Title	Spines for spineless 4-manifolds
Creator	Ruberman, Daniel
Publisher	Banff International Research Station for Mathematical Innovation and Discovery
Date Issued	2019-11-07T09:01
Description	A recent paper of Levine-Lidman gives examples of simply connected 4-manifolds $X$, homotopy equivalent to a 2-sphere, that do not admit PL spines. In other words, there is no PL (not necessarily locally flat) embedded sphere in $X$ that is a strong deformation retract of $X$. I will show that a family of the Levine-Lidman examples admit a topological spineâ a locally PL sphere that is a strong deformation retract of $X$. This is joint work with Hee Jung Kim.
Extent	53.0 minutes
Subject	Mathematics; Manifolds And Cell Complexes
Type	Moving Image
File Format	video/mp4
Language	eng
Notes	Author affiliation: Brandeis University
Series	BIRS Workshop Lecture Videos (Banff, Alta)
Date Available	2020-05-06
Provider	Vancouver : University of British Columbia Library
Rights	Attribution-NonCommercial-NoDerivatives 4.0 International
DOI	10.14288/1.0390365
URI	http://hdl.handle.net/2429/74345
Affiliation	Non UBC
Peer Review Status	Unreviewed
Scholarly Level	Faculty
Rights URI	http://creativecommons.org/licenses/by-nc-nd/4.0/
Aggregated Source Repository	DSpace

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