Character Entities - HTML and CSS: The Complete Reference - page 746

Mathematical Operators

Numbered
Entity

Unicode
Entity

Intended
Rendering Named Entity Description Notes

∀

∀ ∀ ∀ For all No support pre-IE8

∂ ∂ ∂ ∂ Partial differential

∃ ∃ ∃ ∃ There exists No support pre-IE8

∅ ∅ ∅ ∅ Empty set, null

set, diameter

No support pre-IE8

∇

∇ ∇ ∇ Nabla, or

backward
difference

No support pre-IE8

∈ ∈ ∈ ∈ Element of No support pre-IE8

∉

∉ ∉ ∉ Not an element of No support pre-IE8

∋ ∋ ∋ ∋ Contains as

member

No support pre-IE8

∏ ∏ ∏ ∏ N-ary product, or

product sign

∑ ∑ ∑ ∑ N-ary summation

− − − - Minus sign

∗ ∗ ∗ ∗ Asterisk operator No support pre-IE8

√ √ √ √ Square root,

radical sign

∝ ∝ &#x221D ∝ Proportional to No support pre-IE8

∞ ∞ ∞ ∞ Infinity

∠

∠ ∠ ∠ Angle No support pre-IE8

∧ ∧ ∧ ∧ Logical and No support pre-IE8

∨ ∨ ∨ ∨ Logical or No support pre-IE8

∩ ∩ ∩ ∩ Intersection, cap

∪

∪ ∪ ∪ Union, cup No support pre-IE8

∫ ∫ ∫ ∫ Integral

∴ ∴ ∴ ∴ Therefore No support pre-IE8

∼ ∼ ∼ ∼ Tilde operator No support pre-IE8

≅

≅ ≅ ≅ Approximately

equal to

No support pre-IE8

≈ ≈ ≈ ≈ Almost equal to,

asymptotic to