HTML 4.01 符号实体

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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 ♦ ♦