“SecondCountabilityIsHereditary”的概念、定义、习题解题方法及翻译-数学辞典

单词	SecondCountabilityIsHereditary
释义	second countability is hereditary Suppose $X$ is a second countable topological space and $A$ is asubset in $X$ . Then $A$ (when equipped with the subspace topology)is also second countable.
随便看	long exact sequence (locally trivial bundle) LongExactSequenceofHomologyGroups long exact sequence (of homology groups) LongLine long line LookAndSaySequence look and say sequence Loop loop loop Loop1 LoopAlgebra loop algebra LoopAndQuasigroup loop and quasigroup LoopSpace loop space LoopTheorem Loop theorem loop theorem LoopTheorem12 LorenzEquation Lorenz equation LosanitschsTriangle Losanitsch’s triangle

数学辞典收录了18232条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。

second countability is hereditary