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X-WR-CALDESC:Events for CRC 326 - GAUS
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TZID:Europe/Berlin
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END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240524T090000
DTEND;TZID=Europe/Berlin:20240524T110000
DTSTAMP:20260423T160828
CREATED:20240507T091338Z
LAST-MODIFIED:20240521T142131Z
UID:8496-1716541200-1716548400@crc326gaus.de
SUMMARY:Shtukas for reductive groups and global Langlands correspondence after Vincent Lafforgue
DESCRIPTION:Talk 5: Paul Siemon (TU Darmstadt): Geometric Satake \n 
URL:https://crc326gaus.de/event/shtukas-for-reductive-groups-and-global-langlands-correspondence-after-vincent-lafforgue-4/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240524T153000
DTEND;TZID=Europe/Berlin:20240524T170000
DTSTAMP:20260423T160828
CREATED:20240508T110014Z
LAST-MODIFIED:20240508T110014Z
UID:8530-1716564600-1716570000@crc326gaus.de
SUMMARY:Seminar on arithemtic geometry
DESCRIPTION:Torsten Wedhorn (TU Darmstadt): Moduli of truncated shtukas \nZoom 635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithemtic-geometry/
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:20240528T140000
DTEND;TZID=Europe/Berlin:20240528T153000
DTSTAMP:20260423T160828
CREATED:20240405T100826Z
LAST-MODIFIED:20240419T115929Z
UID:8095-1716904800-1716910200@crc326gaus.de
SUMMARY:Chromatic Homotopy Theory
DESCRIPTION:Paul Siemon (TU Darmstadt) \nTalk 7 – Flat modules over MFG \nZoom meeting ID: 612 2072 7363\, Password: Largest six digit prime number
URL:https://crc326gaus.de/event/chromatic-homotopy-theory-7/
LOCATION:Darmstadt\, Room 401\, Mainz Room 04-432 and Zoom\, Darmstadt and Mainz\, Darmstadt and Mainz
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240528T160000
DTEND;TZID=Europe/Berlin:20240528T170000
DTSTAMP:20260423T160828
CREATED:20240515T075300Z
LAST-MODIFIED:20240516T130920Z
UID:8608-1716912000-1716915600@crc326gaus.de
SUMMARY:The rhizomic topology and tropical abelian varieties
DESCRIPTION:Leo Herr (Universität Leiden) \nAbstract:\nThe log etale topology is a natural analogue of the etale topology for log schemes. Unfortunately\, very few things satisfy log etale descent — not even vector bundles or the structure sheaf. We introduce a new rhizomic topology that sits in between the usual and log etale topologies and show most things do satisfy rhizomic descent! As a case study\, we look at tropical abelian varieties and give some exotic examples.
URL:https://crc326gaus.de/event/leo-herr-universitat-leiden/
LOCATION:Frankfurt\, RM-Str. 6-8\, R. 308
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240531T090000
DTEND;TZID=Europe/Berlin:20240531T110000
DTSTAMP:20260423T160828
CREATED:20240507T092644Z
LAST-MODIFIED:20240521T141839Z
UID:8498-1717146000-1717153200@crc326gaus.de
SUMMARY:Shtukas for reductive groups and global Langlands correspondence after Vincent Lafforgue
DESCRIPTION:Talk 6: Oğuz Gezmiş (Universität Heidelberg): Cohomology of moduli of shtukas \n 
URL:https://crc326gaus.de/event/shtukas-for-reductive-groups-and-global-langlands-correspondence-after-vincent-lafforgue-5/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240531T133000
DTEND;TZID=Europe/Berlin:20240531T150000
DTSTAMP:20260423T160828
CREATED:20240524T134332Z
LAST-MODIFIED:20240524T134459Z
UID:8711-1717162200-1717167600@crc326gaus.de
SUMMARY:Isotropic motivic categories
DESCRIPTION:Fabio Tanania (TU Darmstadt) \nIn this talk\, I will introduce the isotropic stable motivic homotopy category\, which is a stable homotopic version of Vishik’s category of isotropic motives. These are local versions of the classical motivic categories SH(k) and DM(k)\, obtained roughly speaking by annihilating motives of anisotropic varieties. When the base field k is flexible\, then isotropic motivic categories have a lot of remarkable properties. As an example\, I will describe the structure of cellular isotropic spectra in terms of well-known objects coming from classical homotopy theory. Then\, I will discuss what is known about the non-cellular part of isotropic motivic categories and state some open questions.
