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Groups And Dynamics
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Daniel Allcock, RLM 10.176: Automorphism groups of Enriques and Coble surfaces
Tuesday, September 18, 2018, 10:00am - 11:00am
(Joint work with Igor Dolgachev) There is a classical constructionof Enriques surfaces from cubic surfaces in P3. The automorphismgroups of these Enriques surfaces are more or less the same asthe isometry groups of certain infinite-sided polytopes in hyperbolicspace H9. We work out the automorphism group for a 1-parameterfamily of these Enriques surfaces, and a finite-index subgroupin general. Coble surfaces appear as degenerate cases, whenthe cubic surfaces acquire singularities.
Location: RLM 10.176

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