2002/01/26 by Francesco Costantino, Costantino, Francesco
Mathematics · #57N13 #FOS: Mathematics #Geometric Topology (math.GT) #math.GT #msc:57N13
paper · pdf · doi:10.48550/arxiv.math/0201259
The paper has been withdrawn
arxiv created 2002/05/14 · arxiv updated 2009/11/30
The paper has been withdrawn by the author due an error in the proof of Theorem 3.2.