URL:https://crc326gaus.de/event/isotropic-motivic-categories/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240531T153000
DTEND;TZID=Europe/Berlin:20240531T170000
DTSTAMP:20260423T160828
CREATED:20240405T092453Z
LAST-MODIFIED:20240514T125212Z
UID:8079-1717169400-1717174800@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Rizacan Ciloglu (TU Darmstadt): Perverse sheaves on twisted affine flag varieties \nZoom 635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-4/
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:20240604T140000
DTEND;TZID=Europe/Berlin:20240604T153000
DTSTAMP:20260423T160828
CREATED:20240405T100952Z
LAST-MODIFIED:20240419T120007Z
UID:8097-1717509600-1717515000@crc326gaus.de
SUMMARY:Chromatic Homotopy Theory
DESCRIPTION:Torsten Wedhorn (TU Darmstadt) \nTalk 8 – Even periodic cohomology theories \nZoom meeting ID: 612 2072 7363\, Password: Largest six digit prime number
URL:https://crc326gaus.de/event/chromatic-homotopy-theory-8/
LOCATION:Darmstadt\, Room 401\, Mainz Room 04-432 and Zoom\, Darmstadt and Mainz\, Darmstadt and Mainz
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240606T091500
DTEND;TZID=Europe/Berlin:20240606T104500
DTSTAMP:20260423T160828
CREATED:20240429T091923Z
LAST-MODIFIED:20240529T095055Z
UID:8342-1717665300-1717670700@crc326gaus.de
SUMMARY:Purity for the flat cohomology
DESCRIPTION:Talk 4: Marius Leonhardt (Universität Heidelberg): Inputs from crystalline and prismatic Dieudonné theory
URL:https://crc326gaus.de/event/purity-for-the-flat-cohomology-4/
LOCATION:Heidelberg\, Mathematikon\, SR tba
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240606T110000
DTEND;TZID=Europe/Berlin:20240606T130000
DTSTAMP:20260423T160828
CREATED:20240430T090535Z
LAST-MODIFIED:20240430T090535Z
UID:8377-1717671600-1717678800@crc326gaus.de
SUMMARY:Arithmetic of critical p-adic L-functions
DESCRIPTION:Talk 6: Max Witzelsperger: Secondary p-adic L-functions
URL:https://crc326gaus.de/event/arithmetic-of-critical-p-adic-l-functions-4/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240606T153000
DTEND;TZID=Europe/Berlin:20240606T183000
DTSTAMP:20260423T160828
CREATED:20240206T181647Z
LAST-MODIFIED:20240514T064410Z
UID:7729-1717687800-1717698600@crc326gaus.de
SUMMARY:CRC-Colloquium
DESCRIPTION:15:20 Coffee (or earlier)\n15:30 – 16:30 Georg Tamme (Universität Mainz): Higher algebra and K-theory\n16:30 Coffee and Cake\n17:15 – 18:15 Otmar Venjakob (Universität Heidelberg): Explicit Reciprocity Laws in Number Theory\n18:45 Dinner \nAbstract G. Tamme:\nAlgebraic K-theory\, more precisely the group K_0(X) of a scheme X\, was first introduced by Grothendieck in order to formulate and prove a very general Riemann-Roch theorem. Subsequently\, lower (i.e. K_i for i<0) and higher (i.e. K_i for i>0) K-groups have been introduced by Bass\, Milnor\, Quillen\, and Thomason. They have turned out to be a rich invariant\, playing an important role in various fields such as number theory and topology. Although explicit computations of K-groups remain challenging\, modern methods from higher algebra and derived algebraic geometry have led to several breakthrough structural results concerning these groups. In the talk\, I will give an introduction to these topics and\, time permitting\, discuss some recent applications. \nAbstract O. Venjakob:\nThe quadratic Reciprocity Law for the Legendre or Jacobi-Symbol forms the starting point of all Reciprocity Laws as well as of class field theory. It is closely related to the product formula of the quadratic Hilbert-Symbol over local fields. Various mathematicians have established higher explicit formulae to compute higher Hilbert-Symbols. Analogs were found for formal (Lubin-Tate) groups. Eventually Perrin-Riou has formulated a Reciprocity Law\, which allows the explicit computation of local cup product pairings by means of Iwasawa- and p-adic Hodge Theory. In this talk I shall try to give an overview of these topics\, at the end I will explain recent developments in this regard.
