HTML XHTML The Complete Reference
(X)HTML Elements
CSS Properties


Element Test Support Code Test Support Description
∀ N: 6 ∀ N: 6, 7 For all
∂ IE: 4, 5, 5.5, 6
N: 6, 7
∂ IE: 4, 5, 5.5, 6
N: 6, 7
Partial differential
∃ N: 6, 7 ∃ N: 6, 7 There exists
∅ N: 6, 7 ∅ N: 6, 7 Empty set, null set, diameter
∇ N: 6, 7 ∇ N: 6, 7 Nabla, or backward difference
∈ N: 6, 7 ∈ N: 6, 7 Element of
∉ N: 6, 7 ∉ N: 6, 7 Not an element of
∋ N: 6, 7 ∋ N: 6, 7 Contains as member
∏ IE: 4, 5, 5.5, 6
N: 6, 7
∏ IE: 4, 5, 5.5, 6
N: 6, 7
N-ary product, or product sign
∑ IE: 4, 5, 5.5, 6
N: 6, 7
∑ IE: 4, 5, 5.5, 6
N: 6, 7
N-ary summation
− IE: 4, 5, 5.5
N: 6, 7
O: 4, 5, 6
− IE: 4, 5, 5.5
N: 6, 7
O: 4, 5, 6
Minus sign
∗ N: 6, 7 ∗ N: 6, 7 Asterisk operator
√ IE: 4, 5, 5.5, 6
N: 6, 7
√ IE: 4, 5, 5.5, 6
N: 6, 7
Square root, radical sign
∝ N: 6, 7 ∝ N: 6, 7 Proportional to
∞ IE: 4, 5, 5.5
N: 6
∞ IE: 4, 5, 5.5
N: 6
Infinity
∠ N: 6, 7 ∠ N: 6, 7 Angle
∧ N: 6, 7 ⊥ N: 6, 7 Logical and
∨ N: 6, 7 ⊦ N: 6, 7 Logical or
∩ IE: 4, 5, 5.5, 6
N: 6, 7
∩ IE: 4, 5, 5.5, 6
N: 6, 7
Intersection, cap
∪ N: 6, 7 ∪ N: 6, 7 Union, cup
∫ IE: 4, 5, 5.5, 6
N: 6, 7
∫ IE: 4, 5, 5.5, 6
N: 6, 7
Integral
∴ N: 6, 7 ∴ N: 6, 7 Therefore
∼ N: 6, 7 ∼ N: 6, 7 Tilde operator, varies with, similar to
≅ N: 6, 7 ≅ N: 6, 7 Approximately equal to
≈ IE: 4, 5, 5.5, 6
N: 6, 7
≈ IE: 4, 5, 5.5, 6
N: 6, 7
Almost equal to, asymptotic to
≠ IE: 4, 5, 5.5, 6
N: 6, 7
≠ IE: 4, 5, 5.5, 6
N: 6, 7
Not equal to
≡ IE: 4, 5, 5.5, 6
N: 6, 7
≡ IE: 4, 5, 5.5, 6
N: 6, 7
Identical to
≤ IE: 4, 5, 5.5, 6
N: 6, 7
≤ IE: 4, 5, 5.5, 6
N: 6, 7
Less-than or equal to
≥ IE: 4, 5, 5.5, 6
N: 6, 7
≥ IE: 4, 5, 5.5, 6
N: 6, 7
Greater-than or equal to
⊂ N: 6, 7 ⊂ N: 6, 7 Subset of
⊃ N: 6, 7 ⊃ N: 6, 7 Superset of
⊄ N: 6, 7 ⊄ N: 6, 7 Not a subset of
⊆ N: 6, 7 ⊆ N: 6, 7 Subset of or equal to
⊇ N: 6, 7 ⊇ N: 6, 7 Superset of or equal to
⊕ N: 6, 7 ⊕ N: 6, 7 Circled plus, direct sum
⊗ N: 6, 7 ⊗ N: 6, 7 circled times, vector product
⊥ N: 6, 7 ⊥ N: 6, 7 Up tack, orthogonal to, perpendicular
⋅ N: 6, 7 ⋅ N: 6, 7 dot operator



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