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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241129T133000
DTEND;TZID=Europe/Berlin:20241129T143000
DTSTAMP:20260409T125423
CREATED:20241119T102406Z
LAST-MODIFIED:20241125T105040Z
UID:9903-1732887000-1732890600@crc326gaus.de
SUMMARY:The degree of algebraic cycles on hypersurfaces
DESCRIPTION:Matthias Paulsen (Universität Marburg) \nAbstract: Let X be a very general hypersurface of dimension 3 and degree d at least 6. Griffiths and Harris conjectured in 1985 that the degree of every curve on X is divisible by d. Substantial progress on this conjecture was made by Kollár in 1991 via degeneration arguments. However\, the conjecture of Griffiths and Harris remained open in any degree d. In this talk\, I will explain how to prove this conjecture (and its higher-dimensional analogues) for infinitely many degrees d.
URL:https://crc326gaus.de/event/the-degree-of-algebraic-cycles-on-hypersurfaces/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241129T153000
DTEND;TZID=Europe/Berlin:20241129T170000
DTSTAMP:20260409T125423
CREATED:20241016T112643Z
LAST-MODIFIED:20241119T072742Z
UID:9356-1732894200-1732899600@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Felipe Espreafico (IMJ-PRG): Gauss-Main Connection in Disguise: A «quasi-modularity» for Gromov-Witten invariants for the Quintic Threefold \nGromov-Witten invariants and modularity are topics that often come together. In this talk\, we will explore a type of quasi-modularity for the genus zero invariants for the quintic threefold. We start by explaining how classical Eisenstein series are related to periods of the Weistrass family of Elliptic Curves. A similar relation may be observed by looking at periods of the mirror quintic family: that generating functions for the genus zero invariants can be written in terms of solutions to certain differential systems coming from the Gauss-Manin connection that generalize the classical Ramanujan equations that give rise to Eisenstein series. This is part of larger program called Gauss-Manin connection in Disguise\, that can be also applied in other contexts. We finish by briefly discussing other applications and further questions. \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-15/
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:20241203T140000
DTEND;TZID=Europe/Berlin:20241203T153000
DTSTAMP:20260409T125423
CREATED:20241108T103025Z
LAST-MODIFIED:20241108T103025Z
UID:9767-1733234400-1733239800@crc326gaus.de
SUMMARY:Vector bundles on curves
DESCRIPTION:Rizacan Ciloglu : Existence of semi-stable vector bundles and examples \nZoom (612 2072 7363\, Password: largest six digit prime number)
URL:https://crc326gaus.de/event/vector-bundles-on-curves-6/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241203T160000
DTEND;TZID=Europe/Berlin:20241203T170000
DTSTAMP:20260409T125423
CREATED:20241016T114757Z
LAST-MODIFIED:20241127T145427Z
UID:9394-1733241600-1733245200@crc326gaus.de
SUMMARY:Topographs and some infinite series
DESCRIPTION:International Seminar on Automorphic Forms \nCormac O’Sullivan (CUNY)): Topographs and some infinite series\nThe Fibonacci numbers are a familiar recursive sequence. Topographs are a kind of two dimensional version conjured up by J.H. Conway in his study of integral binary quadratic forms. These forms are ax^2 + bxy + cy^2 with integer coefficients\, and have a long history in number theory. We’ll review Conway’s classification of topographs into 4 types and look at some new discoveries. Applications are to new class number formulas and a simplification of a proof of Gauss related to sums of three squares. We’ll also see how several infinite series over all the numbers in a topograph may be evaluated explicitly. This generalizes and extends results of Hurwitz and more recent authors and requires a certain Poincare series.  \nhttps://tu-darmstadt.zoom.us/j/68048280736 \nThe password is the first Fourier coefficient of the modular j-function (as digits) \n 
URL:https://crc326gaus.de/event/tba-121/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20241204
DTEND;VALUE=DATE:20241207
DTSTAMP:20260409T125423
CREATED:20240620T121454Z
LAST-MODIFIED:20240813T082546Z
UID:8851-1733270400-1733529599@crc326gaus.de
SUMMARY:Workshop: Combinatorial Christmas Geometry without Geometry
DESCRIPTION:
URL:https://crc326gaus.de/event/workshop-combinatorial-christmas-geometry-without-geometry/
LOCATION:Frankfurt am Main
CATEGORIES:GAUS-Workshop
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241205T111500
DTEND;TZID=Europe/Berlin:20241205T124500
