希腊字母epsilon的两种写法ϵ，ε，一般认为哪个是原型，哪个是变体？ 我一直以为前者是原型，因为TeX中两者分别记为\epsilon，\varepsilon 但在Microsoft Word的数学公式输入器中却将两者分别… …

This letter "$\\varepsilon$" is called epsilon right ? What does it signify in mathematics ?

Apr 19, 2022 · However, note that $\epsilon$ is most commonly used in analysis as an arbitrarily small (but positive) value. If you are new to the idea of an $\epsilon$ -neighborhood, check out this post.

Nov 18, 2021 · I'm really doing my best but completely failing to understand the epsilon-delta definition of a limit. I vaguely understand it like this: Given a bound on the difference between the input and …

Jun 21, 2018 · The epsilon algebra is a simple method compared to the more advanced interval arithmetic which can be used to put bounds on rounding and measurement errors in computation. …

Sep 3, 2022 · Original source of "precise" ε-δ (epsilon-delta) formal definition of a limit? Ask Question Asked 3 years, 3 months ago Modified 3 years, 3 months ago

The epsilon-delta definition of continuity has the advantage that it could be seen as an intermediate step in generalizing the concept of a continuous map to more general spaces where you can't define a …

Dec 24, 2010 · What does the $\\ni$ (backwards element of) symbol mean? It doesn't appear in the Wikipedia list of mathematical symbols, and a Google search for "backwards element of" or …

I find the presentation of the $\epsilon$-$\delta$ definition as a game tends to help beginning students: the players are Paul the prover, and Alice the adversary.

Mar 22, 2018 · I think your proof is equivalent, but it just doesn't follow the typical order of $\epsilon$-$\delta$ -proof. In $\epsilon$-$\delta$ proof one discovers what $\delta$ one needs, by "looking in …