2023 - T2 - WS1 - GAP XVIII: Homotopy algebras and higher structures

Collection 2023 - T2 - WS1 - GAP XVIII: Homotopy algebras and higher structures

Organisateur(s) Cattaneo, Alberto ; Jotz, Madeleine ; Liao, Hsuan-Yi ; Schiavina, Michele ; Stiénon, Mathieu ; Xu, Ping
Date(s) 22/05/2023 - 26/05/2023
URL associée https://indico.math.cnrs.fr/event/7882/
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Categorification of Euler’s continuants, N-spherical functors and periodic semiorthogonal decompositions

De Mikhail Kapranov

Euler continuants are universal polynomials expressing the numerator and denominator of a finite continued fraction whose entries are independent variable. Remarkably, they allow categorical lifts which are certain complexes constructed out of a functor and its iterated adjoints. The totalizations of these complexes can be seen as higher analogs of spherical twists and cotwists and lead to a generalization of spherical functors which we call N-spherical. They describe periodic semi-orthogonal decompositions (SODs) of triangulated (or, rather stable infinity-) categories. In fact, forming iterated mutations of an SOD can be seen as a categorical lift of forming a continued fraction. Joint work with T. Dyckerhoff, V. Schechtman.

Informations sur la vidéo

  • Date de publication 26/05/2023
  • Institut IHP
  • Langue Anglais
  • Format MP4

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