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The Module structure of a Group Action on a Ring

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  • UserPeter Symonds (University of Manchester)
  • ClockFriday 21 June 2024, 16:45-17:15
  • HouseExternal.

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TRHW02 - International Conference

Consider a finite group $G$ acting on a graded Noetherian $k$-algebra $S$, for some field $k$ of characteristic $p$; for example $S$ might be a polynomial ring. Regard $S$ as a $kG$-module and consider the multiplicity of a particular indecomposable module as a summand in each degree. We show how this can be described in terms of homological algebra and how it is linked to the geometry of the group action on the spectrum of $S$.

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

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