Mar 18, 2011 · $\begingroup$ I was aware of Pascal using :=, but not the others.I think it is possible that the language designers of that time where influenced by maths (as has …

Apr 20, 2016 · the notation $\mapsto$ ("maps to", an arrow with a bar at its tail) ... There is another arrow-symbol, which also used for mapping $\rightarrow$, which might be a bit …

A better, but less common, notation is $\varepsilon$ (formatted with $\varepsilon$). You can find answers and comments related to that latter symbol $\varepsilon$ in the linked posts. You can …

Nov 7, 2015 · What exactly does this notation in an old letter mean? Hot Network Questions I need a standard way of expressing as a wildcard expression a set of subdirectories of a top …

They are integral parts of larger notations which don't have any individual formal meaning -- the fact that expressing the entire notation in English sometimes involves saying "such that" …

In mathematical notation, what are the usage differences between the various approximately-equal signs "≈", "≃", and "≅"? The Unicode standard lists all of them inside the Mathematical …

Jun 25, 2014 · Another possible notation for the same relation is {\displaystyle A\ni x,} A\ni x, meaning "A contains x", though it is used less often. The negation of set membership is …

Aug 19, 2015 · There are two caveats about this notation: It is not commonly used outside of set theory, and it might not be recognised by non-set-theorists. In "everyday mathematics", the …

How does this notation using theta mean a line or linear function? 1. What does $\mathbb{R}_0^+$ mean? 3.

Dec 13, 2016 · An unsophisticated question from a neophyte: Given the numbers: $1,2,3,4,5$ What is the symbol for the range of the numbers? i.e. the lowest-highest number in the set. …