00 pm 
Room 1 
Stochastic Analysis & Related Topics 
Alice Rodgers (Kings, London) 
Supersymmetric path integration 

Friday, 4 November, 1994 
4:00 pm 
Room 2 
Colloquium 
Micheal Monastyrsky (Moscow) 
Topology in Condensed Matterin Field Theory 

Monday, 7 November, 1994 
3:00 pm 
Room 1 
Nonlinear Systems Laboratory Seminar 
Jerry Huke (DRA, Malvern) 
Cancelling Deterministic Noise 

Tuesday, 8 November, 1994 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
S. Luzzatto (Trieste) 
Positive Lyapunov exponents for a family of Lorenzlike maps. 

Thursday, 10 November, 1994 
2:00 pm 
Room 1 
Algebra Seminar 
Ross Lawther (Warwick) 
A1Type subgroups of exceptional algebraic groups 

Thursday, 10 November, 1994 
4:15 pm 
Room 2 
Hyperbolic Geometry Seminar 
Brian Bowditch (Southampton) 
Markoff triples 

Monday, 14 November, 1994 
3:00 pm 
Room 1 
Nonlinear Systems Laboratory Seminars 
Bjoern Sandstede (WIAS, Berlin) 
Forced symmetry breaking of heteroclinic cycles 

Tuesday, 15 November, 1994 
3:05 am 
Room Quiet Room 
Stochastic Analysis & Related Topics 
D. Bakry (Toulouse) 
Correlation inequalities for spin systems 

Tuesday, 15 November, 1994 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
Thomas Ward (East Anglia) 
Examples of higher order for Z2 actions 

Tuesday, 15 November, 1994 
2:00 pm 
Room 1 
Topology Seminar 
Colin Rourke (Warwick) 
Cassen's Obstruction to geometric proofs 

Tuesday, 15 November, 1994 
4:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
V. Kolmanovskii (Moscow) 
Periodic measures generated by the solutions of P.D.E.'s. 

Thursday, 17 November, 1994 
4:15 am 
Room 2 
Hyperbolic Geometry Seminar 
Murray Macbeath (Warwick) 
The modular group crops everywhere 

Thursday, 17 November, 1994 
4:00 pm 
Room 1 
Stochastic Analysis & Related Topics 
D. Bakry (Toulouse) 
Topics in the analysis of Markov semigroups I 

Friday, 18 November, 1994 
1:15 pm 
Room 1 
Stochastic Analysis & Related Topics 
R. Leandre (Nancy) 
Stochastic Moore Loops 

Friday, 18 November, 1994 
2:30 pm 
Room 2 
Stochastic Analysis & Related Topics 
John Jones (Warwick) 
Geometry of Loop spaces V 

Tuesday, 22 November, 1994 
12:00 am 
Room 2 
Nonlinear Systems Laboratory Seminar 
Xio Xin Liao (Huazhong) 
Qualitative analysis of neural nets 

Tuesday, 22 November, 1994 
2:00 pm 
Room 1 
Topology Seminar 
Paul Norbury (Warwick) 
Hyperbolic Monopoles and the Loop Group 

Tuesday, 22 November, 1994 
3:00 pm 
Room Quiet Room 
Nonlinear Systems Laboratory Seminar 
Andy Osbaldestin (Loughborough) 
Renormalisation of Siegal discs. 

Tuesday, 22 November, 1994 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
W. Stummer (Bath) 
On multidimensional diffusion processes with singular drift: Examples, Existence and Entropy 

Thursday, 24 November, 1994 
2:00 pm 
Room 1 
Algebra Seminar 
Sarah Whitehouse (Warwick) 
Some remarks on Commutative Algebra Homology in Prime Characteristics 

Thursday, 24 November, 1994 
4:00 pm 
Room 1 
Stochastic Analysis & Related Topics 
D. Bakry (Toulouse) 
Topics in the analysis of Markov semigroups II 

Friday, 25 November, 1994 
1:15 pm 
Room 1 
Stochastic Analysis & Related Topics 
Gunnar Peters (Uppasala) 
T.B.A. 

Friday, 25 November, 1994 
2:30 pm 
Room 2 
Stochastic Analysis & Related Topics 
John Jones (Warwick) 
Geometry of loop spaces VI 

Friday, 25 November, 1994 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
J. van Biessen (Antwerpe) 
Ricci Curvature for certain submanifolds of Wiener space 

Monday, 28 November, 1994 
3:00 pm 
Room 1 
Nonlinear Systems Laboratory Seminars 
Adam Kowalewski (Cracow/Warwick) 
Optimal Control of Parabolic Systems with TimeVarying Lags 

Monday, 28 November, 1994 
4:30 pm 
Room 2 
Geometric Groups Seminar 
Shin Nayatani (Tohoku & MPI, Bonn) 
Limit Sets of Kleinian Groups and Conformal Geometry 

Tuesday, 29 November, 1994 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
R. Hill (London) 
Diophantine approximation in dynamical systems 

Tuesday, 29 November, 1994 
2:00 pm 
Room 1 
Topolgy Seminar 
Alan Robinson (Warwick) 
Topological variants of algebraic homology theories 

Tuesday, 29 November, 1994 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
S. Aida (Tohuka) 
Logorithmic Sobolev inequalities under changing reference probability measures 

Thursday, 1 December, 1994 
2:00 pm 
Room 1 
Algebra Seminar 
Jeremy Rickard (Bristol) 
What could be simpler than the trivial module? 