URL:https://crc326gaus.de/event/crc-colloquium-2/
LOCATION:Darmstadt Gebäude S1|15\, Hörsaal 133
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240607T090000
DTEND;TZID=Europe/Berlin:20240607T110000
DTSTAMP:20260423T160828
CREATED:20240507T092922Z
LAST-MODIFIED:20240531T141311Z
UID:8500-1717750800-1717758000@crc326gaus.de
SUMMARY:Shtukas for reductive groups and global Langlands correspondence after Vincent Lafforgue
DESCRIPTION:Talk 7: Alireza Shavali  (Universität Heidelberg): Finiteness of cohomology of moduli of shtukas \n 
URL:https://crc326gaus.de/event/shtukas-for-reductive-groups-and-global-langlands-correspondence-after-vincent-lafforgue-6/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240607T133000
DTEND;TZID=Europe/Berlin:20240607T150000
DTSTAMP:20260423T160828
CREATED:20240531T140523Z
LAST-MODIFIED:20240531T140523Z
UID:8729-1717767000-1717772400@crc326gaus.de
SUMMARY:Zagier’s conjecture on polylogarithms: from function fields to number fields
DESCRIPTION:Quentin Gazda (CMLS Palaiseau) \nZagier’s conjecture is a certain formulation of the following slogan: linear relations among polylogarithms evaluated at algebraic numbers arise from relations between K-theory symbols. By identifying the different attributes of this conjecture\, one can state and prove a similar version in arithmetic of function fields. Classical polylogarithms are then replaced by those of Carlitz. The proof\, very different from the techniques developed so far\, uses ingredients from the theory of difference equations. It involves deformations of Carlitz polylogarithms where a new variable $t$ appears. This results from a joint work with A. Maurischat.\nWhile we currently lack the technology to reproduce this argument in number theory\, it is amusing to speculate on a hypothetical transcription. $q$-deformations of polylogarithms then replace these « $t$-deformations ». With T. Bouis\, we recently encountered versions of $q$-polylogarithms in the syntomic Chern class introduced by Bhatt-Lurie. This is encouraging…! I will mention these works in a second part of the presentation.
URL:https://crc326gaus.de/event/zagiers-conjecture-on-polylogarithms-from-function-fields-to-number-fields/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="O%C4%9Fuz Gezmi%C5%9F":MAILTO:oguz.gezmis@iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240607T153000
DTEND;TZID=Europe/Berlin:20240607T170000
DTSTAMP:20260423T160828
CREATED:20240521T124427Z
LAST-MODIFIED:20240521T124427Z
UID:8683-1717774200-1717779600@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Minjia Zhang (Princeton University): Igusa stacks and cohomology of Shimura varieties \nShimura varieties have been playing an important role in the Langlands program. Recently\, following a conjecture of Peter Scholze\, we have constructed certain p-adic geometric objects\, which we call ​”Igusa stacks” (in the PEL type case)\, which encode prime-to-p information of Shimura varieties. Together with certain flag varieties (encoding information of Shimura varieties at p)\, they give p-adic uniformization of Shimura varieties. In this talk\, I will explain construction of Igusa stack for Hodge type Shimura varieties\, which leads to new proofs of Mantovan’s product formula\, Eichler-Shimura relations\, and vanishing type results about torsion cohomology of Shimura varieties. This is based on joint work with Patrick Daniels\, Daniel Kim and Pol van Hoften. \nZoom 635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-10/
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;VALUE=DATE:20240610
DTEND;VALUE=DATE:20240615
DTSTAMP:20260423T160828
CREATED:20240305T105455Z
LAST-MODIFIED:20240305T140327Z
UID:7824-1717977600-1718409599@crc326gaus.de
SUMMARY:Conference: Vertex algebras\, geometric representation theory and quantum groups
DESCRIPTION:For more information see \nhttps://conferences.cirm-math.fr/3045.html
URL:https://crc326gaus.de/event/conference-vertex-algebras-geometric-representation-theory-and-quantum-groups/
LOCATION:Marseille
CATEGORIES:GAUS-Workshop
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240611T140000
DTEND;TZID=Europe/Berlin:20240611T153000
DTSTAMP:20260423T160828
CREATED:20240405T101128Z