DTSTAMP:20260409T125423
CREATED:20241105T134729Z
LAST-MODIFIED:20241105T134729Z
UID:9687-1733397300-1733402700@crc326gaus.de
SUMMARY:The direct summand theorem
DESCRIPTION:Talk 8: Marvin Schneider (Universität Heidelberg): Perfectoid spaces II: Tate acyclicity
URL:https://crc326gaus.de/event/the-direct-summand-theorem-5/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241205T141500
DTEND;TZID=Europe/Berlin:20241205T151500
DTSTAMP:20260409T125423
CREATED:20241002T101031Z
LAST-MODIFIED:20241126T120757Z
UID:9275-1733408100-1733411700@crc326gaus.de
SUMMARY:On the transcendental part of K3 surfaces associated with 3D Fano polytopes
DESCRIPTION:
URL:https://crc326gaus.de/event/tba-113/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241206T090000
DTEND;TZID=Europe/Berlin:20241206T110000
DTSTAMP:20260409T125423
CREATED:20241211T123516Z
LAST-MODIFIED:20241211T123516Z
UID:10147-1733475600-1733482800@crc326gaus.de
SUMMARY:Congruence Modules and the Wiles–Lenstra–Diamond Numerical Criterion in Higher Codimension
DESCRIPTION:Sriram Chinthalagiri Venkata (Universität Heidelberg): Tate resolutions
URL:https://crc326gaus.de/event/congruence-modules-and-the-wiles-lenstra-diamond-numerical-criterion-in-higher-codimension-4/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241206T110000
DTEND;TZID=Europe/Berlin:20241206T120000
DTSTAMP:20260409T125423
CREATED:20241202T083638Z
LAST-MODIFIED:20241202T084811Z
UID:10043-1733482800-1733486400@crc326gaus.de
SUMMARY:Tropical refined curve counting and mirror symmetry
DESCRIPTION:Dr. Qaasim Shafi\, postdoctoral research associate at Heidelberg University
URL:https://crc326gaus.de/event/tropical-refined-curve-counting-and-mirror-symmetry-2/
LOCATION:Heidelberg\, MATHEMATIKON\, SR 10\, INF 205\, Heidelberg\, 69124\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Bernhard Oberdieck":MAILTO:georgo@uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241206T133000
DTEND;TZID=Europe/Berlin:20241206T143000
DTSTAMP:20260409T125423
CREATED:20241113T103034Z
LAST-MODIFIED:20241126T102503Z
UID:9832-1733491800-1733495400@crc326gaus.de
SUMMARY:Chow-Heegner Points and Artin Formalism for triple product p-adic L-functions
DESCRIPTION:Kazim Büyükboduk (University College Dublin) \nI will discuss the factorization of a certain triple product p-adic L-function whose interpolation range is empty. The said factorization reflects the Artin formalism for the underlying family of motives (that decompose as the sum of 2 motives of respective degrees 2 and 6). I will explain how this factorization problem can be recast as the comparison of two families of arithmetic GGP conjectures (and can be proved in some cases using this reduction).
URL:https://crc326gaus.de/event/chow-heegner-points-and-artin-formalism-for-triple-product-p-adic-l-functions/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241206T153000
DTEND;TZID=Europe/Berlin:20241206T170000
DTSTAMP:20260409T125423
CREATED:20241016T112752Z
LAST-MODIFIED:20241118T122001Z
UID:9357-1733499000-1733504400@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Christopher Lang (TU Darmstadt): Ekedahl-Oort Stratification of Deligne-Lusztig Varieties \nWhen developing a stratificaion of Rapoport-Zink spaces\, Vollaard and\nWedhorn constructed a decomposition of a certain Deligne-Lusztig variety\nfor a unitary group using smaller Deligne-Lusztig varieties. We will show\nthat this decomposition can be obtained by pullback of the Ekedahl-Oort\nstratification of G-Zips. With this method one gets an Ekedahl-Oort\nstratification of flag varieties for reductive groups\, which refines the\nusual stratification by Deligne-Lusztig varieties. \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-16/
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:20241210T140000
DTEND;TZID=Europe/Berlin:20241210T153000
DTSTAMP:20260409T125423
CREATED:20241108T103213Z
LAST-MODIFIED:20241108T103213Z
UID:9766-1733839200-1733844600@crc326gaus.de
SUMMARY:Vector bundles on curves
DESCRIPTION:Christopher Lang: Vector bundles in families \nZoom (612 2072 7363\, Password: largest six digit prime number)
URL:https://crc326gaus.de/event/vector-bundles-on-curves-7/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241211T120000
DTEND;TZID=Europe/Berlin:20241211T133000
DTSTAMP:20260409T125423
CREATED:20241209T081958Z
LAST-MODIFIED:20241211T135949Z
UID:10110-1733918400-1733923800@crc326gaus.de
SUMMARY:Hodge Theory
DESCRIPTION:Tom Bachmann (Universität Mainz): Pure Hodge structures
URL:https://crc326gaus.de/event/hodge-theory-2/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241212T111500