Thursday, 1 December, 1994 
4:00 pm 
Room Quiet Room 
Stochastic Analysis & Related Topics 
D. Bakry (Toulouse) 
Analysis of Markov semigroups 

Friday, 2 December, 1994 
2:30 pm 
Room 2 
Stochastic Analysis & Related Topics 
John Jones (Warwick) 
Geometry of loop spaces VII 

Monday, 5 December, 1994 
3:00 pm 
Room 1 
Nonlinear Systems Laboratory Seminar 
Matt Nicol (Warwick) 
Detecting Symmetries of Attractors 

Tuesday, 6 December, 1994 
2:00 pm 
Room 1 
Topology Seminar 
Josef Przytycki (Berkeley) 
3colouring and other elementary invariants of knots 

Thursday, 8 December, 1994 
4:15 pm 
Room 2 
Hyperbolic Geometry Seminar 
Panos Papasoglu (Orsay) 
Quasiflats in semihyperbolic groups 

Friday, 9 December, 1994 
4:00 pm 
Room 2 
Algebra (Midlands University Colloquium) 
Peter Cameron (QMW) 
Cofinitary Permutation Groups 

Tuesday, 13 December, 1994 
2:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Richard Sowers (NorthWestern) 
On the interplay between homogenization and large deviations 

Tuesday, 13 December, 1994 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
S. Paycha (Strasbourg) 
Group actions on ∞dimensional manifolds, minimality of orbits, projections of 'Brownian motion'. 

Tuesday, 10 January, 1995 
4:00 pm 
Room CS 128 
History of Mathematics 
David Fowler (Warwick) 
Something old, something new 

Thursday, 12 January, 1995 
2:00 pm 
Room 1 
Algebra Seminar 
Richard Green (Warwick) 
Quotients of qSchur Algebras 

Thursday, 12 January, 1995 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
L. Flatto (Bells Lab.) 
Linear mod one transformations 

Friday, 13 January, 1995 
2:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Dan Strook (M.I.T.) 
Towards a Riemannian Geometry on the path space over a Riemannian manifold 

Monday, 16 January, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Igor Mezic (Warwick) 
Maximal effective diffusivity and nondiffusive dispersion in fluids. 

Wednesday, 18 January, 1995 
3:00 pm 
Room 1 
Ktheory Seminar 
Alan Robinson (Warwick) 
Algebraic Ktheory and topological homology I 

Thursday, 19 January, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Peter Baxendale (USC) 
Bifurcation theory for stochastic differential equations 

Friday, 20 January, 1995 
2:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Vladimiz Bogachev (Moscow) 
Invariant measures for diffusions in finite and infinitedimensional spaces. 

Tuesday, 24 January, 1995 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
S. Velani (Imperial College, London) 
Shrinking targets and Diophantine Approximations 

Tuesday, 24 January, 1995 
3:15 pm 
Room 1 
Ktheory Seminar 
Hans Munkholm (Odense University) 
Contolled Ktheory 

Thursday, 26 January, 1995 
2:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
V. Bogachev (Moscow) 
Connections between ordinary and stochastic differential equations 

Friday, 27 January, 1995 
2:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Dave Applebaum (Trent) 
Levy folds on manifolds 

Monday, 30 January, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Nigel Buroughs (Warwick) 
Losing sleep over kink collisions in perturbed SineGordon equations. 

Thursday, 2 February, 1995 
2:00 pm 
Room 2 
Algebra Seminar 
A.M. Macbeath (Warwick) 
Characteristic subgroups of finite index in the free group F2 

Thursday, 2 February, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Z. Qian (Imperial College) 
Rockner  Bakry's inequality and gradient estimate 

Friday, 3 February, 1995 
2:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Peter Baxendale (USC) 
Aspects of large deviation and stability for stochastic flows 

Friday, 3 February, 1995 
4:00 pm 
Room 2 
COLLOQUIUM 
Larry Markus (Warwick) 
Boundary value problems and symplectic geometry 

Monday, 6 February, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Thomas Hoefer (Oxford) 
Cellular pattern formation during Dictyostelium aggregation. 

Tuesday, 7 February, 1995 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
A. Quas (Cambridge) 
Non uniqueness of a.c.invariant measure for Cexpanding maps 

Thursday, 9 February, 1995 
2:00 pm 
Room 1 
Algebra Seminar 
A. Braun (Haifa) 
Zelmanov's solution to the restricted Burnside problem 

Thursday, 9 February, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
XueMei Li (Warwick) 
Solution flows for stochastic differential equations in noncompact manifolds 

Friday, 10 February, 1995 
2:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Z. Brezniak (Hull) 
Attractors for Stocastic p.d.e. 

