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 Operators B...

Dec 22, 2020 · I have encountered this when referencing subsets and vector subspaces. For example, T ⊊ span(S) should mean that T is smaller than span(S)--at least from what I've gathered. Is ⊊ a sort of …

Mar 3, 2019 · Whats the meaning of this symbol? Its a three dot symbol: ∴ I read a book, im could not find any definition of this symbol. This is about continuum property of the natural numbers and the …

May 6, 2015 · The meaning of various equality symbols Ask Question Asked 10 years, 7 months ago Modified 9 years, 7 months ago

I have read that an infinitesimal is very small, it is unthinkably small but I am not quite comfortable with with its applications. My first question is that is an infinitesimal a stationary value?...

Apr 28, 2012 · After looking at the Wikipedia article on topological space, I still cannot grasp intuitively what topological space is. For example, if we are to define topology on real numbers, can there be …

Feb 19, 2015 · It's an abbreviation of quod erat demonstrandum, which is the Latin translation of a Greek phrase meaning "which had to be proven". To the ancient Greeks, a proof wasn't complete …

What is the meaning of N0 N 0? To put it into context, I have in my notes, f(k) f (k), k∈ N0 k ∈ N 0 is a continuous function on [−π,π] [π, π]. How is it different to saying k∈ N k ∈ N?

Jul 1, 2022 · Textbook Notation: Meaning of cf. [closed] Ask Question Asked 3 years, 5 months ago Modified 3 years, 5 months ago

Mar 25, 2021 · So I'm just getting into topology and I see spaces such as $S^1$ or $S^2$ used a lot. What is the meaning of $S^1$ or $S^2$? Furthermore, what is meant by the ...