If n G 3 and F is free of rank n, then Out Aut F s Out Out F s 1 . n n n แฎ 2000 Academic Press n is an isomorphism. Tits's theorem leads to a proof that the outer automor-
Automorphism groups of pictures
โ Scribed by Gerhard Behrendt
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 186 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0364-9024
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โฆ Synopsis
Abstract
A picture is a simple graph together with an edgeโcoloring, such that each vertex is incident with exactly one edge of each color. An automorphism of a picture is a graph automorphism that preserves the colors of the edges. We show that every group is isomorphic to the full automorphism group of a picture, and prove that a group is isomorphic to a vertexโtransitive subgroup of the automorphism group of a picture if and only if it can be generated by involutions.
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