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 5, 2011 · It's curious --and unfortunate-- that the symbol for emphasis became the symbol for negation. Granted, ASCII isn't the richest glyph set, and coders needed something, but why …

You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Upvoting indicates when questions and answers are useful. What's reputation and how do I …

What is the symbol ≙ most commonly used for in a mathematical or math-related context? LaTeX produces the symbol with \hateq. The symbol has Unicode codepoint U+2259. The respective …

Jun 25, 2014 · I have started seeing the "∈" symbol in math. What exactly does it mean? I have tried googling it but google takes the symbol out of the search.

Jun 23, 2015 · $\\mathbb Q$ is used to represent rational numbers. $\\mathbb R$ is used to represent reals. Is there a symbol or convention that represents irrationals. Possibly $\\mathbb …

The symbol $\mp$ only appears when there's already a $\pm$, but we want to establish a correspondence between opposite signs in an equation. Note that it's only a matter of style; …

Percent means 1 part of 100 or 1/100 and is indicated with %. Per mille means 1 part of 1000 or 1/1000 and is indicated with ‰, so it seems that these symbols indicate the mathematical …

Nov 27, 2022 · I just joined and need help understanding what all the different profile colors and symbols on the map. Is there a list of meanings on the site?

There is a common thread running through many of the mysteries and hints in the series—the mysterious symbol, (alleged) astronomical symbols, cannibalism, and the sign of the bird and …