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BEGIN:VEVENT
SUMMARY:Pavel Sechin (Duisburg-Essen University)
DTSTART:20200520T100000Z
DTEND:20200520T111500Z
DTSTAMP:20260414T083406Z
UID:MotivesAndWhatNot052020/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MotivesAndWh
 atNot052020/1/">Applications of Landweber-Novikov operations on algebraic 
 cobordism</a>\nby Pavel Sechin (Duisburg-Essen University) as part of Moti
 ves and What Not\n\n\nAbstract\nI will try to give an overview of how Land
 weber-Novikov operations can be used in the study of algebraic cobordism. 
 In particular\, these operations allow one to distinguish cobordism-motive
 s of some varieties with isomorphic Chow motives\, present obstructions to
  smoothing of cobordism classes and allow one to compute algebraic cobordi
 sm of curves and surfaces. If time permits\, applications of symmetric ope
 rations of Vishik will be mentioned.\n
LOCATION:https://researchseminars.org/talk/MotivesAndWhatNot052020/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Vladimir Sosnilo (Chebyshev Laboratory)
DTSTART:20200520T114500Z
DTEND:20200520T130000Z
DTSTAMP:20260414T083406Z
UID:MotivesAndWhatNot052020/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MotivesAndWh
 atNot052020/2/">Pro-excision for stacks</a>\nby Vladimir Sosnilo (Chebyshe
 v Laboratory) as part of Motives and What Not\n\n\nAbstract\nThe pro-excis
 ion statements for K-theory of rings and schemes play a crucial role in th
 e proof of Weibel's conjecture by Kerz\, Strunk\, and Tamme. In this talk\
 , we will prove analogous statements for algebraic stacks. This is joint w
 ork with Tom Bachmann\, Adeel Khan and Charanya Ravi.\n
LOCATION:https://researchseminars.org/talk/MotivesAndWhatNot052020/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Peter Haine (MIT)
DTSTART:20200520T150000Z
DTEND:20200520T161500Z
DTSTAMP:20260414T083406Z
UID:MotivesAndWhatNot052020/3
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MotivesAndWh
 atNot052020/3/">Stratified étale homotopy theory</a>\nby Peter Haine (MIT
 ) as part of Motives and What Not\n\n\nAbstract\nÉtale homotopy theory wa
 s invented by Artin and Mazur in the 1960s as a way to associate to a sche
 me X\, a homotopy type with fundamental group the étale fundamental group
  of X and whose cohomology captures the étale cohomology of X with locall
 y constant constructible coefficients. In this talk we’ll explain how to
  construct a stratified refinement of the étale homotopy type that classi
 fies constructible étale sheaves of spaces. We’ll also explain how to u
 se condensed mathematics to show that the stratified étale homotopy type 
 also classifies constructible ℓ-adic sheaves. This is joint work with Cl
 ark Barwick and Saul Glasman.\n
LOCATION:https://researchseminars.org/talk/MotivesAndWhatNot052020/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Elden Elmanto (Harvard)
DTSTART:20200520T164500Z
DTEND:20200520T180000Z
DTSTAMP:20260414T083406Z
UID:MotivesAndWhatNot052020/4
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MotivesAndWh
 atNot052020/4/">On the K-theory of universal homeomorphisms</a>\nby Elden 
 Elmanto (Harvard) as part of Motives and What Not\n\n\nAbstract\nI will mo
 tivate the study of universal homeomorphism (uh)-invariant theories from t
 he perspective of Grothendieck and the (mixed characteristic) minimal mode
 l program. Then I will explain a pullback square examining the behavior of
  rational K-theory under uh’s and\, time permitting\, ongoing work on th
 e Brauer stack. This is report on joint work with Mathew and Witaszek.\n
LOCATION:https://researchseminars.org/talk/MotivesAndWhatNot052020/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Christian Dahlhausen (UZH)
DTSTART:20200617T100000Z