DTEND;TZID=Europe/Berlin:20241212T124500
DTSTAMP:20260409T125423
CREATED:20241105T134933Z
LAST-MODIFIED:20241105T134933Z
UID:9689-1734002100-1734007500@crc326gaus.de
SUMMARY:The direct summand theorem
DESCRIPTION:Talk 9:  Christian Dahlhausen (Universität Heidelberg): The almost purity theorem
URL:https://crc326gaus.de/event/the-direct-summand-theorem-6/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241212T140000
DTEND;TZID=Europe/Berlin:20241212T163000
DTSTAMP:20260409T125423
CREATED:20241105T092951Z
LAST-MODIFIED:20241105T092951Z
UID:9653-1734012000-1734021000@crc326gaus.de
SUMMARY:Moduli of Quiver Representations and GIT Quotients
DESCRIPTION:14:00 – 15:00 Talk 3.1: Miguel Prado (Goethe Universität): Introduction to Quivers and Properties I \nCoffee break \n15:30 – 16:30 Talk 3.2: Jeonghoon So (Goethe Universität): Introduction to Quivers and Properties II
URL:https://crc326gaus.de/event/moduli-of-quiver-representations-and-git-quotients-3/
LOCATION:Frankfurt\, Robert-Mayer-Str. 6-8\, Raum 309
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241212T141500
DTEND;TZID=Europe/Berlin:20241212T151500
DTSTAMP:20260409T125423
CREATED:20241126T121001Z
LAST-MODIFIED:20241204T104303Z
UID:10010-1734012900-1734016500@crc326gaus.de
SUMMARY:The heart fan of an abelian category
DESCRIPTION:David Ploog (Stavanger) \nAbstract: To an abelian category such as coherent sheaves on a projective variety or modules over a finite-dimensional algebra\, I associate a fan of convex cones. This fan reflects homological properties of the category. It contains the g-fan of representation theory and is related to the stability conditions.
URL:https://crc326gaus.de/event/tba-133/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241213T090000
DTEND;TZID=Europe/Berlin:20241213T110000
DTSTAMP:20260409T125423
CREATED:20241211T123651Z
LAST-MODIFIED:20241211T123651Z
UID:10149-1734080400-1734087600@crc326gaus.de
SUMMARY:Congruence Modules and the Wiles–Lenstra–Diamond Numerical Criterion in Higher Codimension
DESCRIPTION:Gebhard Böckle (Universität Heidelberg): Congruence modules and Wiles defect under surjections
URL:https://crc326gaus.de/event/congruence-modules-and-the-wiles-lenstra-diamond-numerical-criterion-in-higher-codimension-5/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241213T110000
DTEND;TZID=Europe/Berlin:20241213T120000
DTSTAMP:20260409T125423
CREATED:20241111T144113Z
LAST-MODIFIED:20241206T101054Z
UID:9824-1734087600-1734091200@crc326gaus.de
SUMMARY:Wall crossing for equivariant CY3 categories
DESCRIPTION:Nikolas Kuhn (University of Oxford) \nThe Joyce-Song wall-crossing formulas for Donaldson-Thomas invariants of Calabi-Yau threefolds have proven to be a crucial and versatile tool. In the presence of a torus action\, there are interesting threefold geometries in which the Calabi-Yau condition only holds up to an equivariant twist – examples include Vafa-Witten invariants\, local curves and surfaces and the threefold vertex. In these cases\, invariants are defined using localization\, and Joyce-Song’s theory doesn’t apply. I will explain how ideas from Joyce’s recent work on wall-crossing in abelian categories can be used to prove wall-crossing in this situation\, and which difficulties arise.  This is joint work with Henry Liu and Felix Thimm.
URL:https://crc326gaus.de/event/tba-127/
LOCATION:Heidelberg\, MATHEMATIKON\, SR10\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Bernhard Oberdieck":MAILTO:georgo@uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241213T133000
DTEND;TZID=Europe/Berlin:20241213T143000
DTSTAMP:20260409T125423
CREATED:20241203T120958Z
LAST-MODIFIED:20241203T120958Z
UID:10064-1734096600-1734100200@crc326gaus.de
SUMMARY:Resolution of non-singularities and anabelian applications
DESCRIPTION:Emmanuel Lepage (IMJ Paris) \nAbstract: In various anabelian settings over p-adic fields\, one can reconstruct from the fundamental group of a hyperbolic curve the dual graph of the stable reduction of the curve\, and one can get more anabelian information on the curve by applying it to various finite étale covers. For each such finite étale cover\, this graph defines a retract of the analytic space associated to the curve (in the adic or Berkovich sense)\, and resolution of non-singularities predicts that the Berkovich space is homeomorphic to the inverse limit of all these retracts. This was proven in 2023 by Mochizuki and Tsujimura over finite extensions of Q_p. I will try to give a sketch of their proof and explain how to deduce a characterization of geometric Galois sections.
