中文

Kazhdan groups with infinite outer automorphism group

群论 2007-05-23 v1

摘要

For each countable group QQ we produce a short exact sequence 1NGQ11\to N \to G \to Q\to 1 where GG is f.g. and has a graphical 16\frac16 presentation and NN is f.g. and satisfies property TT. As a consequence we produce a group NN with property TT such that \Out(N)\Out(N) is infinite. Using the tools developed we are also able to produce examples of nonHopfian and non-coHopfian groups with property TT. One of our main tools is the use of random groups to achieve certain properties.

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引用

@article{arxiv.math/0409203,
  title  = {Kazhdan groups with infinite outer automorphism group},
  author = {Yann Ollivier and Daniel T. Wise},
  journal= {arXiv preprint arXiv:math/0409203},
  year   = {2007}
}

备注

18 pages