  Glossary - Symbols

One or more symbols are used to express mathematical formulae.  A partial list of symbols (currently being developed) is as follows:

 Symbols Meanings + positive, addition - negative, subtraction × mutliplication ÷ division * asterisk, multiplcation (computers) / slash, forward slash, division (computers) ⁄ fractional slash ± plus and minus (value can be of either sign) ° degree, angle ≡ identical to = equal sign < less than <= =< less than or equal to > greater than >= => greater than or equal to ≈ approximately equal to % per cent (n out of 100 parts) ‰ per mille (n out of 1,000 parts) ‱ per myriad (n out of 10,000 parts), per diem, basis point ¤ Currency (but not a specific currency) # octothorpe, number sign, cross-hatch ( ) opening and closing parenthesis (respectively), brackets ƒ florin, function π pi (the constant ratio of the circumference of a circle to its diameter) √ square root, radical sign ∞ infinity … horizontal ellipsis ′ imperial feet, minutes, [single] prime (not an apostrophe) ″ imperial inches, seconds, double prime (not a quotation mark)

Advanced mathematical operators:

 Symbols Meanings ∀ for all ∂ partial differential ∝ proportional to... ∇ nabla, backward difference ∏ n-ary product, product sign, prod (not the same as the Greek capital letter for "pi" despite its similar appearance) ∑ n-ary sumation, sum (not the same as the Greek capital letter for "sigma" despite its similar appearance) − minus sign, subtraction ∗ asterisk operator ∠ angle ∟ right angle ⊥ up tack, orthogonal to, perpendicular ∧ logical "and," wedge ∨ logical "or," vee ∫ integral ∆ increment ∴ therefore ∼ tilde operator, varies with, similar to (not the same as the "tilde" character despite its similar appearance) ≈ almost equal to, asymptotic to ≅ approximately equal to ≡ identical to ≤ less-than or equal to ≥ greater-than or equal to ≠ not equal to ∩ intersection, cap ∪ union, cup ⊂ subset of ⊃ superset of ⊄ not a subset of ⊆ subset of or equal to ⊇ superset of or equal to ∈ element of ∉ not an element of ∋ contains as member, ni (as in Monty Python's The Knights of "Ni") ∃ there exists ∅ empty set, null set, diameter ⊕ circled plus, direct sum ⊗ circled times, vector product ¬ not ⋅ dot operator (not the same as the Georgian comma, a.k.a., "middle dot," despite its similar appearance)             Your IP address is:  18.232.124.77