On automorphisms of free groups and nearly canonical trees

Abstract:

I will discuss some open problems for automorphisms of free groups; whether centralisers are finitely generated, whether their mapping tori have well-behaved automorphism group, and whether the conjugacy problem is solvable. I will explain some new partial results, using techniques involving canonical trees.

This is joint work Naomi Andrew, and various others.

algebraic topologydifferential geometrydynamical systemsgroup theorygeometric topologysymplectic geometry

Audience: researchers in the topic

( paper | slides )

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Geometry and topology online

Series comments: You can also find up-to-date information on the seminar homepage - warwick.ac.uk/fac/sci/maths/research/events/seminars/areas/geomtop/

The talks start five minutes after the hour. Talks are typically 55 minutes long, including time for questions.

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