The Greek alphabet

The Greek Alphabet

Note that, often, a written version of a Greek letter is easier to parse quickly than the versions seen below!

Name	Upper case	Lower case	Often used for:
Alpha	A	$\alpha$
Beta	B	$\beta$
Gamma	$\mit\Gamma$	$\gamma$
Delta	$\mit\Delta$	$\delta$	A small number
Epsilon	E	$\epsilon,\varepsilon$	Another small number
Zeta	Z	$\zeta$
Eta	H	$\eta$
Theta	$\mit\Theta$	$\theta,\vartheta$	Angle
Iota	I	$\iota$
Kappa	K	$\kappa$
Lambda	$\mit\Lambda$	$\lambda$	Eigenvalue
Mu	M	$\mu$
Nu	N	$\nu$
Xi	$\mit\Xi$	$\xi$	Unknown quantity,x
Omicron	O	o
Pi	$\mit\Pi,\prod_{i=1}^n$	$\pi,\varpi$	Product, $\pi=3.14159\dots$
Rho	P	$\rho,\varrho$
Sigma	$\mit\Sigma,\sum_{i=1}^n$	$\sigma$	Sum, standard deviation
Tau	T	$\tau$
Upsilon	$\mit\Upsilon$	$\upsilon$	Rarely, if ever, used
Phi	$\mit\Phi$	$\phi,\fie$	Another angle
Chi	X	$\chi$
Psi	$\mit\Psi$	$\psi$
Omega	$\mit\Omega$	$\omega$	Angular velocity, the end.