Approximate units are used to verify that two-sided closed ideals of C$^\ast$-algebras are C$^\ast$-algebras themselves. Thus quotients of C$^\ast$-algebras are C$^\ast$-algebras as …

$\begingroup$ @Lucian I always took for granted that the "approximately" qualifier acted idempotently, so while we can distinguish between 'exact equality' and 'approximate equality', …

To approximate something is simply to represent it with something else that is good enough for your purpose. Numbers are not the only things that can be approximated. One can, for …

The idea of it is very simple, and it answers your last question. Basically, to approximate the location of a root of a function, we approximate the function locally by its tangent, find the …

Aug 12, 2015 · To indicate approximate equality, one can use ≃, ≅, ~, ♎, or ≒. I need to indicate an approximate inequality. Specifically, I know A is greater than a quantity of approximately B. …

Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their …

Aug 15, 2016 · Given that distribution's variance is ${\tfrac {s^{2}\pi ^{2}}{3}}$, the logistic distribution can be scaled to approximate the normal distribution by multiplying its variance …

Jul 7, 2017 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …

Dec 12, 2018 · The interest of the Riemann-Siegel formula (and the approximate functional equation) is that alternative evaluations of $\,\zeta(s)\,$ using the finite sum …

A continuous linear operator is not invertible if it is not bounded from below, and since the spectrum consists of the $\lambda$ such that $ T- \lambda I$ is not injective, approximate …