Shadows in the Wild - Folded Galleries and Their Applications

Petra Schwer1
1IAG, Otto-von-Guericke University Magdeburg, Postschließfach 4120, 39016, Magdeburg, Germany

Tóm tắt

AbstractThis survey is about combinatorial objects related to reflection groups and their applications in representation theory and arithmetic geometry. Coxeter groups and folded galleries in Coxeter complexes are introduced in detail and illustrated by examples. Further it is explained how they relate to retractions in Bruhat-Tits buildings and to the geometry of affine flag varieties and affine Grassmannians. The goal is to make these topics accessible to a wide audience.

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