HTML Entities for symbols, mathematical symbols, and Greek letters

These entities were taken directly from the HTML 4.0 specification.

Mnemonic Output Code Output Description
Latin Extended-B
ƒ= ƒƒ= ƒlatin small f with hook = function = florin, U+0192 ISOtech
Α= ΑΑ= Αgreek capital letter alpha, U+0391
Β= ΒΒ= Βgreek capital letter beta, U+0392
Γ= ΓΓ= Γgreek capital letter gamma, U+0393 ISOgrk3
Δ= ΔΔ= Δgreek capital letter delta, U+0394 ISOgrk3
Ε= ΕΕ= Εgreek capital letter epsilon, U+0395
Ζ= ΖΖ= Ζgreek capital letter zeta, U+0396
Η= ΗΗ= Ηgreek capital letter eta, U+0397
Θ= ΘΘ= Θgreek capital letter theta, U+0398 ISOgrk3
Ι= ΙΙ= Ιgreek capital letter iota, U+0399
Κ= ΚΚ= Κgreek capital letter kappa, U+039A
Λ= ΛΛ= Λgreek capital letter lambda, U+039B ISOgrk3
Μ= ΜΜ= Μgreek capital letter mu, U+039C
Ν= ΝΝ= Νgreek capital letter nu, U+039D
Ξ= ΞΞ= Ξgreek capital letter xi, U+039E ISOgrk3
Ο= ΟΟ= Οgreek capital letter omicron, U+039F
Π= ΠΠ= Πgreek capital letter pi, U+03A0 ISOgrk3
Ρ= ΡΡ= Ρgreek capital letter rho, U+03A1
there is no Sigmaf, and no U+03A2 character either
Σ= ΣΣ= Σgreek capital letter sigma, U+03A3 ISOgrk3
Τ= ΤΤ= Τgreek capital letter tau, U+03A4
Υ= ΥΥ= Υgreek capital letter upsilon, U+03A5 ISOgrk3
Φ= ΦΦ= Φgreek capital letter phi, U+03A6 ISOgrk3
Χ= ΧΧ= Χgreek capital letter chi, U+03A7
Ψ= ΨΨ= Ψgreek capital letter psi, U+03A8 ISOgrk3
Ω= ΩΩ= Ωgreek capital letter omega, U+03A9 ISOgrk3
α= αα= αgreek small letter alpha, U+03B1 ISOgrk3
β= ββ= βgreek small letter beta, U+03B2 ISOgrk3
γ= γγ= γgreek small letter gamma, U+03B3 ISOgrk3
δ= δδ= δgreek small letter delta, U+03B4 ISOgrk3
ε= εε= εgreek small letter epsilon, U+03B5 ISOgrk3
ζ= ζζ= ζgreek small letter zeta, U+03B6 ISOgrk3
η= ηη= ηgreek small letter eta, U+03B7 ISOgrk3
θ= θθ= θgreek small letter theta, U+03B8 ISOgrk3
ι= ιι= ιgreek small letter iota, U+03B9 ISOgrk3
κ= κκ= κgreek small letter kappa, U+03BA ISOgrk3
λ= λλ= λgreek small letter lambda, U+03BB ISOgrk3
μ= μμ= μgreek small letter mu, U+03BC ISOgrk3
ν= νν= νgreek small letter nu, U+03BD ISOgrk3
ξ= ξξ= ξgreek small letter xi, U+03BE ISOgrk3
ο= οο= οgreek small letter omicron, U+03BF NEW
π= ππ= πgreek small letter pi, U+03C0 ISOgrk3
ρ= ρρ= ρgreek small letter rho, U+03C1 ISOgrk3
ς= ςς= ςgreek small letter final sigma, U+03C2 ISOgrk3
σ= σσ= σgreek small letter sigma, U+03C3 ISOgrk3
τ= ττ= τgreek small letter tau, U+03C4 ISOgrk3
υ= υυ= υgreek small letter upsilon, U+03C5 ISOgrk3
φ= φφ= φgreek small letter phi, U+03C6 ISOgrk3
χ= χχ= χgreek small letter chi, U+03C7 ISOgrk3
ψ= ψψ= ψgreek small letter psi, U+03C8 ISOgrk3
ω= ωω= ωgreek small letter omega, U+03C9 ISOgrk3
ϑ= ϑϑ= ϑgreek small letter theta symbol, U+03D1 NEW
ϒ= ϒϒ= ϒgreek upsilon with hook symbol, U+03D2 NEW
ϖ= ϖϖ= ϖgreek pi symbol, U+03D6 ISOgrk3
General Punctuation
•= ••= •bullet = black small circle, U+2022 ISOpub
bullet is NOT the same as bullet operator, U+2219
…= ……= …horizontal ellipsis = three dot leader, U+2026 ISOpub
′= ′′= ′prime = minutes = feet, U+2032 ISOtech
″= ″″= ″double prime = seconds = inches, U+2033 ISOtech
‾= ‾‾= ‾overline = spacing overscore, U+203E NEW
⁄= ⁄⁄= ⁄fraction slash, U+2044 NEW
Letterlike Symbols
℘= ℘℘= ℘script capital P = power set = Weierstrass p, U+2118 ISOamso
ℑ= ℑℑ= ℑblackletter capital I = imaginary part, U+2111 ISOamso
ℜ= ℜℜ= ℜblackletter capital R = real part symbol, U+211C ISOamso
™= ™™= ™trade mark sign, U+2122 ISOnum
ℵ= ℵℵ= ℵalef symbol = first transfinite cardinal, U+2135 NEW
alef symbol is NOT the same as hebrew letter alef, U+05D0 although the same glyph could be used to depict both characters
←= ←←= ←leftwards arrow, U+2190 ISOnum
→= →→= →rightwards arrow, U+2192 ISOnum
↓= ↓↓= ↓downwards arrow, U+2193 ISOnum