LAST-MODIFIED:20240419T120059Z
UID:8099-1718114400-1718119800@crc326gaus.de
SUMMARY:Chromatic Homotopy Theory
DESCRIPTION:Lucas Gerth (Uni Frankfurt) \nTalk 9* – Lubin–Tate theory \nZoom meeting ID: 612 2072 7363\, Password: Largest six digit prime number
URL:https://crc326gaus.de/event/chromatic-homotopy-theory-9/
LOCATION:Darmstadt\, Room 401\, Mainz Room 04-432 and Zoom\, Darmstadt and Mainz\, Darmstadt and Mainz
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240611T160000
DTEND;TZID=Europe/Berlin:20240611T170000
DTSTAMP:20260423T160828
CREATED:20240429T085211Z
LAST-MODIFIED:20240521T123958Z
UID:8323-1718121600-1718125200@crc326gaus.de
SUMMARY:On the denominators of the special values of the partial zeta functions of real quadratic fields
DESCRIPTION:International Seminar on Automorphic Forms \nHohto Bekki (MPIM Bonn) \nIt is classically known that the special values of the partial zeta functions of real quadratic fields\, or more generally\, of totally real fields at negative integers are rational numbers. In this talk\, I would like to discuss the denominators of these rational numbers in the case of real quadratic fields. More precisely\, Duke recently presented a conjecture which gives a universal upper bound for the denominators of these special values of the partial zeta functions of real quadratic fields. I would like to explain that by using Harder’s theory on the denominator of the Eisenstein class for SL(2\,Z)\, we can prove the conjecture of Duke and moreover the sharpness of his upper bound. This is a joint work with Ryotaro Sakamoto. \nhttps://tu-darmstadt.zoom.us/j/68048280736
URL:https://crc326gaus.de/event/tba-104/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240612T160000
DTEND;TZID=Europe/Berlin:20240612T180000
DTSTAMP:20260423T160828
CREATED:20240418T105516Z
LAST-MODIFIED:20240605T081138Z
UID:8211-1718208000-1718215200@crc326gaus.de
SUMMARY:A gentle introduction to non-abelian Hodge and P=W conjecture
DESCRIPTION:Oberseminar Algebra und Geometrie \nAlexandre Minets (MPI Bonn) \nAbstract: \nTitle: A gentle introduction to non-abelian Hodge and P=W conjecture\nAbstract: Let C be a Riemann surface\, and M_B the character variety of C; in other words\, the points of M_B parameterise representations of the fundamental group of C. Up to a _non-algebraic_ homeomorphism\, M_B can also be realized as the variety M_H of algebraic vector bundles on C equipped with a twisted endomorphism (otherwise known as Higgs bundles). The P=W conjecture of de Cataldo-Hausel-Migliorini postulates that some algebraic data survives the homeomorphisms above; more precisely\, the number of F_q-points of M_B is controlled by an algebraic integrable system on M_H. I will give a gentle introduction to these objects\, focusing on one explicit example. If time permits\, I will sketch some ideas that went into our recent proof of P=W (joint with T. Hausel\, A. Mellit\, O. Schiffmann).
URL:https://crc326gaus.de/event/tba-100/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240613T091500
DTEND;TZID=Europe/Berlin:20240613T104500
DTSTAMP:20260423T160828
CREATED:20240429T092044Z
LAST-MODIFIED:20240702T074343Z
UID:8344-1718270100-1718275500@crc326gaus.de
SUMMARY:Purity for the flat cohomology
DESCRIPTION:Talk 5: Tim Holzschuh (Universität Heidelberg): Introduction to animated rings and cohomology of affine smooth groups (Part 1)
URL:https://crc326gaus.de/event/purity-for-the-flat-cohomology-5/
LOCATION:Heidelberg\, Mathematikon\, SR tba
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240613T110000
DTEND;TZID=Europe/Berlin:20240613T130000
DTSTAMP:20260423T160828
CREATED:20240430T090728Z
LAST-MODIFIED:20240430T090728Z
UID:8379-1718276400-1718283600@crc326gaus.de
SUMMARY:Arithmetic of critical p-adic L-functions
DESCRIPTION:Talk 7: Rustam Steingart: Big Galois representations
URL:https://crc326gaus.de/event/arithmetic-of-critical-p-adic-l-functions-5/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240613T140000
DTEND;TZID=Europe/Berlin:20240613T170000
DTSTAMP:20260423T160828
CREATED:20240326T150008Z
LAST-MODIFIED:20240418T110816Z
UID:7992-1718287200-1718298000@crc326gaus.de
SUMMARY:Anabelian geometry
