Signs and Symbols
| + | addition, plus, positive |
| - | subtraction, minus, negative |
| a times b, multiplication |
| a divided by b, division |
| = | equal to |
 | approximately equal to |
| a ~ b | a is similar to b, of the order of |
 | congruent to |
 | not equal to |
 | identical to |
| a < b | a is less than b |
| a > b | a is greater than b |
a  b | a is less than or equal to b |
a  b | a is greater than or equal to b |
a  b | a is proportional to b |
| % | percent |
| : | ratio of |
| x to the power of n |
 | infinity |
 | perpendicular to |
| || | parallel to |
Subjects: Chemistry Mathematics Physics