Surgery obstruction
id:
surgery-obstruction-311-16566608
title:
Surgery obstruction
text:
In mathematics, specifically in surgery theory, the surgery obstructions define a map θ : N → L n from the normal invariants to the L-groups which is in the first instance a set-theoretic map with the following property when n ≥ 5 : A degree-one normal map : M → X is normally cobordant to a homotopy equivalence if and only if the image θ = 0 in L n .
brand slug:
wiki
category slug:
encyclopedia
description:
Map from the normal invariants to the L-groups
original url:
https://en.wikipedia.org/wiki/Surgery_obstruction
date created:
date modified:
2023-02-02T02:13:39Z
main entity:
{"identifier":"Q7646196","url":"https://www.wikidata.org/entity/Q7646196"}
image:
fields total:
13
integrity:
14