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. At least, …

Feb 14, 2017 · 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 …

Aug 2, 2017 · The approximation gets potentially worse when repeated, but just a couple of steps is no big issue in this context. It is important to tell your students explicitly and repeatedly that $$ …

Apr 12, 2016 · I have been wondering for a long time whether there is a unequivocal way to define and use the symbols commonly adopted for an approximate equality between two quantities. I am a …

Dec 16, 2018 · It’s not exactly equal, so the correct symbol to use is $\approx$, not $ = $. You could use $ = $, but only when you use $\pi$ rather than its decimal approximation.

Jul 28, 2010 · I don't see anywhere on the Wikipedia page you linked to where it recommended writing $\pi \fallingdotseq 3.14\ldots.$ It says that $\fallingdotseq$ means "asymptotically equal to," which is …

Sep 27, 2021 · Why is the approximation symbol " $\approx$ " used in universal algebra instead of "is equal to" symbol? Example: Bergman´s book "Universal Algebra: Fundamentals and Selected …

Aug 16, 2017 · Like P. Siehr, I would use $\approx$ for what you want to say: that a given number is approximately equal to another (usually rounded) number. In my experience the main mathematical …

Sep 28, 2013 · The symbol U+2248 “≈” denotes, according to the standard, the relation “is approximately equal to”. This is an intentionally vague relation; the standard adds: “It depends on the …

Approximation is precisely what you are doing, after all. If they were exact in meaning and measure we would not use the approximation symbol but the equality symbol.