“SphereTheorem”的概念、定义、习题解题方法及翻译-数学辞典

单词	SphereTheorem
释义	sphere theorem Theorem 1 (sphere theorem). If $M$ is a differentiable orientable 3-manifold such that $\\pi_{2}(M)$ is not trivial, then there exists an embedding $S^{2}\\to M$ such that its image homotopy class is not equal to zero. This theorem was established and proved by C. Papakyriakopoulos in 1957.
随便看	Myhill-Nerode theorem for semigroups Möbius circle transformation theorem Möbius function Möbius inversion Möbius strip Möbius transformation Möbius transformation cross-ratio preservation theorem Nabla nabla NablaActingOnProducts nabla acting on products NagaosTheorem Nagao’s theorem NagellLutzTheorem Nagell-Lutz theorem Naive van Kampen NakayamasLemma Nakayama’s lemma NapoleonsTheorem Napoleon’s theorem NashEquilibrium Nash equilibrium NashIsometricEmbeddingTheorem Nash isometric embedding theorem NationalScienceFoundation

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。

sphere theorem