DESCRIPTION:14:00 – 15:15 Talk 4: Leonie Scherer (Goethe Universität): Belyi’s theorem and tangential base-points \nCoffee break \n15:45 – 17:00 Talk 5: Marcin Lara (Goethe Universität): Consequences of Belyi’s theorem\, direct sums and tensor products
URL:https://crc326gaus.de/event/anabelian-geometry-8/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240614T090000
DTEND;TZID=Europe/Berlin:20240614T110000
DTSTAMP:20260423T160828
CREATED:20240507T102442Z
LAST-MODIFIED:20240607T132748Z
UID:8502-1718355600-1718362800@crc326gaus.de
SUMMARY:Shtukas for reductive groups and global Langlands correspondence after Vincent Lafforgue
DESCRIPTION:Talk 8: Sriram C. Venkata: Specialization to the diagonal (Part I) \n 
URL:https://crc326gaus.de/event/shtukas-for-reductive-groups-and-global-langlands-correspondence-after-vincent-lafforgue-7/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240614T143000
DTEND;TZID=Europe/Berlin:20240614T153000
DTSTAMP:20260423T160828
CREATED:20240523T104259Z
LAST-MODIFIED:20240606T091248Z
UID:8706-1718375400-1718379000@crc326gaus.de
SUMMARY:The log tautological ring of the moduli space of curves
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (Second meeting Summer Semester 2024) \nPim Spelier (Universität Leiden) \nAbstract: \nThe tautological ring of Mgn-bar has been a crucial object in the study of the intersection theory of the moduli space of curves. Recently\, there has been more focus on the logarithmic enumerative geometry of Mgn-bar\, with interesting classes coming from e.g. log double ramification cycles. We present a definition of the log tautological ring of Mgn-bar\, together with a log decorated strata algebra\, and prove several structure results. The main new tools are the notions of cone stacks with boundary and homological piecewise polynomials\, that capture the tropicalisation of strata of log smooth stacks and the combinatorial part of their intersection theory.\nThis is joint work with Rahul Pandharipande\, Dhruv Ranganathan and Johannes Schmitt.
URL:https://crc326gaus.de/event/tba-108/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240614T153000
DTEND;TZID=Europe/Berlin:20240614T170000
DTSTAMP:20260423T160828
CREATED:20240405T092620Z
LAST-MODIFIED:20240527T124336Z
UID:8081-1718379000-1718384400@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Timo Richarz (TU Darmstadt): Cohomological motives \nZoom 635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-5/
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:20240614T160000
DTEND;TZID=Europe/Berlin:20240614T170000
DTSTAMP:20260423T160828
CREATED:20240523T104843Z
LAST-MODIFIED:20240529T075236Z
UID:8708-1718380800-1718384400@crc326gaus.de
SUMMARY:Counting Weierstrass points on degenerating algebraic curves
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (Second meeting Summer Semester 2024) \nLucas Gierczak (Institut Polytechnique de Paris) \nAbstract:\nWeierstrass points on algebraic curves are special points of high importance in algebraic geometry and arithmetic geometry. In this talk\, we study how those special points behave when the algebraic curve degenerates to a nodal curve. To this end\, we first explain why tropical geometry is a relevant formalism for studying degeneration questions. We then define a tropical analogue on metric graphs (seen as tropical curves) for Weierstrass points\, and explore the properties of the so-called “tropical Weierstrass locus”. We also associate intrinsic weights to the connected components of this locus\, and show that their total sum for a given metric graph and divisor is a function of few combinatorial parameters (degree and rank of the divisor\, genus of the metric graph). Finally\, in the case the divisor on the metric graph comes from the tropicalization of a divisor on an algebraic curve\, we specify the compatibility between the Weierstrass loci.
URL:https://crc326gaus.de/event/tba-109/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240617
DTEND;VALUE=DATE:20240618
DTSTAMP:20260423T160828
CREATED:20240506T125324Z
LAST-MODIFIED:20240506T125324Z
UID:8472-1718582400-1718668799@crc326gaus.de
SUMMARY:Junior AG
DESCRIPTION:CM Cycles on GSpin Shimura Varieties \nFor further details see Programme.
