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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260424T133000
DTEND;TZID=Europe/Berlin:20260424T143000
DTSTAMP:20260419T105528
CREATED:20260320T134659Z
LAST-MODIFIED:20260320T134659Z
UID:12886-1777037400-1777041000@crc326gaus.de
SUMMARY:Duality for the condensed cohomology of the Weil group of a p-adic field
DESCRIPTION:Marco Artusa (CIRM (Luminy) and I2M (Marseille)) \nDuality theorems are among the central results in arithmetic geometry. For $p$-adic fields\, the earliest example is due to Tate\, dealing with Galois cohomology of finite Galois modules. To extend this result to more general coefficients\, one is forced to modify the original cohomology groups. This underlines some shortcomings of Galois cohomology\, such as the lack of a natural topology on cohomology groups. In this talk\, we build a new topological cohomology theory for p-adic fields\, thanks to the Weil group and Condensed Mathematics. Moreover\, we see how to use this cohomology theory to extend Tate’s result to more general topological coefficients. This new duality takes the form of a Pontryagin duality between locally compact abelian groups. As a particular case\, one gets the reciprocity isomorphisms of local class field theory “à la Weil”\, which identifies the units of a $p$-adic field and the abelianised Weil group. One could try to apply similar techniques to higher local fields. Inspired by Kato’s work\, the hope is to obtain a condensed-Weil version of higher local class field theory\, which would identify $d$-th Milnor $K$-theory of a higher local field with its abelianised Weil group.
URL:https://crc326gaus.de/event/duality-for-the-condensed-cohomology-of-the-weil-group-of-a-p-adic-field/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260424T140000
DTEND;TZID=Europe/Berlin:20260424T160000
DTSTAMP:20260419T105528
CREATED:20260414T084437Z
LAST-MODIFIED:20260415T110734Z
UID:13056-1777039200-1777046400@crc326gaus.de
SUMMARY:Variation of crepant resolutions of Kleinian singularities
DESCRIPTION:The McKay correspondence establishes a strong relationship between the classical minimal resolution and the standard orbifold resolution of a Kleinian surface singularity. Based on joint work with Ruth Wye\, I will explain how the McKay correspondence extends to a larger class of crepant stacky resolutions of the singularity\, and how their Hilbert schemes of points are related through variation of GIT quotients (VGIT). Time permitting\, I will also sketch some recent ideas from work in progress with Austin Hubbard on how to relate the resolutions themselves via VGIT by taking into account the variation of monoidal structures on their mutual derived category.
URL:https://crc326gaus.de/event/variation-of-crepant-resolutions-of-kleinian-singularities/
LOCATION:Heidelberg\, MATHEMATIKON\, SR 007\, Im Neuenheimer Feld 205\, Heidelberg\, 69120\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Bernhard Oberdieck":MAILTO:georgo@uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260424T153000
DTEND;TZID=Europe/Berlin:20260424T170000
DTSTAMP:20260419T105528
CREATED:20260323T091434Z
LAST-MODIFIED:20260323T091843Z
UID:12890-1777044600-1777050000@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Lucas Gerth (IMJ Paris): Moduli spaces of analytic p-divisible groups \nAbstract: We prove a classification of families of analytic p-divisible groups on adic spaces S over Qp in terms of Hodge–Tate triples on S\, generalizing a theorem of Fargues. From this\, for S a perfectoid space\, we construct an analytic Dieudonné theory with values in mixed characteristic Shtukas over the Fargues–Fontaine disc. As applications\, we realize the local Shimura varieties of EL and PEL type of Scholze–Weinstein as moduli spaces of analytic p-divisible groups with framed universal cover\, and we reinterpret the Hodge–Tate period map of Scholze in terms of topologically p-torsion subgroups of abelian varieties. \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-38/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260429T160000
DTEND;TZID=Europe/Berlin:20260429T180000
DTSTAMP:20260419T105528
CREATED:20260413T115012Z
LAST-MODIFIED:20260413T120837Z
