Mathematical Fonts in HTML

 
(ref) http://www.alanwood.net/demos/symbol.html 
      https://fsymbols.com/signs/power/ 
      https://www.toptal.com/designers/htmlarrows/math/ 
      https://www.zipcon.net/~swhite/docs/math/math.html 
 
±    # plus minus 
×    # multiplication sign 
⋅    # dot 
÷    # division sign 
¬    # logical not 
∧    # logical AND 
∨    # logical OR 
 
ƒ    # greek letter f 
∫    # integral 
 
α       # alpha 
β       # beta 
Γ,γ     # gamma 
Δ,δ     # delta 
∇       # nabla (inverse delta)   ∇ in html 
ε       # epsilon 
η       # eta 
ζ       # zeta 
Ξ,ξ     # xi 
ι       # iota 
κ       # kappa 
θ,Θ,𝜃   # theta 
𝓛Λ,λ    # lambda 
μ       # mu 
∏Π,π,𝜋  # pi 
∑Σ,σ    # sigma 
τ       # tau 
Φ,φ,ϕ   # phi 
Ψ,ψ     # psi 
Ω,ω     # omega 
 
ℝℜ      # a set of real number     // a line 
ℝ²      # R2=R×R={(x,y):x and y are real numbers}    // a plane 
x ∈ ℝⁿ  # x is a n dimensional column vector 
 
∀    # for all 
∃    # there exists 
∴    # therefore 
∵    # because 
⊥    # uptack 
⭡    # upward arrow 
⭣    # downward arrow 
˰    # hat 
≡    # identical to 
≅,≈  # approx equal to 
∝    # proportional to  (sometimes denoted as tilde "~")  in html &prop_; or ∝_;  (remove underbar) 
≠    # not equal to 
≤    # less than or equal to 
≥    # greater than or equal to 
∞    # infinity 
ⅆ    # differential 
∂    # partial differential 
▢,■  # big square 
△,▲  # big triangle 
◇,◆  # diamond 
◯    # big circle 
•●   # a bullet 
⊗    # circled multiplication 
⊕    # circled plus 
∅    # empty set 
 
∩    # intersection 
∪    # union 
⊃    # superset of 
⊇    # superset of or equal to 
⊂    # subset of 
⊄    # not subset of 
⊆    # subset of or equal to 
∈    # element of 
∉    # not an element of 
 
√    # sqrt of 
∛    # cube root of 
∜    # fourth root of 
⁰    # power of 0 
¹    # power of 1 
⁻¹   # power of -1 
²    # power of 2  (square) 
³    # power of 3  (cube) 
⁴    # power of 4 
⁵ 
⁶ 
⁷ 
⁸ 
⁹ 
ᴬᵃ 
ᴮᵇ 
ᴰᵈ 
ᴺⁿ    # exponent n 
ᴹᵐ 
ᴳᵍ 
ᴷᵏ 
ᴾᵖ 
ᴿ 
ᵀᵗ 
⁺⁻   # exponent plus minus 
 
x₀, x₁, x₂   # sub 
 
½    # one half 
¼    # one fourth 
 
©    # copyright sign