Friday, 10 February, 1995 
4:00 pm 
Room 2 
COLLOQUIUM 
David Epstein (Warwick) 
Outside In 

Monday, 13 February, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Mark Roberts (Warwick) 
Symmetries of Riemann Ellipsoids 

Wednesday, 15 February, 1995 
3:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Alastair Spence (Bath) 
The detection of Hopf bifurcations in large systems using the argument principle. 

Thursday, 16 February, 1995 
2:00 pm 
Room 1 
Algebra Seminar 
G. Robinson (Leicester) 
Local Structure and Representation Theory 

Thursday, 16 February, 1995 
3:30 pm 
Room 2 

J. W. Milnor (Warwick) 
External rays of the Mandelbrot set 

Thursday, 16 February, 1995 
5:00 pm 
Room 1 
Stochastic Analysis and Related Topics 
J. F. Feng (Warwick) 
Hydrodynamic Limit for the Reaction Diffusion Equation . An approach in terms of GPV Method 

Friday, 17 February, 1995 
2:00 pm 
Room 2 
Stochastic Analysis and Related Topics 
R. Schilling (Erlangen/Warwick) 
Subordination in the sense of Bochner: an approach via √do's 

Friday, 17 February, 1995 
2:30 pm 
Room ELT 2 
Computers in Mathematics 
H. Cohen (Bordeaux) 
Computation in number fields 

Friday, 17 February, 1995 
3:50 pm 
Room ELT 2 
Computers in Mathematics 
J.E. Cremona (Exeter) 
Computations with modular elliptic curves 

Friday, 17 February, 1995 
5:00 pm 
Room ELT 2 
Computers in Mathematics 
J. Milnor (SUNY) 
Computation in holomorphic dynamics 

Saturday, 18 February, 1995 
12:10 am 
Room ELT 1 
Computers in Mathematics 
C. LeedhamGreen (QMW) 
Matrix groups over finite fields. 

Saturday, 18 February, 1995 
9:00 am 
Room ELT 1 
Computers in Mathematics 
D. Gabai (CalTech) 
On the rigidity of hyperbolic 3manifolds. 

Saturday, 18 February, 1995 
10:00 am 
Room ELT 1 
Computers in Mathematics 
N. Thurston (Berkeley) 
The search for all narrow 3manifolds. 

Saturday, 18 February, 1995 
11:10 am 
Room ELT 1 
Computers in Mathematics 
D.F. Holt (Warwick) 
Computing in group theory. 

Monday, 20 February, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Tony Davies (Kings College, London) 
Nonlinear overflow oscilliations from digital filters 

Thursday, 23 February, 1995 
2:00 pm 
Room 1 
Algebra Seminar 
J.S. Wilson (University of Birmingham) 
Finitely Presented Soluble Groups, Degenerate Spheres, and Integer Polynomials 

Thursday, 23 February, 1995 
4:00 pm 
Room 2 
Stochastic Analysis and Related Topics 
D. Elworthy (Warwick) 
Integration by parts formulae via stochastic flows 

Friday, 24 February, 1995 
2:00 pm 
Room 2 
Stochastic Analysis and Related Topics 
Bruce Driver (UCSD) 
A logarithmic Sobolev inequality for the pinned loop group 

Friday, 24 February, 1995 
4:00 pm 
Room 2 
COLLOQUIUM 
T. Lyons (Imperial College London) 
Differential equations driven by rough signals 

Monday, 27 February, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Anne Skeldon (Nottingham) 
Some new stability results for steady spatially doublyperiodic plan forms. 

Tuesday, 28 February, 1995 
2:00 pm 
Room 2 
Ergodic Theory Seminar 
S. Gaito (Warwick) 
Markov covers for subshifts 

Tuesday, 28 February, 1995 
3:15 pm 
Room 1 
Topology Seminar 
Dr. Victor Goryunov (Liverpool) 
Minimal Legendvian Framings of Knots 

Wednesday, 1 March, 1995 
3:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Jeroen Lamb (Warwick) 
ksymmetry in dynamical systems. 

Thursday, 2 March, 1995 
2:30 pm 
Room Quiet Room 
Stochastic Analysis and Related Topics 
J.F. Feng (Rome 1) 
Simulated Annealing 

Thursday, 2 March, 1995 
4:00 pm 
Room 2 
Stochastic Analysis and Related Topics 
I. Goldscheild (QMW) 
Lyapunov exponents of products of Symplectic Matrice 

Friday, 3 March, 1995 
2:00 pm 
Room 2 
Stochastic Analysis and Related Topics 
B. Driver (UCSD) 
Laganthmic Sobolev Inequalities in Loop Groups (II) 

Friday, 3 March, 1995 
4:00 pm 
Room 2 
COLLOQUIUM 
Peter Kronheimer (Oxford) 
New developments in 4manifolds 

Monday, 6 March, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Michele Bartuccelli (Surrey) 
Length Scales in solutions of the complex GinzburgLandau equation 

