Mathematical Operator Entities
The character entity references in this section produce characters whose numeric equivalents should already be supported by conforming HTML 2.0 user agents. Thus, the character entity reference ÷ is a more convenient form than ÷ for obtaining the division sign (÷).
To support these named entities, user agents need only recognize the entity names and convert them to characters that lie within the repertoire of [ISO88591].
| Name Entity |
Number Entity |
Glyph |
Description |
| ∀ |
∀ |
∀ |
For All |
| ∂ |
∂ |
∂ |
Partial Differential |
| ∃ |
∃ |
∃ |
There Exists |
| ∅ |
∅ |
∅ |
Empty Set = Null Set = Diameter |
| ∇ |
∇ |
∇ |
Nabla = Backward Difference |
| ∈ |
∈ |
∈ |
Element Of |
| ∉ |
∉ |
∉ |
Not An Element Of |
| ∋ |
∋ |
∋ |
Contains As Member |
| ∏ |
∏ |
∏ |
N-Ary Product = Product Sign |
| ∑ |
∑ |
∑ |
N-Ary Sumation |
| − |
− |
− |
Minus Sign |
| ∗ |
∗ |
∗ |
Asterisk Operator |
| √ |
√ |
√ |
Square Root = Radical Sign |
| ∝ |
∝ |
∝ |
Proportional To |
| ∞ |
∞ |
∞ |
Infinity |
| ∠ |
∠ |
∠ |
Angle |
| ∧ |
∧ |
∧ |
Logical And = Wedge |
| ∨ |
∨ |
∨ |
Logical Or = Vee |
| ∩ |
∩ |
∩ |
Intersection = Cap |
| ∪ |
∪ |
∪ |
Union = Cup |
| ∫ |
∫ |
∫ |
Integral |
| ∴ |
∴ |
∴ |
Therefore |
| ∼ |
∼ |
∼ |
Tilde Operator = Varies With = Similar To |
| ≅ |
≅ |
≅ |
Approximately Equal To |
| ≈ |
≈ |
≈ |
Almost Equal To = Asymptotic To |
| ≠ |
≠ |
≠ |
Not Equal To |
| ≡ |
≡ |
≡ |
Identical To |
| ≤ |
≤ |
≤ |
Less-Than Or Equal To |
| ≥ |
≥ |
≥ |
Greater-Than Or Equal To |
| ⊂ |
⊂ |
⊂ |
Subset Of |
| ⊃ |
⊃ |
⊃ |
Superset Of |
| ⊄ |
⊄ |
⊄ |
Not A Subset Of |
| ⊆ |
⊆ |
⊆ |
Subset Of Or Equal To |
| ⊇ |
⊇ |
⊇ |
Superset Of Or Equal To |
| ⊕ |
⊕ |
⊕ |
Circled Plus = Direct Sum |
| ⊗ |
⊗ |
⊗ |
Circled Times = Vector Product |
| ⊥ |
⊥ |
⊥ |
Up Tack = Orthogonal To = Perpendicular |
| ⋅ |
⋅ |
⋅ |
Dot Operator |
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