2, β, β, bet, β, magnetic flux coefficient; Angle; Coefficient.

3.γ, γ, γ, ga:m, γ, conductivity (lowercase).

4, delta, delta, delta, delta, change; Density; Refraction.

5.ε, ε, ε, ep`silon, ε, radix of logarithm.

6. zeta, zeta, zat, tache, coefficient; Azimuth; Impedance; Relative viscosity; Atomic number.

7.η, η, η, eit, η, lag coefficient; Efficiency (lowercase).

8.θ, θ, thet, θit, West Tower, temperature; Phase angle.

9, ψ, ψ, psipsai, Pushy angular velocity; Dielectric flux (static power line); Horn.

Symbol type

1, quantity symbol

For example, pi (π, 3. 14 159265358979), natural rate (e, 2.7 1828), Fibonacci golden section (φ, 0.6 18033), imaginary number (.

2. Operation symbols

Such as plus sign (+), minus sign (-), multiplication sign (× or), division sign (÷ or/), union of two sets (∩), intersection (∩), root sign (∩ ~), logarithm (log, lg, ln,