Thursday, 9 March, 1995 
2:00 pm 
Room MI2 
Topology Seminar 
Vladimir Nezhinskij (St. Petersburg) 
Singular Links and Homotopy Theory 

Friday, 10 March, 1995 
2:15 pm 
Room 2 
Stochastic Analysis and Related Topics 
H. Matsumato (Gifu) 
Spectral Analysis of Schrodinger Operators with Magnetic Fields 

Friday, 10 March, 1995 
4:00 pm 
Room 2 
COLLOQUIUM 
David Olive (Swansea) 
Electromagnetic Duality 

Monday, 13 March, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Nigel Stocks (Engineering,Warwick) 
Dynamical characterization of the spatiotemporal structure in the wake of the bluff body 

Thursday, 16 March, 1995 
2:00 pm 
Room 1 
Algebra Seminar 
A. Juhasz (Technion Haifa) 
On the Hyperbolicity and NonHyperbolicity of OneRelator Groups 

Thursday, 16 March, 1995 
4:00 pm 
Room 2 
Stochastic Analysis and Other Topics 
Y. LeJan (Orsay) 
Selfattracting diffusions 

Friday, 17 March, 1995 
2:15 pm 
Room 2 
S.A.R.T. 
Y. Hu (Oslo) 
Nonsmoothness of selfintersection local times of planar Brownian motion 

Friday, 17 March, 1995 
4:00 pm 
Room 2 
COLLOQUIUM 
Donna Testerman (Warwick) 
On principal SL2 subgroups of groups of Lie type 

Monday, 20 March, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
P. Ruffino (Warwick) 
Rotation numbers for Stochastic Dynamical systems 

Tuesday, 21 March, 1995 
2:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Y. Hu (Oslo) 
Stochastic Quantization of P(ƒ)2 field 

Tuesday, 21 March, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
H. Matsumotu (Gifu) 
Degenerate semi classical asymptotics of the eigenvalues for Schnedinger Operators with Magnetic Field 

Wednesday, 22 March, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
R. Cerf (Orsay) 
Genetic Algorithms and FreidlinWentzell 

Thursday, 23 March, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
R. Leandre (Nancy) 
Stochastic WeissZuminoWitten Model over Symplectic Manifolds 

Tuesday, 2 May, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
Nickita Ratanov (Cheliabinsk: LMS visitor) 
Stabilization of solutions of the wave equation with random coefficients 

Wednesday, 3 May, 1995 
3:00 pm 
Room Quiet Room 
Nonlinear Systems Laboratory Seminar 
John A.G. Roberts (Melbourne) 
Dynamical connections between trace maps, cat maps and 3D reversible maps 

Friday, 5 May, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
Moshe Zakai (Technion) 
The constitution of a time like structure on abstract Wiener space 

Monday, 8 May, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
Jim Eells (Cambridge) 
Harmonic maps into geodesic spaces 

Tuesday, 9 May, 1995 
4:00 pm 
Room 2 
Geometry & Groups Seminar 
Lawrence Reeves (Southampton) 
Central extensions of Hyperbolic groups are biautomatic 

Friday, 12 May, 1995 
4:00 pm 
Room 2 
COLLOQUIUM 
David Williams (Bath) 
T.B.A. 

Monday, 15 May, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
G.J Lord (Bristol) 
Inertial manifolds and finite difference approximations 

Monday, 15 May, 1995 
2:30 pm 
Room Quiet Room 
Stochastic Analysis & Related Topics 
E. MayerWolf (Technion) 
Flows in nonGaussian spaces 

Tuesday, 16 May, 1995 
2:00 pm 
Room 2 
Ergodic Theory & Dynamical Systems Seminar 
Anthony Manning (Warwick) 
Geometrical Markov partitions for some toral automorphisms 

Tuesday, 16 May, 1995 
4:00 pm 
Room 1 
Stochastic Analysis & Related Topics 
Astrid Hilbert (Bochum) 
Asymptotic behavior of stochastically perturbed Hamiltonian Systems 

Wednesday, 17 May, 1995 
4:00 pm 
Room 1 
Topology seminar 
Dale Rolfsen (Vancouver) 
Global Mutation 

Friday, 19 May, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
Naomasa Ueki (Himeji) 
Application of Mallianin calculus 

Monday, 22 May, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
J. Woodhouse (Cambridge) 
Modelling playing the violins 

Tuesday, 23 May, 1995 
4:00 pm 
Room 2 
Geometry & Groups Seminar 
Ian Chiswell (Q.M.W.) 
Protrees and LambdaTrees 

Tuesday, 23 May, 1995 
4:00 pm 
Room 1 
Stochastic Analysis & Related Topics 
K. Burdzy (Seattle) 
The parabolic Martin boundary 

Thursday, 25 May, 1995 
2:00 pm 
Room 2 
Algebra Seminar 
Ross Lawther (Warwick) 
Double cosets and clefs 

Thursday, 25 May, 1995 
2:00 pm 
Room 1 
Nonlinear Systems Laboratory Seminar 
Axel Brandenburg (Bohr Institute) 
Generalised dimensions and entropies in hydromagnetic convection 

