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 
Nary product, or product sign 
∑ 
∑ 
IE: 4, 5, 5.5, 6
N: 6, 7 
∑ 
∑ 
IE: 4, 5, 5.5, 6
N: 6, 7 
Nary 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 
Lessthan or equal to 
≥ 
≥ 
IE: 4, 5, 5.5, 6
N: 6, 7 
≥ 
≥ 
IE: 4, 5, 5.5, 6
N: 6, 7 
Greaterthan 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 
