W3C HTML 网页标准教程

HTML 符号实体

本字符实体参考手册包括了数学符号、希腊字符、各种箭头记号、科技符号以及形状。

注释：实体名称对大小写敏感。

HTML 支持的数学符号

结果 描述 实体名称 实体编号
∀ for all ∀ ∀
∂ part ∂ ∂
∃ exists &exists; ∃
∅ empty ∅ ∅
∇ nabla ∇ ∇
∈ isin ∈ ∈
∉ notin ∉ ∉
∋ ni ∋ ∋
∏ prod ∏ ∏
∑ sum ∑ ∑
− minus − −
∗ lowast ∗ ∗
√ square root √ √
∝ proportional to ∝ ∝
∞ infinity ∞ ∞
∠ angle ∠ ∠
∧ and ∧ ∧
∨ or ∨ ∨
∩ cap ∩ ∩
∪ cup ∪ ∪
∫ integral ∫ ∫
∴ therefore ∴ ∴
∼ simular to ∼ ∼
≅ approximately equal ≅ ≅
≈ almost equal ≈ ≈
≠ not equal ≠ ≠
≡ equivalent ≡ ≡
≤ less or equal ≤ ≤
≥ greater or equal ≥ ≥
⊂ subset of ⊂ ⊂
⊃ superset of ⊃ ⊃
⊄ not subset of ⊄ ⊄
⊆ subset or equal ⊆ ⊆
⊇ superset or equal ⊇ ⊇
⊕ circled plus ⊕ ⊕
⊗ cirled times ⊗ ⊗
⊥ perpendicular ⊥ ⊥
⋅ dot operator ⋅ ⋅

HTML 支持的希腊字母

结果 描述 实体名称 实体编号
Α Alpha Α Α
Β Beta Β Β
Γ Gamma Γ Γ
Δ Delta Δ Δ
Ε Epsilon Ε Ε
Ζ Zeta Ζ Ζ
Η Eta Η Η
Θ Theta Θ Θ
Ι Iota Ι Ι
Κ Kappa Κ Κ
Λ Lambda Λ Λ
Μ Mu Μ Μ
Ν Nu Ν Ν
Ξ Xi Ξ Ξ
Ο Omicron Ο Ο
Π Pi Π Π
Ρ Rho Ρ Ρ
  Sigmaf   undefined
Σ Sigma Σ Σ
Τ Tau Τ Τ
Υ Upsilon Υ Υ
Φ Phi Φ Φ
Χ Chi Χ Χ
Ψ Psi Ψ Ψ
Ω Omega Ω Ω
       
α alpha α α
β beta β β
γ gamma γ γ
δ delta δ δ
ε epsilon ε ε
ζ zeta ζ ζ
η eta η η
θ theta θ θ
ι iota ι ι
κ kappa κ κ
λ lambda λ Λ
μ mu μ μ
ν nu ν Ν
ξ xi ξ ξ
ο omicron ο ο
π pi π π
ρ rho ρ ρ
ς sigmaf ς ς
σ sigma σ σ
τ tau τ τ
υ upsilon υ υ
φ phi φ φ
χ chi χ χ
ψ psi ψ ψ
ω omega ω ω
       
ϑ theta symbol ϑ ϑ
ϒ upsilon symbol ϒ ϒ
ϖ pi symbol ϖ ϖ

HTML 支持的其他实体

结果 描述 实体名称 实体编号
Œ capital ligature OE Œ Œ
œ small ligature oe œ œ
Š capital S with caron Š Š
š small S with caron š š
Ÿ capital Y with diaeres Ÿ Ÿ
ƒ f with hook ƒ ƒ
ˆ modifier letter circumflex accent ˆ ˆ
˜ small tilde ˜ ˜
  en space    
  em space    
  thin space    
‌ zero width non-joiner ‌ ‌
‍ zero width joiner ‍ ‍
‎ left-to-right mark ‎ ‎
‏ right-to-left mark ‏ ‏
– en dash – –
— em dash — —
‘ left single quotation mark ‘ ‘
’ right single quotation mark ’ ’
‚ single low-9 quotation mark ‚ ‚
“ left double quotation mark “ “
” right double quotation mark ” ”
„ double low-9 quotation mark „ „
† dagger † †
‡ double dagger ‡ ‡
• bullet • •
… horizontal ellipsis … …
‰ per mille ‰ ‰
′ minutes ′ ′
″ seconds ″ ″
‹ single left angle quotation ‹ ‹
› single right angle quotation › ›
‾ overline ‾ ‾
€ euro € €
™ trademark ™ ™
← left arrow ← ←
↑ up arrow ↑ ↑
→ right arrow → →
↓ down arrow ↓ ↓
↔ left right arrow ↔ ↔
↵ carriage return arrow ↵ ↵
⌈ left ceiling ⌈ ⌈
⌉ right ceiling ⌉ ⌉
⌊ left floor ⌊ ⌊
⌋ right floor ⌋ ⌋
◊ lozenge ◊ ◊
♠ spade ♠ ♠
♣ club ♣ ♣
♥ heart ♥ ♥
♦ diamond ♦ ♦