Thursday, 25 May, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Peter Baxendale (University of Southern California) 
Geometric Ergodicity for Recurrent Markov Processes 

Friday, 26 May, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
H. Zhao (Swansea) 
The Stochastic HamiltonJacobi Equation and its Applications 

Tuesday, 30 May, 1995 
2:00 pm 
Room 2 
Ergodic Theory & Dynamical Systems 
Ross Jones (Cambridge) 
Markov surgery of polynomial maps 

Tuesday, 30 May, 1995 
4:00 pm 
Room 2 
Geometry and Groups Seminar 
Martin Bridson (Oxford) 
A Splitting Theorem for Nonpositively Curved Spaces 

Tuesday, 30 May, 1995 
4:00 pm 
Room 1 
Stochastc Analysis and Related Topics 
K. Burdzy (Seattle) 
The Parabolic Martin Boundary II 

Wednesday, 31 May, 1995 
2:30 pm 
Room SO.10 
Midlands Probability Theory Seminar (Social Studies) 
Dr. M. Perman (Cambridge) 
SizeBiased Sampling of Poisson Processes and Excursions 

Wednesday, 31 May, 1995 
3:00 pm 
Room Quiet Room 
Nonlinear Systems Laboratory Seminar 
Paul Glendinning (Cambridge) 
Rotational Cantor sets for unimodal maps 

Wednesday, 31 May, 1995 
4:00 pm 
Room SO.10 
Midlands Probability Theory Seminar (Social Studies) 
E. Renshaw (Strathclyde) 
Spacetime reaction processes and the generation of fractal structure 

Friday, 2 June, 1995 
2:15 pm 
Room 2 
Stochastc Analysis and Related Topics 
E. B. Dynkin (Cornell) 
Superdiffusions, Capacity and PDE'S 

Monday, 5 June, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Alexis Lansbury (Brunel) 
T.B.A. 

Tuesday, 6 June, 1995 
4:00 pm 
Room 2 
Geometry and Groups Seminar 
Andreas Zastrow (Warwick) 
Large Free and NonFree Subgroups in the Fundamental Group of the Hawaiian Earrings and in the Inverse Limit of Free Groups 

Tuesday, 6 June, 1995 
4:00 pm 
Room 1 
Stochastic Analysis & Related Topics 
S. Paycha (Strasbourg) 
Heat Kernel versus zeta function represtentation for ∞ dimentional determinants 

Thursday, 8 June, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
A. Ventzell (Tulane) 
Asymptotic Expansions in Limit theorems for Stochastic Processes. 

Friday, 9 June, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
Steve Rosenberg (Boston University) 
Minimal orbits of YangMills connections metrics and Dirac operators 

Friday, 9 June, 1995 
4:00 pm 
Room 2 
Colluquium 
E. B. Dynkin (Cornell) 
Probability and PDE'S: History and recent progress 

Monday, 12 June, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Dave Broomhead (Malvern) 
Time series embedding with state dependent sampling 

Tuesday, 13 June, 1995 
2:00 pm 
Room 1 
Topology Seminar 
Andreas Zastrow (Warwick) 
'1 Determined Generalized Covering Spaces and their Relation to Nice Group Actions on Âtrees 

Tuesday, 13 June, 1995 
4:00 pm 
Room 2 
Geometry and Groups Seminar 
Jack Button (Oxford) 
Combination Theorems and Schottky Groups 

Tuesday, 13 June, 1995 
4:00 pm 
Room 1 
Stochastic Analysis & Related Topics 
M. Freidlin (Maryland) 
Some asymptotic problems for ReactionDiffusion Equations 

Wednesday, 14 June, 1995 
3:00 pm 
Room Quiet Room 
Nonlinear Systems Laboratory Seminar 
Jacques Sepulchre (Warwick) 
Persistence from the zerocoupling case in networks of bistable units 

Thursday, 15 June, 1995 
4:00 pm 
Room 1 
Stochastic Analysis & Related Topics 
S. Kuznetsov (Moscow) 
Linear additive functions of super diffusions 

Friday, 16 June, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
T. Lyons (Imperial) 
Branching processes and nonlinear filtering 

Monday, 19 June, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
Richard L. Kautz (Nat. Inst. of Standards & Technology, U.S.A.) 
Quasipotentials and the binding energy of attractors 

Tuesday, 20 June, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
N. Krylov (Minnesota) 
Lp theory of Stochastic p.d.e. I 

Tuesday, 20 June, 1995 
4:00 pm 
Room 2 
Geometry and Groups Seminar 
Caroline Series (Warwick) 
Pleating Coordinates and Deforming Kleinian Groups: An Update (I) Quasifuchsian Space 

Tuesday, 20 June, 1995 
4:00 pm 
Room 1 
Stochastic Analysis & Related Topics 
A. Wentzell & M. Freidlin (Tulane & Maryland) 
Pertubations of systems with conservation laws 

Thursday, 22 June, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
N. Krylov (Minnesota) 
Lp Theory of Stchastic p.d.e II 

Thursday, 22 June, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Naomasa Ueki (Himeji) 
Asymptotics of stochastic oscillatory integrals 

