The approximation sign "≈" I use for decimal approximations with tilde "~" being a rougher approximation. Tilde "~" I use to state a geometric shape is similar to another one ie a triangle of sides 3/4/5 is similar to a triangle with sides 30/40/50.

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 ...

2017年6月29日 · I suppose similarity is an equivalence relation. $\equiv$ is "equivalent to" and appears in regularly in modular arithmetic. $\approx$ is aproximately. $\cong$ is congruence or isomorphism. And of course $=$ is equality. $\endgroup$ –

There is no universally accepted notation, but $\approx$ and $\simeq$ both generally mean "approximately equal to." However $\simeq$ is sometimes used to denote "is similar," for instance that two triangles are similar ($\triangle ABC \simeq \triangle DEF$). You would rarely, if ever, use $\approx$ in that situation.

2018年12月16日 · Take an unending number, say e.g $π$. If we want to show $π$'s value, should we use the approximately notation or equal sign when writing: $π = 3.14...$ or $π ≈ 3.14...$ This might be a really s...

2015年6月23日 · The use of an equal sign is probably because of a bad textbook, or that the writers used it because the rounded answer is very close to the real answer. This is usually the case when the answers are off by less than $\pm \epsilon$, which is determined by the writers (usually $10^{-4}$)

2010年7月28日 · $\begingroup$ 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 a different kind of approximation.

2017年8月2日 · I have a question regarding the placement of the almost equal to sign in relation to the equal to sign. For example, can I write: $$129{.}87\cdot 6\approx 130 \cdot 6 = 780 $$ or is it more correct to write: $$129{.}87\cdot 6\approx 130 \cdot 6 \approx 780 $$ since $129{.}87\cdot 6$ is not equal to the approximation $780$?

2013年9月28日 · The notation $\cong$ corresponds to U+2245 APPROXIMATELY EQUAL TO “≅”, and $\approx$ corresponds to U+2248 ALMOST EQUAL TO “≈”. However, the Unicode names, written in all uppercase, are rather misleading here; and the names are really symbolic identifiers rather than normal names.

2016年4月12日 · Example $$\pi \approx 3,14.$$ We prefer $\approx$ to $\simeq$ since $\simeq$ denotes often an isomorphism (for example between two groups, two rings). In conclusion, the difference between these symbols is made thanks to the mathematical objects for which there are defined. Functions : $\sim$ Numbers : $\approx$