Metric Spaces

Metric spaces 度量空间 及相关的一些知识点 Definition 6.1.5 (Convergence of sequences). Let ε > 0 be a real number, and let L be a real number. A sequence  of real numbers is said to be ε-close to L iff an is ε-close to L for every n ≥ N, i.e., we have |an − L| ≤ ε… read more »