Monday, 26 June, 1995 
2:00 pm 
Room 2 
Nonlinear Systems Laboratory Seminar 
David MacKay (Cambridge) 
Density networks 

Tuesday, 27 June, 1995 
11:30 am 
Room 2 
Stochastic Analysis & Related Topics 
N. Krylov (Minnesota) 
Quasi Derivatives I 

Tuesday, 27 June, 1995 
4:00 pm 
Room 2 
Geometry and Groups Seminar 
Caroline Series (Warwick) 
Pleating Coordinates and Deforming Kleinian Groups: An Update (II) an Example in Ç2 

Tuesday, 27 June, 1995 
4:30 pm 
Room 1 
Stochastic Analysis & Related Topics 
S. Kuznetsov (Moscow) 
Duality theory for Markov processes 

Thursday, 29 June, 1995 
2:15 pm 
Room 2 
Stochastic Analysis & Related Topics 
N. Krylov (Minnesota) 
Quasi DerivativesII 

Thursday, 29 June, 1995 
4:00 pm 
Room 2 
Stochastic Analysis & Related Topics 
Istvan Gyongy (Barcelona/Budapest) 
Robustness in nonlinear filtering 

Tuesday, 4 July, 1995 
2:15 pm 
Room 1 
Stochastic Analysis and Related Topics 
I. Gyongy (Budapest/Barcelona) 
Support Theorems for SPDE'S 

Tuesday, 4 July, 1995 
4:00 pm 
Room 1 
Stochastic Analysis and Related Topics 
A. Verettenikov (Moscow) 
Large Deviations and the Stochastic Averaging Principle 

Thursday, 6 July, 1995 
2:15 pm 
Room 2 
Stochastic Analysis and Related Topics 
Bronius Grigelionis (Lithuania) 
Lundberg Exponents of Markov Additive Processes 

Monday, 10 July, 1995 
11:00 am 
Room ELT 1 
Transfer operators and dynamical zeta functions: recent results 
Baladi (Geneva) 
Ergodic Theory on Riemannian Manifolds 

Monday, 10 July, 1995 
2:30 pm 
Room ELT 1 
Geometric coding for Kleinian groups 
Rocha (Recife) 
Ergodic Theory on Riemannian Manifolds 

Tuesday, 11 July, 1995 
11:00 am 
Room ELT 1 
Z^n actions via Pesin Theory 
Katok (Penn State) 
Ergodic Theory on Riemannian Manifolds 

Tuesday, 11 July, 1995 
2:30 pm 
Room ELT 1 
Minimal submanifolds in manifolds of hyperbolic type 
Bangert (Freiburg) 
Ergodic Theory on Riemannian Manifolds 

Wednesday, 12 July, 1995 
9:30 am 
Room ELT 1 
Rigidity of higher dimensional dynamical systems 
Llave (Austin) 
Ergodic Theory on Riemannian Manifolds 

Wednesday, 12 July, 1995 
2:30 pm 
Room ELT 1 
Geometric actions of higher rank semisimple groups 
Feres (Washington) 
Ergodic Theory on Riemannian Manifolds 

Thursday, 13 July, 1995 
9:30 am 
Room ELT 1 
Quantitative version of the Oppenheim conjecture 
Mozes (Hebrew) 
Ergodic Theory on Riemannian Manifolds 

Thursday, 13 July, 1995 
11:00 am 
Room ELT 1 
A simple proof of the Mostow rigidity theorem 
Besson (Grenoble) 
Ergodic Theory on Riemannian Manifolds 

Thursday, 13 July, 1995 
2:30 pm 
Room ELT 1 
New contact Anosov flows and cocycles 
Foulon (Strasbourg) 
Ergodic Theory on Riemannian Manifolds 

Friday, 14 July, 1995 
4:00 pm 
Room 2 
Colloquium 
M.W. Hirsch (Berkeley) 
Dynamics, Stochastic Approximation and Repeated Games 

Monday, 17 July, 1995 
9:30 am 
Room ELT 1 
Rotation and periodic points for torus diffeomorphisms 
Sharp (Oxford) 
Ergodic Theory on Riemannian Manifolds 

Monday, 17 July, 1995 
11:00 am 
Room ELT 1 
Dynamical averaging for hyperbolic analytic systems 
Rugh (IHES) 
Ergodic Theory on Riemannian Manifolds 

Monday, 17 July, 1995 
4:00 pm 
Room ELT 1 
Periodic orbit correlations in chaotic systems 
Keating (Manchester) 
Ergodic Theory on Riemannian Manifolds 

Tuesday, 18 July, 1995 
9:30 am 
Room ELT 1 
Hausdorff measures and eigen functions 
Hamenstadt (Bonn) 
Ergodic Theory on Riemannian Manifolds 

Tuesday, 18 July, 1995 
11:00 am 
Room ELT 1 
Linear and nonlinear generalizations of Mostow rigidity 
Yue (Penn State) 
Ergodic Theory on Riemannian Manifolds 

