# Mathematical operators

Below is a table of mathematical operator character codes with both names and entity codes for each. Also in the table is an indication of which browsers each of the entity codes work for (the name codes don't always work when the entity codes do). A key is provided below the table if you don't understand the browser selection.

Entity | Name | Description | Example | ||||||
---|---|---|---|---|---|---|---|---|---|

∀ | ∀ | For all | ∀ | ||||||

∂ | &oart; | Partial differential | ∂ | ||||||

∃ | ∃ | There exists | ∃ | ||||||

∅ | ∅ | Empty set, null set, diameter | ∅ | ||||||

∇ | ∇ | Nabla, backward differential | ∇ | ||||||

∈ | ∈ | Element of, is in set | ∈ | ||||||

∉ | ∉ | Not an element of, not in set | ∉ | ||||||

∋ | ∋ | Contains as member | ∋ | ||||||

∏ | ∏ | N-ary product, product sign | ∏ | ||||||

∑ | ∑ | N-ary summation | ∑ | ||||||

− | − | Minus sign | − | ||||||

∗ | ∗ | Asterisk operator | ∗ | ||||||

√ | √ | Square root, radical sign | √ | ||||||

∝ | ∝ | Proportional to | ∝ | ||||||

∞ | ∞ | Infinity | ∞ | ||||||

∠ | ∠ | Angle | ∠ | ||||||

∩ | ∩ | Intersection, cap | ∩ | ||||||

∪ | ∪ | Union, cup | ∪ | ||||||

∫ | ∫ | Integral | ∫ | ||||||

∴ | ∴ | Therefore | ∴ | ||||||

∼ | ∼ | Tilde operator | ∼ | ||||||

≅ | ≅ | Aproximately equal to, congruency | ≅ | ||||||

≈ | ≈ | Almost equal to, asymptotic to | ≈ | ||||||

≠ | ≠ | Not equal to | ≠ | ||||||

≡ | ≡ | Identical to, equivalency | ≡ | ||||||

≤ | ≤ | 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 | ⊗ | ||||||

⊥ | ∧ or ⊥ | Logical and, perpendicular | ⊥ | ||||||

⊦ | ∨ | Logical or | ⊦ | ||||||

⋅ | ⋅ | Dot operator | ⋅ |

## Key to table

The browser icons are explained in the below list:

= Microsoft Internet Explorer 6+

= Netscape Communicator 4

= Mozilla and Netscape Navigator 6+

= Opera 6+

= MSN TV (aka. WebTV)

= Konqueror 3.0+

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http://webpageworkshop.co.uk/main/maths_characters

Last updated: 27th May, 2003

http://webpageworkshop.co.uk/main/maths_characters

Last updated: 27th May, 2003