UID:13049-1777478400-1777485600@crc326gaus.de
SUMMARY:Oberseminar Algebra und Geometrie
DESCRIPTION:Michael Temkin (MPI Bonn): Wild Hurwitz spaces and level structures \n\nAbstract: Hurwitz moduli spaces of covers of curves of degree d are classical and well studied objects if one assumes that d! is invertible and hence no wild ramification phenomena occur. There were very few attempts to study the wild case. In the most important one Abramovich and Oort started with the classical space H_{2\,1\,0\,4} of double covers of P^1 ramified at four points and (following an idea of Kontsevich and Pandariphande) described its schematic closure H in the space of stable maps over Z. The result over F_2 was both strange and informative\, but lacked a modular interpretation. \nIn the first part of my talk I will describe the example of Abramovich-Oort and then tell about a work in progress of Hippold\, where a (logarithmic) modular version of compactified Hurwitz space of degree p is constructed when only (p-1)! is invertible. In particular\, this conceptually explains phenomena observed by Abramovich-Oort. In the second part I will describe another outcome of the same ideas. It was observed by Abramovich-Oort that H is the blowing up of the modular curve X(2). This is not a coincidence\, and the same ideas can be used to refine the wild level structures of Drinfeld and construct modular interpretation of the minimal modifications of the curves X(p^n) which separate ordinary branches at any supersingular point. This is a very recent work in progress and the precise description of the obtained spaces is still to be found.
URL:https://crc326gaus.de/event/oberseminar-algebra-und-geometrie-6/
LOCATION:Frankfurt\, Robert-Mayer-Str. 6-8\, Raum 308
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260507T153000
DTEND;TZID=Europe/Berlin:20260507T183000
DTSTAMP:20260419T105528
CREATED:20260303T110945Z
LAST-MODIFIED:20260407T072932Z
UID:12755-1778167800-1778178600@crc326gaus.de
SUMMARY:CRC-Colloquium
DESCRIPTION:15:00 Coffee\n15:30 – 16:30 Sabrina Pauli (TU Darmstadt): Tropical and Arithmetic Perspectives\n16:30 Coffee and Cake\n17:00 – 18:00 Jakob Stix (Goethe Universität Frankfurt): The Anabelian Section Conjecture\n18:30 Dinner \n 
URL:https://crc326gaus.de/event/crc-colloquium/
LOCATION:Darmstadt
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260522T153000
DTEND;TZID=Europe/Berlin:20260522T170000
DTSTAMP:20260419T105528
CREATED:20260319T100054Z
LAST-MODIFIED:20260319T100054Z
UID:12873-1779463800-1779469200@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Lucien Hennecart (CNRS): tba \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-32/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260529T153000
DTEND;TZID=Europe/Berlin:20260529T170000
DTSTAMP:20260419T105528
CREATED:20260319T100223Z
LAST-MODIFIED:20260319T100223Z
UID:12875-1780068600-1780074000@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Manuel Hoff (Bielefeld): tba \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-33/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260612T153000
DTEND;TZID=Europe/Berlin:20260612T170000
DTSTAMP:20260419T105528
CREATED:20260319T100329Z
LAST-MODIFIED:20260319T100329Z
UID:12877-1781278200-1781283600@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Federico Binda (Milano): tba \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-34/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260619T153000
DTEND;TZID=Europe/Berlin:20260619T170000
DTSTAMP:20260419T105528
CREATED:20260319T100422Z
LAST-MODIFIED:20260319T100422Z
UID:12879-1781883000-1781888400@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Louisa Bröring (Duisburg-Essen): tba \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-35/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260703T153000
DTEND;TZID=Europe/Berlin:20260703T170000
DTSTAMP:20260419T105528
CREATED:20260319T100517Z
LAST-MODIFIED:20260319T100517Z
UID:12881-1783092600-1783098000@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Yujie Xu (Columbia): tba \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-36/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
END:VEVENT
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