The symbol ≅ is used for isomorphism of objects of a category, and in particular for isomorphism of categories (which are objects of CAT). The symbol ≃ is used for equivalence of categories. …

Mar 18, 2011 · I have seen variants of these used by people who predate widespread knowledge of computer programming. It would be interesting to know the earliest uses of a special symbol …

' $\to$ ' (or ' $\supset$ ') is a symbol belonging to various formal languages (e.g. the language of propositional logic or the language of the first-order predicate calculus) to express [usually, but …

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 …

Sep 7, 2016 · Note, IF you do such a thing, make SURE that the expression and it's symbol is LOGICAL, WELL NAMED, and EXPLAINED, and post the symbol with name and explanation …

May 14, 2019 · The logical "or" is $\vee$; however, unless you are doing mathematical logic like set theory, that symbol is not widely used, because it is usually unnecessary and the work …

May 19, 2016 · Not equal to is an accepted mathematical symbol - so would this be acceptable: $\not>$? I was searching around but I couldn't find any qualified sites that would point me in …

Jun 3, 2015 · $\begingroup$ Ah. I think this would be a better place to do that. Also, note that you don't actually have to submit your answer (or question) to see how it will format - this site does …

The Symbol is just to let you know that something is going on with the Power System on the Watch. There are a couple Links in the Posts that explain the different colors and Symbols. All …

Feb 9, 2014 · Does it sometimes denote, in measurement theory; often the qualitative counterpart to $\geq $ in the numerical representation; when one wants to numerically represent a totally …