Tuesday, 18 July, 1995 
2:30 pm 
Room ELT 1 
Rigidity of manifolds with negative curvature 
Knieper (Augsburg) 
Ergodic Theory on Riemannian Manifolds 

Tuesday, 18 July, 1995 
4:00 pm 
Room ELT 1 
Pesin theory for foliations 
Hurder (Illinois) 
Ergodic Theory on Riemannian Manifolds 

Wednesday, 19 July, 1995 
9:30 am 
Room ELT 1 
Lalley's Theorem for Anasov flows 
Babillot (Paris VI) 
Ergodic Theory on Riemannian Manifolds 

Wednesday, 19 July, 1995 
9:30 am 
Room ELT 1 
Lalley's Theorem for Anasov flows 
Babillot (Paris VI) 
Ergodic Theory on Riemannian Manifolds 

Wednesday, 19 July, 1995 
11:00 am 
Room ELT 1 
Closed geodesic on negative curved manifolds with cusps 
Dal'Bo (Rennes I) 
Ergodic Theory on Riemannian Manifolds 

Wednesday, 19 July, 1995 
2:30 pm 
Room ELT 1 
Periodic orbit correlations in chaotic systems 
Kifer (Jeruslaem) 
Ergodic Theory on Riemannian Manifolds 

Thursday, 20 July, 1995 
9:30 am 
Room ELT 1 
Intermediate foliations for Anasov diffeomorphms 
Pesin (Penn State) 
Ergodic Theory on Riemannian Manifolds 

Thursday, 20 July, 1995 
11:00 am 
Room ELT 1 
The Lyapunov and dimension spectra for expanding maps 
Weiss (Penn State) 
Ergodic Theory on Riemannian Manifolds 

Thursday, 20 July, 1995 
2:30 pm 
Room ELT 1 
Ergodic geodesic flows on spheres 
Burns (Northwestern) 
Ergodic Theory on Riemannian Manifolds 

Thursday, 20 July, 1995 
4:00 pm 
Room ELT 1 
Counting geodesic arcs and entropy 
Paternain (Montevideo) 
Ergodic Theory on Riemannian Manifolds 

Friday, 21 July, 1995 
9:30 am 
Room ELT 1 
The metric boundary for a CAT(1) space 
Bourdon (Nancy) 
Ergodic Theory on Riemannian Manifolds 

Friday, 21 July, 1995 
11:00 am 
Room ELT 1 
Regularity of the Anosov splitting 
Hasselblatt (Tufts) 
Ergodic Theory on Riemannian Manifolds 

Friday, 21 July, 1995 
2:30 pm 
Room ELT 1 
Brownian motion on foliations 
Kaimanovich (Rennes I) 
Ergodic Theory on Riemannian Manifolds 

Friday, 21 July, 1995 
4:00 pm 
Room ELT 1 
Asymptotic properties of Brownian motion in negative curvature 
Ledrappier (Paris VI) 
Ergodic Theory on Riemannian Manifolds 

Friday, 21 July, 1995 
4:00 pm 
Room ELT 1 
About the central limit theorem for dynamical systems 
Liverani (Rome II) 
Ergodic Theory on Riemannian Manifolds 

Tuesday, 8 August, 1995 
11:00 am 
Room 2 
Stochastic Analysis and Related Topics 
T.Y. Wang (Beijing) 
Applications of coupling methods to eigenvalue estimation 

Tuesday, 8 August, 1995 
4:00 pm 
Room 2 
Stochastic Analysis and Related Topics 
Jan van Casteran (Antwerp) 
Cauchy semigroups and scattering theory 

Wednesday, 9 August, 1995 
2:15 pm 
Room 2 
Stochastic Analysis and Related Topics 
W. Zheng (Irvine) 
Some remarks about heat kernels on Lipschitz manifolds 

Monday, 11 September, 1995 
9:45 am 
Room Room 2 
Algebraic Geometry Seminar 
Miles Reid (Warwick) 
Introduction to Calssification 

Monday, 11 September, 1995 
2:00 pm 
Room ELT 1 
Algebraic Geometry Seminar 
Gregory Sankaran (Cambridge) 
Introduction to Abelian varieties 

Monday, 11 September, 1995 
3:30 pm 
Room ELT 1 
Algebraic Geometry Seminar 
David Mond (Warwick) 
Analytic geometry, singularity theory and algebraic geometry 

Monday, 11 September, 1995 
5:00 pm 
Room ELT 1 
Algebraic Geometry Seminar 
Miles Reid (Warwick) 
What is algebraic geometry? 

Tuesday, 12 September, 1995 
9:45 am 
Room ELT 1 
Algebraic Geometry 
F. Kirwan 
What are moduli spaces? 

