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Seminars

Seminar
FIELD Mathematics
DATE December 07 (Mon), 2020
TIME 13:00-14:00
PLACE Online
SPEAKER Park, Byungdo
HOST Bhamidi, S.S Sreedhar
INSTITUTE Chungbuk National University
TITLE [GS_M_3W] Three W's Seminar: The Atiyah-J?nich theorem and its twisted refinement
ABSTRACT What is good mathematics? Should it be difficult by using technical arguments, should it be fancy by using advanced theories, or all these do not matter and should it have practical applications? In this talk for pedestrians, I am going to lead you to one of good mathematics and explain why it is good. The talk could be viewed as a brief introduction to category theory, as I shall explain what a category, a functor, and a natural transformation between two functors are in a way that leads to a statement of an elementary but a deep theorem proved by K. J?nich and M. Atiyah in the sixties that the space of homotopy classes of maps into the space of Fredholm operators on the Hilbert space is naturally isomorphic to the complex K-theory. I will then introduce a work in progress proving a twisted variant of this theorem. The talk is going to be accommodating non-experts and mostly self-contained.
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