DTEND:20200617T110000Z
DTSTAMP:20260414T083406Z
UID:MotivesAndWhatNot052020/5
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MotivesAndWh
 atNot052020/5/">Continuous K-theory and K-theory of Zariski-Riemann spaces
 </a>\nby Christian Dahlhausen (UZH) as part of Motives and What Not\n\n\nA
 bstract\nContinuous K-theory is a derivative of algebraic K-theory for rig
 id analytic spaces\, it was defined by Morrow and further studied by Kerz-
 Saito-Tamme. This talk will be an introduction to the subject. First we de
 fine continuous K-theory for Tate rings (e.g. affinoid algebras over some 
 complete discretely valued field) and then we use pro-cdh descent (by Kerz
 -Strunk-Tamme) to see that it satisfies descent for the admissible topolog
 y on the category of rigid spaces so that it is defined globally. In the s
 pirit of Raynaud's description of rigid spaces it is fruitful to study the
  continuous K-theory of a rigid space in terms of the continuous K-theory 
 of all its integral formal models\; this yields us to study the K-theory o
 f (relative) Zariski-Riemann spaces which behaves similar to the K-theory 
 of regular schemes (essentially due to Raynaud-Gruson's "platification par
  eclatement"). In the end\, I will state some results about negative conti
 nuous\nK-theory.   References:\n\n - Morrow: A historical overview of pro 
 cdh descent in algebraic K-theory and its relation to rigid analytic varie
 ties (arXiv:1612.00418).\n\n - Kerz-Saito-Tamme: K-theory of non-archimede
 an rings I. Doc. Math. 24\, 2019 (arXiv:1802.09819).\n\n - Dahlhausen: Con
 tinuous K-Theory and Cohomology of Rigid Spaces (arXiv:1910.10437).\n
LOCATION:https://researchseminars.org/talk/MotivesAndWhatNot052020/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Toni Annala (UBC)
DTSTART:20200617T113000Z
DTEND:20200617T123000Z
DTSTAMP:20260414T083406Z
UID:MotivesAndWhatNot052020/6
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MotivesAndWh
 atNot052020/6/">Derived algebraic cobordism — towards bivariant Conner
 –Floyd theorem</a>\nby Toni Annala (UBC) as part of Motives and What Not
 \n\n\nAbstract\nThe purpose of this talk is to introduce derived algebraic
  cobordism\, its basic properties\, and to list several open problems rela
 ted to it. We will then focus on one problem in particular: trying to prov
 e a bivariant version of the Conner–Floyd theorem\, which states that th
 e zeroth K-theory group of a (derived) scheme can be recovered easily from
  its algebraic cobordism. We will motivate why we have chosen to pursue th
 is problem\, and summarize the current results.\n
LOCATION:https://researchseminars.org/talk/MotivesAndWhatNot052020/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gabriela Guzman (IMPAN)
DTSTART:20200617T143000Z
DTEND:20200617T153000Z
DTSTAMP:20260414T083406Z
UID:MotivesAndWhatNot052020/7
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MotivesAndWh
 atNot052020/7/">Rational homotopy theory in A¹-algebraic topology</a>\nby
  Gabriela Guzman (IMPAN) as part of Motives and What Not\n\nAbstract: TBA\
 n
LOCATION:https://researchseminars.org/talk/MotivesAndWhatNot052020/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ben Antieau (UIC)
DTSTART:20200617T160000Z
DTEND:20200617T170000Z
DTSTAMP:20260414T083406Z
UID:MotivesAndWhatNot052020/8
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MotivesAndWh
 atNot052020/8/">Azumaya algebras in motivic homotopy theory</a>\nby Ben An
 tieau (UIC) as part of Motives and What Not\n\n\nAbstract\nI will explain 
 something about what is known and dreamt about Azumaya algebras in the con
 text of unstable motivic homotopy theory.\n
LOCATION:https://researchseminars.org/talk/MotivesAndWhatNot052020/8/
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