Letter
|
Name
|
Constants
|
Functions
|
Miscellaneous
|
|
Alpha
|
|
|
|
|
alpha
|
● Fine structure constant (A003673)
|
|
|
|
Beta
|
|
● Euler Beta function
|
|
|
beta
|
|
|
|
|
Gamma
|
|
● Euler Gamma function
|
|
|
gamma
|
● Euler-Mascheroni constant (A001620)
● , the th Stieltjes constant
|
|
|
|
Delta
|
|
|
● Nabla (del in vector calculus)
● Laplacian or Laplace operator
|
|
delta
|
● Silver ratio (A014176)
|
● Dirac delta function
● Kronecker delta function
|
● Wieirstraas epsilon-delta notation
|
|
psilon
|
|
|
|
,
|
epsilon
|
|
|
● Wieirstraas epsilon-delta notation
● Levi-Civita permutation symbol [2]
|
|
Zeta
|
|
|
|
|
zeta
|
|
● Riemann zeta function (the classic "zeta function")[3]
● Dedekind zeta function[4]
● Weierstrass zeta function[5]
● Complex th root of unity [6]
|
|
|
Eta
|
|
|
|
|
eta
|
|
|
|
|
Theta
|
|
|
|
,
|
theta
|
|
● Chebyshev or Tschebycheff function [7][8]
|
● Angle symbol
|
|
Iota
|
|
|
|
|
iota
|
|
|
|
|
Kappa
|
|
|
|
|
kappa
|
|
|
|
|
Lambda
|
|
● Mangoldt lambda function
|
● -dimensional lattice [9]
|
|
lambda
|
|
● Carmichael lambda function (A002322)[10]
● Liouville lambda function (A008836)
|
|
|
Mu
|
|
|
|
|
mu
|
● Madachy's constant (A130701)[11]
|
● Möbius function (A008683)
|
● Fundamental unit in when [12]
|
|
Nu
|
|
|
|
|
nu
|
|
● Exponent of the highest power of the prime that divides [13]
● Alternate notation for number of distinct prime factors function (also ) (A001221)[14]
|
|
|
Xi
|
|
|
|
|
xi
|
|
|
|
|
Omicron
|
|
|
|
|
omicron
|
|
|
|
|
Pi
|
|
|
● Product operator
|
,
|
pi
|
● Archimedes' constant (A000796)
|
● Prime counting function (A000720) gives )
● Euler's original notation for the totient function [15]
|
|
|
Rho
|
|
|
|
,
|
rho
|
● Prime constant (A051006)
|
● Digital root function [16] (A010888)
|
● Pollard's rho method
● th zero of in the upper half of the critical strip[17]
|
|
Sigma
|
|
|
● Summation operator
|
,
|
sigma
|
|
● Number of divisors function (A000005)
● Sum of divisors function
● Sum of th powers of divisors function
● The real part of a complex number, by Riemann's notation[18]
|
|
|
Tau
|
|
|
|
|
tau
|
● Alternative symbol for the golden ratio [19]
|
● Alternative notation for [20][21]
● Ramanujan tau function (A000594)
|
|
|
Upsilon
|
|
|
|
|
upsilon
|
|
|
|
|
Phi
|
|
● Totient summatory function
|
● th cyclotomic polynomial [22]
● The Frattini subgroup of a group
● The group of units of [23]
|
,
|
phi
|
● Golden ratio (A001622)
|
● Euler's totient function
|
|
|
Chi
|
|
|
|
|
chi
|
|
● A characteristic function, like the characteristic function of the primes
|
● Modular character
|
|
Psi
|
|
|
|
|
psi
|
|
● Alternative notation for the Liouville lambda function
● Alternative notation for the Carmichael reduced totient function
● Dedekind psi function
|
|
|
Omega
|
● Chaitin's constant
|
● Number of prime factors function (A001222)[24]
|
● The th omega subgroup of a -group
● The th agemo subgroup of a -group
|
|
omega
|
● Smallest countably infinite ordinal number
|
● Number of distinct prime factors function [25][26]
|
● Complex cubic root of unity [27]
|