# WMI Preprints 1971

*Sets of constant distance from a planar set,*

by M. Brown

*Periodic flows on three-manifolds*,

by D.B.A. Epstein

*Levi factors of infinite-dimensional Lie algebras,*

by I. Stewart

*Pointwise periodic homeomorphisms of continua,*

by N. Weaver

*The Clifford algebra and the Spinor group of a Hilbert space,*

by P. de la Harpe

*An analytic construction of degenerating curves over complete local rings, and an analytic construction of degenerating abelian varieties over complete rings,*

by D. Mumford

*Tensorial extensions of central simple algebras,*

by I. Stewart

*Saddle points for linear differential games,*

by R.J. Elliott, N.J. Kalton & L. Markus

*Sylow p-subgroups and local p-solubility,*

by B. Hartley

*The duality pairs of wedges,*

by G.J.O. Jameson

*The existence of value in differential games,*

by R.J. Elliott & N.J. Kalton

*The existence of value in differential games of pursuit and evasion,*

by R.J. Elliott & N.J. Kalton

*A note on isomorphism of Markov shifts,*

by M. Smorodinsky

*Paracompactness: an expository essay,*

by P.R. Blindell

*Derivations in a class of Banach-Lie algebras,*

by P. de la Harpe

*Séries de Poincaré des espaces hermitiens symétriques stables,*

by P. de la Harpe

*Groups of diffeomorphisms and their subgroups,*

by H. Omori

*Permutable subgroups of infinite groups,*

by S.E. Stonehewer

*About interactions between Banach-Lie groups and finite dimensional manifolds,*

by H. Omori and P. de la Harpe

*Three notes about the cohomology of a class of Banach-Lie algebras,*

by P. de la Harpe & R. Ramer

*Calcul des elements primitifs dans la cohomologie des algebres de Lie classiques,*

by P. de la Harpe

*A geometric approach to homology theory: parts I & II,*

by C.P. Rourke & B.J. Sanderson

*A geometric approach to homology theory: a set of seven papers,*

by S. Buoncristiano, C.P. Rourke & B.J. Sanderson

*Some counterexamples in the theory of analytic subsets of Banach spaces,*

by M.J. Field

*A note on F-reducibility,*

by B. Hartley

*On the automorphism group of a 2-group,*

by T.O. Hawkes

*Surfaces of constant mean curvature in constant curvature manifolds,*

by D.A. Hoffman

*A topological classification of crystal lattices,*

by R.L.E. Schwarzenberger

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