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- W1510971641 abstract "We develop the foundations of the deformation theory of compact complete affine space forms and affine crystallographic groups. Using methods from the theory of linear algebraic groups we show that these deformation spaces inherit an algebraic structure from the space of crystallographic homomorphisms. We also study the properties of the action of the homotopy mapping class groups on deformation spaces. In our context these groups are arithmetic groups, and we construct examples of flat affine manifolds where every finite group of mapping classes admits a fixed point on the deformation space. We also show that the existence of fixed points on the deformation space is equivalent to the realisation of finite groups of homotopy equivalences by finite groups of affine diffeomorphisms. Extending ideas of Auslander we relate the deformation spaces of affine space forms with solvable fundamental group to deformation spaces of manifolds with nilpotent fundamental group. We give applications concerning the classification problem for affine space forms." @default.
- W1510971641 created "2016-06-24" @default.
- W1510971641 creator A5054708161 @default.
- W1510971641 date "2008-09-04" @default.
- W1510971641 modified "2023-09-27" @default.
- W1510971641 title "Deformation Spaces for Affine Crystallographic Groups" @default.
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