Geometric invariant theory for graded unipotent group actions and applications

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• Kirwan, F (University of Oxford)
• Monday 20 July 2015, 14:00-15:00
• Seminar Room 2, Newton Institute Gatehouse.

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Metric and Analytic Aspects of Moduli Spaces

Mumford’s geometric invariant theory (GIT) provides a method for constructing (projective completions of) quotient varieties for linear actions of complex reductive groups on affine and projective varieties, and has many applications (for example in the construction of moduli spaces in algebraic geometry). Mumford’s GIT can be extended to actions of linear algebraic groups which are not necessarily reductive, but many of the nice properties belonging to reductive GIT no longer hold for non-reductive actions. The aim of this talk is to describe conditions under which these properties still hold for suitable non-reductive actions, and to discuss some applications

This talk is part of the Isaac Newton Institute Seminar Series series.

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