Title of article
A note on Hempel–McMillan coverings of 3-manifolds
Author/Authors
Gَmez-Larraٌaga، نويسنده , , J.C. and Gonzلlez-Acuٌa، نويسنده , , F. and Heil، نويسنده , , Wolfgang، نويسنده ,
Issue Information
دوماهنامه با شماره پیاپی سال 2007
Pages
5
From page
1363
To page
1367
Abstract
Motivated by the concept of A -category of a manifold introduced by Clapp and Puppe, we give a different proof of a (slightly generalized) Theorem of Hempel and McMillan: If M is a closed 3-manifold that is a union of three open punctured balls then M is a connected sum of S 3 and S 2 -bundles over S 1 .
Keywords
Coverings of 3-manifolds with special open subsets , Lusternik–Schnirelmann category
Journal title
Topology and its Applications
Serial Year
2007
Journal title
Topology and its Applications
Record number
1581265
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