( ot\approx ), usually to indicate that numbers are not approximately equal (1 2). ( \approx ), usually to indicate approximation between numbers, like. Sometimes, when testing whether the solution to a task (for example, here on Rosetta Code) is correct, the difference in floating point calculations between. 4 LaTeX symbols Symbols used in LaTeX markup. The following list of mathematical symbols by subject features a selection of the most common symbols used in modern mathematical notation within formulas, grouped by mathematical topic. In Mathematica version 5 and earlier these functions live in the Experimental` context and are well documented: $EqualTolerance, $SameQTolerance. Another approximation symbol is the double-tilde, meaning 'approximately equal to', 5 7 8 the critical difference being the subjective level of accuracy: indicates a value which can be considered functionally equivalent for a calculation within an acceptable degree of error, whereas is usually used to indicate a larger, possibly sign. The approximately equals sign,, was introduced by British mathematician Alfred Greenhill. Equal ( ), Unequal ( ) numerical equality SameQ ( ), UnsameQ ( ) literal symbolic identity Less ( <) Greater ( >) LessEqual ( <) GreaterEqual ( >) Between Logical Combinations And ( &) Or ( ) Not () True False.ReplaceAll rules represents an operator form of ReplaceAll that can be applied to an expression. Thanks to recent post on the official newsgroup by Oleksandr Rasputinov, now I have learned two undocumented functions which control the tolerance of Equal and SameQ: $EqualTolerance and $SameQTolerance. rules or ReplaceAll expr, rules applies a rule or list of rules in an attempt to transform each subpart of an expression expr.
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