Tuesday, 12 September, 1995 
2:00 pm 
Room ELT 1 
Algebraic Geometry Seminar 
W. Oxbury 
Geometry of Complex Curves, I 

Tuesday, 12 September, 1995 
3:30 pm 
Room ELT 1 
Algebraic Geometry 
N. Hitchin 
Flat connections and vector bundles 

Tuesday, 12 September, 1995 
11:30 pm 
Room 2 
Algebraic Geometry Seminar 
W. Oxbury 
Geometry of Complex Curves, II 

Thursday, 14 September, 1995 
9:45 am 
Room ELT 1 
Algebraic Geometry 
M. Beltrametti 
Adjunction theory for surfaces 

Thursday, 14 September, 1995 
11:30 am 
Room ELT 1 
Algebraic Geometry 
A.V. Pukhlikov (Moscow) 
Cremona's theorem 

Thursday, 14 September, 1995 
2:00 pm 
Room ELT 1 
Algebraic Geometry 
V. Batyrev 
Introduction to CalabiYau 3folds and mirror symmetry 

Thursday, 14 September, 1995 
3:30 pm 
Room ELT 1 
Algebraic Geometry 
F. Campana 
Kodaira dimension and fundamental group of compact Kähler manifolds 

Friday, 15 September, 1995 
11:00 am 
Room ELT 1 
Spitalfields Day 
Salamon (Warwick) 
SeibergWitten invariants and symplectic geometry 

Friday, 15 September, 1995 
12:30 pm 
Room ELT 1 
Spitalfields Day 
Klyachko 
Stable bundles and Hermitian operators 

Friday, 15 September, 1995 
3:00 pm 
Room ELT 1 
Spitalfields Day 
Z. Ran 
Period vectors of CalabiYau manifolds, or: How to tell you're hearing a CalabiYau 

Friday, 15 September, 1995 
4:30 pm 
Room ELT 1 
Algebraic Geometry 
W. Fulton 
Degenaracy loci for the classical groups 

Saturday, 16 September, 1995 
9:45 am 
Room ELT 1 
Algebraic Geometry Seminar 
J. Stevens 
Deformations 

Saturday, 16 September, 1995 
11:30 am 
Room ELT 1 
Algebraic Geometry 
F. Campana 
Albanese map and lower central series of the fundamental group of compact Kähler manifolds 

Monday, 18 September, 1995 
2:00 pm 
Room ELT 1 
Algebraic Geometry 
K. Hulek 
Moduli spaces of abelian and K3 surfaces and their compactifications 

Monday, 18 September, 1995 
3:45 pm 
Room ELT 1 
Algebraic Geometry 
V. Batyrev 
On moduli spaces of toric hypersurfaces 

Monday, 18 September, 1995 
5:00 pm 
Room ELT 1 
Algebraic Geometry 
S. Ishii 
Canonical modification of hypersurface singularities 

Tuesday, 19 September, 1995 
9:30 am 
Room ELT 1 
Lalley's Theorem for Anasov flows 
Babillot (Paris VI) 
Ergodic Theory on Riemannian Manifolds 

Tuesday, 19 September, 1995 
9:30 am 
Room ELT 1 
Algebraic Geometry Seminar 
W. Fulton 
Intersection theory and toric varieties 

Tuesday, 19 September, 1995 
11:00 am 
Room ELT 1 
Algebraic Geometry 
Y. Hu 
On protoric varieties 

Tuesday, 19 September, 1995 
2:00 pm 
Room ELT 1 
Algebraic Geometry 
Miles Reid (Warwick) 
Some flips 

Tuesday, 19 September, 1995 
4:00 pm 
Room ELT 1 
Algebraic Geometry 
J.M. Jurkiewicz 
Linearizing degree 3 torus actions on Ç3 

Wednesday, 20 September, 1995 
9:30 am 
Room ELT 1 
Algebraic Geometry Seminar 
Barthel 
Invariant divisors and homology of complex toric varieties 

Wednesday, 20 September, 1995 
11:00 am 
Room ELT 1 
Algebraic Geometry 
D. Luna 
Sphereical varieties 

Wednesday, 20 September, 1995 
2:00 pm 
Room ELT 1 
Algebraic Geometry Seminar 
G. Ewald 
Toric Fano varieties and reflexive polytopes 

Wednesday, 20 September, 1995 
4:00 pm 
Room ELT 1 
Algebraic Geometry Seminar 
J. Fine 
Convex polytopes, flag vectors, local cycles and intersection homology 

Thursday, 21 September, 1995 
9:30 am 
Room ELT 1 
Algebraic Geometry 
V.V. Nikulin 
K3 surfaces and KacMoody algebras 

Thursday, 21 September, 1995 
11:00 am 
Room ELT 1 
Algebraic Geometry 
Y. Ito 
Crepant resolution of Gorenstein quotient singularities 

Friday, 22 September, 1995 
2:00 pm 
Room ELT 1 
Algebraic Geometry 
J.M. Kantor 
Integral polytopes: Dehn, EulerPoincaré, and Erhart 

Friday, 22 September, 1995 
2:00 pm 
Room ELT 1 
Algebraic Geometry 
R. Laterveer 
Chow and étale (co)homology of linear varieties 

Friday, 22 September, 1995 
4:00 pm 
Room ELT 1 
Algebraic Geometry Seminar 
D. Dais 
Triangulate by avoiding whirlpools (crepant resolutions of Gorenstein toric singlarities) 
