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Categorification of Chern characters

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Sarah Scherotzke
Universität Münster
Mon, 2017-11-27 09:00 - 10:00
MPIM Lecture Hall

The Chern character is a central construction with incarnations in algebraic topology, representation
theory and algebraic geometry. It is an important tool to probe $K$-theory, which is notoriously hard
to compute. In my talk, I will explain, what the categorification of the Chern character is and how we
can use it to show that certain classical constructions in algebraic geometry are of non-commutative
origin. The category of motives plays the role of $K$-theory in the categorified picture. The categorification
leads also to the construction of higher invariants such as the secondary Chern characters and secondary

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