Mathematics – Geometric Topology
Scientific paper
1997-12-04
Geom. Topol. 1 (1997), 21-40
Mathematics
Geometric Topology
20 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTVol1/paper3.abs.html
Scientific paper
We describe a new approach to the canonical decompositions of 3-manifolds along tori and annuli due to Jaco-Shalen and Johannson (with ideas from Waldhausen) - the so-called JSJ-decomposition theorem. This approach gives an accessible proof of the decomposition theorem; in particular it does not use the annulus-torus theorems, and the theory of Seifert fibrations does not need to be developed in advance.
Neumann Walter D.
Swarup Gadde A.
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