Talk:Mapping cylinder
Latest comment: 6 months ago by 2404:4408:4A1A:EE00:9CD:330C:402D:FD82 in topic Deformation Retraction R
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Not correct
edita minor point: "no two points (x,t) in X x I equivalent" is not correct if f is not injective. Thus we need a reformulation of the equivalence relation. - Saibot2 16:19, 6 February 2007 (UTC)
Deformation Retraction R
editShouldn't we have:
![{\displaystyle ([t,x],s)\mapsto [(1-s)\cdot t,x],(y,s)\mapsto y}](https://wikimedia.org/api/rest_v1/media/math/render/svg/e19db21f4313b24498024b757773bd901c05501f)
Or does this not matter/have I got something wrong? 2404:4408:4A1A:EE00:9CD:330C:402D:FD82 (talk) 20:43, 3 April 2024 (UTC)