Symbol Catalog

I got tired of hunting all over the place looking for the text representation of various symbols (mostly set and logic symbols), so I figured I would put them all in one easy to find place.  The Greek alphabet I got from Wikipedia, the rest I found at rapidtables.com.  I didn't bother with anything that was already on the keyboard (like < and >), and I didn't do anything that requires an image (that's what LibreOffice Math is for...)

Greek Alphabet (From Wikipedia)

  Α α  - Alpha

  Β β  - Beta

  Γ γ  - Gamma

  Δ δ  - Delta

  Ε ε  - Epsilon

  Ζ ζ  - Zeta  

  Η η  - Eta  

  Θ θ  - Theta

  Ι ι  - Iota 

  Κ κ  - Kappa  

  Λ λ  - Lambda   

  Μ μ  - Mu 

  Ν ν  - Nu

  Ξ ξ  - Xi

  Ο ο  - Omicron

  Π π  - Pi

  Ρ ρ  - Rho

  Σ σ ς - Sigma

  Τ τ  - Tau

  Υ υ  - Upsilon

  Φ φ  - Phi

  Χ χ  - Chi      

  Ψ ψ  - Psi

  Ω ω  - Omega

Set Symbols

  ∩  - intersection 

  ∪  - union

  ⊆  - subset

  ⊂  - strict subset

  ⊄  - not subset

  ⊇  - superset

  ⊃  - strict superset

  ⊅  - not subset

  ⊖  - symetrical difference (alt  Δ)

  ∈  - element of, member of

  ∉  - not element of, not member of

  Ø  - empty set
  ℝ  - real numbers
  ℂ  - complex numbers
  ℤ  - integers
  ℚ  - rationals 
  ℕ  - natural numbers (non-negative integers)

Logic Symbols

  ∧  - and

  ∨  - or

  ¬  - not

  ⊕  - xor

  ⇒  - implies

  ⇔  - equivalent

  ∀  - for all

  ∃  - there exists (for any)

  ∄  - there does not exist (for none)

  ∴  - therefore

  ∵  - because/since

Math Symbols

  ≡  - equivalence

  ≜  - equal by definition

  ≈  - approximately equal

  ∝  - proportional to

  ∞  - infinity

  ≥  - greater than or equal

  ≤  - less than or equal

  ≠  - not equal

  ⊥  - perpendicular, orthogonal to, independent of
  ⫫  - independence

  °  - degree

  ∠  - angle

  ≅  - congruence

  ÷  - division
  ±  - plus or minus
  ∟  - right angle
  ∫  - integral
  ∮  - closed line integral
  ∯  - closed surface integral
  ∰  - closed volume integral

  ∇  - gradient
  √ - radix (square root)