Upper Case

Lower Case

Name & Description

A

a

alpha
Lower case alpha is used in geometry to identify angles in plane figures.

B

b

beta
Lower case beta is used in geometry to identify angles in plane figures.

G

g

gamma
Lower case gamma is used in geometry to identify angles in plane figures.

D

d

delta
Upper case delta is used in geometry to represent the area of a plane figure and in physics to represent a change in a coordinate.
Lower case delta is used in calculus to represent a small amount.

E

e

epsilon

Z

z

zeta

H

h

eta

Q

q

theta
Lower case theta is used in geometry to identify an angle.

I

i

iota

K

k

kappa

L

l

lambda
Lower case lambda is used in vector calculations to identify a scalar.

M

m

mu
Lower case mu is used in the metric system to identify the prefix "micro" (base unit * 0.000 001) and (in italic form) to identify the arithmetic mean.

N

n

nu

X

x

xi
Lower case xi is used to identify the universal set.

O

o

omicron

P

p

pi
Lower case pi is used to identify the constant relationship between the diameter of a circle and its circumference [3.141 592 653 589].
Uppercase pi is used to identify that a continued product is needed.

R

r

rho

S

s

sigma
Upper case sigma is used to identify the sum of a series of values.
Lower case sigma is used to identify the standard deviation of a population.

T

t

tau
Lower case tau is used in geometry / mathematics as one of the symbols used to represent the golden ratio / Fibonacci sequence / [1.618 033 988 749].(see phi).

U

u

upsilon

F

f

phi
Upper case phi is used to identify an empty set.
Lower case phi is used in geometry / mathematics as one of the symbols used to represent the golden ratio / Fibonacci sequence / [1.618 033 988 749].(see tau)

C

c

chi
Lower case chi is used in statistics to identify the chi squared test.

Y

y

psi

W

w

omega Upper case omega is used in measurement to identify the base unit of resistance (ohm).
