Symbols - Mathematical Symbols
| + | plus/add | 
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denotes an operation | 
| - | minus/subtract | 
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angle | 
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divide | 
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parallel | 
| / | divide | 
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congruent | 
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multiply/times | 
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perpendicular | 
| . | multiply/times, scalar product of vectors | 
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intersection | 
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is equal to | 
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union | 
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is identically equal to, defined as | 
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subset | 
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does not equal | 
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is not a subset | 
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is approximately equal to | 
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belongs to | 
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is greater than | 
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does not belong to | 
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is greater than or equal to | 
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empty set | 
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is much greater than | 
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cardinality | 
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is less than | 
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finite difference or increment | 
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is less than or equal to | 
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colon | 
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is much less than | 
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semicolon | 
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plus or minus, error margin | % | per cent | 
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minus or plus | ' | first derivative, feet, arcminutes | 
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complex set | " | second derivative, inches, arcseconds | 
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integer set | ° | degrees | 
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natural set | 
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difference | 
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rational set | 
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ellipsis | 
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real set | 
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is equivalent to | 
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is to, ratio, such that | 
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implies | 
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as | iff | if, and only if | 
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therefore | 
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factorial | 
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because | 
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infinity | 
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for all | 
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integral | 
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there exists | 
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imaginary part of a complex number | 
| { } | set | 
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real part of a complex number | 
| < > | mean | 
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maps into, approaches the limit | 
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(square) root of | 
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the sum of the terms indicated (sigma) | 
| ( ) | parentheses | 
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the product of the terms indicated (pi) | 
| [ ] | brackets | 
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is proportional to | 
| { } | braces | 
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vector differential |