Apr 20, 2016 · I am doing IGCSE Maths, and am having a few problems with function notation. I understand the form f(x) f (x). What does the form f: x ↦ y f: x ↦ y mean? Could you also give …

Nobody should be using ∋ ∋ to mean "such that"; it is used in texts everywhere to mean ∈ ∈ but in the reverse direction. (that's why the LaTeX code is "\ni" after all). I would argue ":" is the …

Mar 18, 2011 · What does := mean?where we are saying that the two sides are equal, but we are not defining "1" to be the expression " sin2(θ) +cos2(θ) sin 2 (θ) + cos 2 (θ) ". Basically, some …

The use of natural language is often more effective when presenting an idea. In my opinion the less often a symbol is used where a few words can go, the better. That said, there are many …

Nov 7, 2015 · What exactly does ≪ mean? I am familiar that this symbol means much less than. ...but what exactly does "much less than" mean? (Or the corollary, ≫) On Wikipedia, the …

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 · 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.

Aug 19, 2015 · The set of natural numbers {0, 1, 2, …} {0, 1, 2, …} is often denoted by ω ω. There are two caveats about this notation: It is not commonly used outside of set theory, and it might …

Dec 9, 2019 · When writing the domain of a function, in set builder notation, how does one correctly write the set of all real numbers? E.g. for f(x) = 3x + 2 f (x) = 3 x + 2, which of the …

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