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- W2398839475 abstract "It is well known that surface groups admit free and proper actions on finite products of infinite valence trees. In this note, we address the question of whether there can be a free and proper action on a finite product of bounded valence trees. We provide some obstructions and an arithmetic criterion for existence. The bulk of the paper is devoted to an approach to verifying the arithmetic criterion by studying the character variety of certain surface groups over fields of positive characteristic. The methods may be useful for attempting to determine when groups admit good linear representations in other contexts." @default.
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- W2398839475 date "2016-05-17" @default.
- W2398839475 modified "2023-09-27" @default.
- W2398839475 title "Character varieties and actions on products of trees" @default.
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