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SUMMARY:Spherical delta-rings
DTSTART:20260609T120000Z
DTEND:20260609T130000Z
DTSTAMP:20260610T191300Z
UID:indico-event-15881@indico.math.cnrs.fr
DESCRIPTION:Speakers: Edith Hübner (Universität Münster)\n\nJoyal’s n
 otion of a delta-ring has lately gained much prominence in the context of 
 prismatic cohomology. Extensions of the notion to derived algebra have bee
 n considered among others by Bhatt\, Lurie and Scholze\, however\, there i
 s currently no analog of the theory of delta-rings in spectral algebra. In
  this talk\, I’ll speak about a possible definition of delta-rings over 
 the sphere - given by E-infinity rings equipped with a suitably defined li
 ft of the Tate-valued Frobenius.I will discuss some (non-)examples\, show 
 that pi_0 of a spherical delta-ring is an ordinary delta-ring and point ou
 t some subtleties which distinguish the theory of spherical delta-rings fr
 om animated and derived delta-rings. This is joint work in progress with T
 homas Nikolaus.\n\nhttps://indico.math.cnrs.fr/event/15881/
LOCATION:IMT 1R2 207 (Salle Pellos)
URL:https://indico.math.cnrs.fr/event/15881/
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