| Letter |
Name |
Usage |
| Α α |
alpha |
angle |
| Β β |
beta |
angle |
| Γ γ |
gamma |
monitor nonlinearity, Generalization of factorial, angle |
| Δ δ |
delta |
Difference, impulse signal (Dirac delta), angle |
| Ε ε |
epsilon |
infinitesimal quantity, dialectric susceptibility |
| Ζ ζ |
zeta |
complex Riemann function |
| Η η |
eta |
- |
| Θ θ |
theta |
angle |
| Ι ι |
iota |
- |
| Κ κ |
kappa |
- |
| Λ λ |
lambda |
wavelength, length |
| Μ μ |
mu |
magnetic susceptibility |
| Ν ν |
nu |
frequency (in quantum theory) |
| Ξ ξ |
xi |
- |
| Ο ο |
omicron |
- |
| Π π |
pi |
Product, ratio of circumference to diameter |
| Ρ ρ |
rho |
density |
| Σ σ |
sigma |
Sum |
| Τ τ |
tau |
- |
| Υ υ |
upsilon |
- |
| Φ φ |
phi |
angle |
| Χ χ |
chi |
- |
| Ψ ψ |
psi |
Heisenberg wave function |
| Ω ω |
omega |
angular velocity |