URL:https://crc326gaus.de/event/junior-ag-2/
LOCATION:Darmstadt
CATEGORIES:GAUS-Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240618T140000
DTEND;TZID=Europe/Berlin:20240618T153000
DTSTAMP:20260423T160828
CREATED:20240405T101253Z
LAST-MODIFIED:20240419T120140Z
UID:8101-1718719200-1718724600@crc326gaus.de
SUMMARY:Chromatic Homotopy Theory
DESCRIPTION:Chirantan Chowdhury (TU Darmstadt) \nTalk 10 – Morava E-theory & Morava K-theory \nZoom meeting ID: 612 2072 7363\, Password: Largest six digit prime number
URL:https://crc326gaus.de/event/chromatic-homotopy-theory-10/
LOCATION:Darmstadt\, Room 401\, Mainz Room 04-432 and Zoom\, Darmstadt and Mainz\, Darmstadt and Mainz
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240618T160000
DTEND;TZID=Europe/Berlin:20240618T170000
DTSTAMP:20260423T160828
CREATED:20240429T085331Z
LAST-MODIFIED:20240613T073207Z
UID:8325-1718726400-1718730000@crc326gaus.de
SUMMARY:The fiber bundle method applied to triple product L-functions
DESCRIPTION:International Seminar on Automorphic Forms \nMiao Gu (University of Michigan): The fiber bundle method applied to triple product L-functions \nThe Poisson summation conjecture of Braverman-Kazhdan\, L. Lafforgue\, Ngô\, and Sakellaridis predicts that spherical varieties (or Whittaker induction thereof) over a global field admit a theory of Fourier analysis\, including a generalized Poisson summation formula. The fiber bundle method is a technique for proving the Poisson summation conjecture for spherical varieties that can be written as a family of simpler spherical varieties for which the Poisson summation conjecture is known. In this talk\, I will first explain how to relate a generalized Whittaker induction to triple product L-functions. Then I will explain the fiber bundle method and describe an approach to applying it to prove the expected analytic properties of the triple product L-functions. This is joint work with Jayce Getz\, Chun-Hsien Hsu\, and Spencer Leslie. \nhttps://tu-darmstadt.zoom.us/j/68048280736
URL:https://crc326gaus.de/event/tba-105/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240618T170000
DTEND;TZID=Europe/Berlin:20240618T180000
DTSTAMP:20260423T160828
CREATED:20240610T091519Z
LAST-MODIFIED:20240610T091519Z
UID:8762-1718730000-1718733600@crc326gaus.de
SUMMARY:On recent progress on the chiral de Rham complex and modular forms
DESCRIPTION:Xuanzhong Dai (RIMS): On recent progress on the chiral de Rham complex and modular forms \nThe Chiral de Rham complex introduced by Malikov et al. is a sheaf construction of vertex algebras on any smooth manifold or nonsingular algebraic variety. Applying this technique to the upper half plane\, we obtain a quantization of modular forms\, which recovers the Rankin-Cohen brackets\, a family of bilinear operations on modular forms. It has long been speculated that the Rankin-Cohen brackets are connected to vertex operator algebras\, as initially proposed by W. Eholzer\, Y. Manin\, and D. Zagier. Our construction naturally inherits a vertex algebra structure\, with the vertex operation fully determined by a slight modification of the Rankin-Cohen brackets.
URL:https://crc326gaus.de/event/on-recent-progress-on-the-chiral-de-rham-complex-and-modular-forms/
LOCATION:Darmstadt\, Room S215 401
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240619T160000
DTEND;TZID=Europe/Berlin:20240619T170000
DTSTAMP:20260423T160828
CREATED:20240313T064035Z
LAST-MODIFIED:20240610T094156Z
UID:7894-1718812800-1718816400@crc326gaus.de
SUMMARY:Heptagons\, quartics and theta characteristics
DESCRIPTION:Oberseminar Algebra und Geometrie \nDaniele Agostini  (Universität Tübingen) \nAbstract: A construction of Wachspress associates to a heptagon a plane  quartic curve. This has been recently reinterpreted from the point of view of positive geometry\, and numerical computations suggest that a general plane quartic arises from precisely 864 heptagons. We prove this rigorously\, via theta characteristics and the finite group PSL(2\,7). This is joint work with Daniel Plaumann\, Rainer Sinn and Jannik Weisner.
URL:https://crc326gaus.de/event/tba-96/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
END:VCALENDAR