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 |