View question - ≈ vs. ~ --- Which symbol is more correct to use?
2017年2月14日 · 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 be considered functionally equivalent for a calculation within an acceptable degree of error, whereas ~ is usually used to indicate a larger, possibly ...
What is the Versus symbol? - Mathematics Stack Exchange
2018年3月23日 · There is no commonly used symbol for versus of which I'm aware. What you're asking for seems closest to some usage of the exclusive OR symbol (i.e XOR, $\oplus$), but I don't think that works here, as you seem to be looking for one number or the other, not a logical output. You could use a vector equation to have both numbers present
Difference between "≈", "≃", and "≅" - Mathematics Stack Exchange
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, this is the convention used in this book and by most category theorists, although it is far from universal in mathematics at large.
notation - What does := mean? - Mathematics Stack Exchange
2011年3月18日 · 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 for this (and what symbols were chosen). An advantage of $:=$ is that it has a partner, $=:$, allowing it to distinguish which side is equal to the other by definition.
What is the difference between plus-minus and minus-plus?
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; we could dispose completely of $\mp$ and used $\pm -$ instead, e.g., $\cos (x \pm y) = \cos x \cos y \pm (- \sin x \sin y)$.
Difference between $⊂$ and $⊆$? - Mathematics Stack Exchange
2018年10月3日 · A comment points out that if the author uses two different symbols that implies the author wants the symbols to mean two different things. And by convention I) there is no symbol $\subseteq$ so it's reasonable that the author is using connvention II). Which makes me think further about my opinion of which convention I prefer.
logic - What is the difference between ⊢ and ⊨? - Mathematics …
when proving question got double turnstile symbol. 2. Natural deduction technique/question. Related. 0.
Implies ($\\Rightarrow$) vs. Entails ($\\models$) vs. Provable …
The distinction is less strong than object‑level / meta‑level distinction, this is a domain distinction. Comparing “$\vdash$ vs $\Rightarrow$” to “$\Rightarrow$ vs $\rightarrow$” is a bit like comparing explicit type conversion to implicit type conversion… a comparison to be used with a lot of care, that's just to give a picture.
The difference between ∈ and ⊂ - Mathematics Stack Exchange
2017年10月7日 · $\subset$ is the symbol for subset .For eg. one set can be a subset of another set if all elements of that set is included in the later set. You must be careful on what you are applying $\in$ or $\subset$.
What is the meaning of the double turnstile symbol
2014年11月22日 · $\vdash$-the turnstile symbol denotes syntactic implication (syntactic here means related to syntax, the structure of a sentence), where the 'algebra' of the logical system in play (for example sentential calculus) allows us to 'rearrange and cancel' the stuff we know on the left into the thing we want to prove on the right.