Exotic sphere

In differential topology, an exotic sphere is a differentiable manifold M that is homeomorphic but not diffeomorphic to the standard Euclidean n-sphere. That is, M is a sphere from the point of view of all its topological properties, but carrying a smooth structure that is not the familiar one (hence the name "exotic").

单词	Exotic sphere
释义	Exotic sphere 英语百科 Exotic sphere In differential topology, an exotic sphere is a differentiable manifold M that is homeomorphic but not diffeomorphic to the standard Euclidean n-sphere. That is, M is a sphere from the point of view of all its topological properties, but carrying a smooth structure that is not the familiar one (hence the name "exotic").
随便看	upright method的意思 upright method of hull section construction的意思 upright mounting的意思 uprightness的意思 upright的意思 upright of a boring machine的意思 upright of frame的意思 upright of wagon的意思 upright perception的意思 upright Peripheral plasma renin activity的意思 upright Perpheral plasma renin activity的意思 upright piano的意思 upright piano的意思 upright piano的意思 upright picking shaft的意思 upright picture的意思 upright pile的意思 upright plant的意思 Upright position的意思 upright post的意思 upright postion的意思 Upright posture的意思 upright projection的意思 upright pump的意思 upright pyramid pattern的意思