“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	Deduction deduction DeductionsAreDelta1 deductions are Δ_1 DeductionTheorem deduction theorem DeductionTheoremHoldsForClassicalPropositionalLogic deduction theorem holds for classical propositional logic DeductionTheoremHoldsForFirstOrderLogic deduction theorem holds for first order logic DeductionTheoremHoldsForIntuitionisticPropositionalLogic deduction theorem holds for intuitionistic propositional logic DeductiveSystem deductive system Defect defect DefectTheorem defect theorem Deficiency deficiency DeficientNumber deficient number Definable definable DefinableType

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