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math.GT2001
A proof of a homeomorphism theorem of Waldhausen
Siddhartha Gadgil, Gadde A. Swarup
We give a short proof of Waldhausen's homeomorphism theorem for orientable Haken 3-manifolds.
math.GT2001
Canonical splittings of groups and 3-manifolds
Peter Scott, Gadde Swarup
We introduce the notion of a `canonical' splitting over Z or ZxZ for a finitely generated group G. We show that when G happens to be the fundamental group of an orientable Haken ma…