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SUMMARY:Wise's w-cycle conjecture and homological coherence for one-relato
 r groups - Lars Louder\, UCL
DTSTART:20150520T150000Z
DTEND:20150520T160000Z
UID:TALK59241@talks.cam.ac.uk
CONTACT:Jake Rasmussen
DESCRIPTION:A two-complex X has non-positive immersions if\, for every\nim
 mersion Y->X\, Y compact\, either \\chi(Y)<=0 or Y has trivial fundamental
 \ngroup. In this talk I'll show that presentation complexes for one-relato
 r\ngroups have non-positive immersions\, and\, as a corollary\, that finit
 ely\ngenerated subgroups of one-relator groups have finite second betti nu
 mbers.\nThis is joint work with Henry Wilton.
LOCATION:MR13
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