Please note: In order to keep Hive up to date and provide users with the best features, we are no longer able to fully support Internet Explorer. The site is still available to you, however some sections of the site may appear broken. We would encourage you to move to a more modern browser like Firefox, Edge or Chrome in order to experience the site fully.

Automorphisms of Fusion Systems of Finite Simple Groups of Lie Type, Paperback / softback Book

Automorphisms of Fusion Systems of Finite Simple Groups of Lie Type Paperback / softback

Part of the Memoirs of the American Mathematical Society series

Paperback / softback

Description

For a finite group $G$ of Lie type and a prime $p$, the authors compare the automorphism groups of the fusion and linking systems of $G$ at $p$ with the automorphism group of $G$ itself.

When $p$ is the defining characteristic of $G$, they are all isomorphic, with a very short list of exceptions.

When $p$ is different from the defining characteristic, the situation is much more complex but can always be reduced to a case where the natural map from $\mathrm{Out}(G)$ to outer automorphisms of the fusion or linking system is split surjective.

This work is motivated in part by questions involving extending the local structure of a group by a group of automorphisms, and in part by wanting to describe self homotopy equivalences of $BG^\wedge _p$ in terms of $\mathrm{Out}(G)$.

Information

Other Formats

Information