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 ?

Nov 10, 2021 · 知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专 …

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.

Sep 3, 2022 · Original source of "precise" ε-δ (epsilon-delta) formal definition of a limit? Ask Question Asked 3 years, 5 months ago Modified 3 years, 5 months ago

Sep 18, 2020 · 这个表格的实用价值在于提供了一套系统的“翻译”规则。 在分析证明中，当直接论证 S₀ 的结论受阻时，数学家可以转而证明其对应的、更易处理的 S_ {\epsilon} 版本。

Sep 30, 2025 · The thing we're trying to prove starts with $\forall\epsilon>0 \ \exists\delta>0,$ so all we need to do is make sure we know how to find one suitable value of $\delta$ no matter what the value …

假设epsilon取0.1，表达式2中应该相等的被判为不等了，错！ 假设epsilon取0.2，表达式1中应该不等的被判为相等了，错！ 假设epsilon取0.15，表达式1中应该不等的被判为相等了，表达式2中应该相等 …

Jun 20, 2023 · This quote resonates with my current dilemma. Does the Epsilon-Delta definition truly capture the essence of what we mean by a 'limit'? though the epsilon-delta definition is a …

Sep 9, 2018 · 无穷小量和 epsilon 的关系是什么? 好多文章都说柯西对极限的定义巧妙绕过了无穷小量，但我感觉这种定义方式就是用 [公式] 代替了无穷小的定义，柯西所谓的“要多小有多小并且大于0的 …