↔= ↔↔= ↔left right arrow, U+2194 ISOamsa
↵= ↵↵= ↵downwards arrow with corner leftwards = carriage return, U+21B5 NEW
⇐= ⇐⇐= ⇐leftwards double arrow, U+21D0 ISOtech
Unicode does not say that lArr is the same as the 'is implied by' arrow but also does not have any other character for that function. So ? lArr can be used for 'is implied by' as ISOtech suggests
⇑= ⇑⇑= ⇑upwards double arrow, U+21D1 ISOamsa
⇒= ⇒⇒= ⇒rightwards double arrow, U+21D2 ISOtech
Unicode does not say this is the 'implies' character but does not have another character with this function so ? rArr can be used for 'implies' as ISOtech suggests
⇓= ⇓⇓= ⇓downwards double arrow, U+21D3 ISOamsa
⇔= ⇔⇔= ⇔left right double arrow, U+21D4 ISOamsa
Mathematical Operators
∀= ∀∀= ∀for all, U+2200 ISOtech
∂= ∂∂= ∂partial differential, U+2202 ISOtech
∃= ∃∃= ∃there exists, U+2203 ISOtech
∅= ∅∅= ∅empty set = null set = diameter, U+2205 ISOamso
∇= ∇∇= ∇nabla = backward difference, U+2207 ISOtech
∈= ∈∈= ∈element of, U+2208 ISOtech
∉= ∉∉= ∉not an element of, U+2209 ISOtech
∋= ∋∋= ∋contains as member, U+220B ISOtech
should there be a more memorable name than 'ni'?
∏= ∏∏= ∏n-ary product = product sign, U+220F ISOamsb
prod is NOT the same character as U+03A0 'greek capital letter pi' though the same glyph might be used for both
∑= ∑∑= ∑n-ary sumation, U+2211 ISOamsb
sum is NOT the same character as U+03A3 'greek capital letter sigma' though the same glyph might be used for both
−= −−= −minus sign, U+2212 ISOtech
∗= ∗∗= ∗asterisk operator, U+2217 ISOtech
√= √√= √square root = radical sign, U+221A ISOtech
∝= ∝∝= ∝proportional to, U+221D ISOtech
∞= ∞∞= ∞infinity, U+221E ISOtech
∠= ∠∠= ∠angle, U+2220 ISOamso
∧= ∧∧= ∧logical and = wedge, U+2227 ISOtech
∨= ∨∨= ∨logical or = vee, U+2228 ISOtech
∩= ∩∩= ∩intersection = cap, U+2229 ISOtech
∪= ∪∪= ∪union = cup, U+222A ISOtech
∫= ∫∫= ∫integral, U+222B ISOtech
∴= ∴∴= ∴therefore, U+2234 ISOtech
∼= ∼∼= ∼tilde operator = varies with = similar to, U+223C ISOtech
tilde operator is NOT the same character as the tilde, U+007E, although the same glyph might be used to represent both
≅= ≅≅= ≅approximately equal to, U+2245 ISOtech
≈= ≈≈= ≈almost equal to = asymptotic to, U+2248 ISOamsr
≠= ≠≠= ≠not equal to, U+2260 ISOtech
≡= ≡≡= ≡identical to, U+2261 ISOtech
≤= ≤≤= ≤less-than or equal to, U+2264 ISOtech
≥= ≥≥= ≥greater-than or equal to, U+2265 ISOtech
⊂= ⊂⊂= ⊂subset of, U+2282 ISOtech
⊃= ⊃⊃= ⊃superset of, U+2283 ISOtech
⊄= ⊄⊄= ⊄not a subset of, U+2284 ISOamsn
⊆= ⊆⊆= ⊆subset of or equal to, U+2286 ISOtech
⊇= ⊇⊇= ⊇superset of or equal to, U+2287 ISOtech
⊕= ⊕⊕= ⊕circled plus = direct sum, U+2295 ISOamsb
⊗= ⊗⊗= ⊗circled times = vector product, U+2297 ISOamsb
⊥= ⊥⊥= ⊥up tack = orthogonal to = perpendicular, U+22A5 ISOtech
⋅= ⋅⋅= ⋅dot operator, U+22C5 ISOamsb
dot operator is NOT the same character as U+00B7 middle dot
Miscellaneous Technical
⌈= ⌈⌈= ⌈left ceiling = apl upstile, U+2308 ISOamsc
⌉= ⌉⌉= ⌉right ceiling, U+2309 ISOamsc
⌊= ⌊⌊= ⌊left floor = apl downstile, U+230A ISOamsc
⌋= ⌋⌋= ⌋right floor, U+230B ISOamsc
⟨= ⟨〈= 〈left-pointing angle bracket = bra, U+2329 ISOtech
lang is NOT the same character as U+003C 'less than' or U+2039 'single left-pointing angle quotation mark'
⟩= ⟩〉= 〉right-pointing angle bracket = ket, U+232A ISOtech
rang is NOT the same character as U+003E 'greater than' or U+203A 'single right-pointing angle quotation mark'
Geometric Shapes
◊= ◊◊= ◊lozenge, U+25CA ISOpub
Miscellaneous Symbols
♠= ♠♠= ♠black spade suit, U+2660 ISOpub
black here seems to mean filled as opposed to hollow
♣= ♣♣= ♣black club suit = shamrock, U+2663 ISOpub
♥= ♥♥= ♥black heart suit = valentine, U+2665 ISOpub
♦= ♦♦= ♦black diamond suit, U+2666 ISOpub