URL:https://crc326gaus.de/event/resolution-of-non-singularities-and-anabelian-applications/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Tim Holzschuh":MAILTO:tholzschuh@mathi.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241213T153000
DTEND;TZID=Europe/Berlin:20241213T170000
DTSTAMP:20260409T125423
CREATED:20241016T112848Z
LAST-MODIFIED:20241206T102319Z
UID:9358-1734103800-1734109200@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Thomas Nikolaus (Universität Münster): (Relative) Prismatic cohomology\, K-Theory and Topology\nWe will explain the theory of relative prismatic cohomology (relative to a delta ring) and how this is an essential tool in computations of prismatic cohomology. If time allows we will exlain how this connects to K-Theory and other Homotopy-theoretically defined invariants (such as TP and TR) and to the relative de Rham Witt complex.  \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-17/
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:20241217T160000
DTEND;TZID=Europe/Berlin:20241217T170000
DTSTAMP:20260409T125423
CREATED:20241206T085241Z
LAST-MODIFIED:20241206T085728Z
UID:10101-1734451200-1734454800@crc326gaus.de
SUMMARY:p-adic higher Green's functions for Stark-Heegner Cycles
DESCRIPTION:International Seminar on Automorphic Forms \nHazem Hassan (McGill) \nHeegner Cycles are higher weight generalizations of Heegner points on Modular curves. As such\, one expects them to capture similar arithmetic and modular properties to Heegner points. The higher dimensional nature of Heegner cycles makes them less amenable to algebro-geometric and deformation theoretic approaches. I will introduce Stark-Heegner Cycles\, which are a conjectural analogue to Heegner Cycles in the theory of Real Multiplication. They are defined through p-adic analytic means. Then\, I will describe a p-adic pairing on these cycles which behaves as a local height pairing. When one of the cycles is principal\, the pairing computationally seems to produce algebraic integers living in class fields of real quadratic fields. \nhttps://tu-darmstadt.zoom.us/j/68048280736 \nThe password is the first Fourier coefficient of the modular j-function (as digits)
URL:https://crc326gaus.de/event/p-adic-higher-greens-functions-for-stark-heegner-cycles/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241218T120000
DTEND;TZID=Europe/Berlin:20241218T133000
DTSTAMP:20260409T125423
CREATED:20241209T083017Z
LAST-MODIFIED:20241211T142525Z
UID:10113-1734523200-1734528600@crc326gaus.de
SUMMARY:Hodge Theory
DESCRIPTION:Nutsa Gegelia (Universität Mainz): Variations of Hodge structures I
URL:https://crc326gaus.de/event/hodge-theory-3/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241219T111500
DTEND;TZID=Europe/Berlin:20241219T124500
DTSTAMP:20260409T125423
CREATED:20241105T135912Z
LAST-MODIFIED:20241105T135912Z
UID:9693-1734606900-1734612300@crc326gaus.de
SUMMARY:The direct summand theorem
DESCRIPTION:Talk 10: Max Witzelsperger (Universität Heidelberg): The direct summand theorem
URL:https://crc326gaus.de/event/the-direct-summand-theorem-7/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241219T140000
DTEND;TZID=Europe/Berlin:20241219T163000
DTSTAMP:20260409T125423
CREATED:20241105T093821Z
LAST-MODIFIED:20241105T093821Z
UID:9655-1734616800-1734625800@crc326gaus.de
SUMMARY:Moduli of Quiver Representations and GIT Quotients
DESCRIPTION:14:00 – 15:00 Talk 4.1: Arne Kuhrs (Goethe Universität): Affine Moduli Spaces of Quiver Representations \nCoffee break \n15:30 – 16:30 Talk 4.2: Johannes Horn (Goethe Universität): Moduli Spaces of Quiver Representations
URL:https://crc326gaus.de/event/moduli-of-quiver-representations-and-git-quotients-4/
LOCATION:Frankfurt\, Rober-Mayer-Str. 10\, Raum 711 klein
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241219T140000
DTEND;TZID=Europe/Berlin:20241219T173000
DTSTAMP:20260409T125423
CREATED:20241105T091029Z
LAST-MODIFIED:20241120T141311Z
UID:9644-1734616800-1734629400@crc326gaus.de
SUMMARY:Anabelian geometry - Mochizuki’s proof of the Hom-Conjecture [d’après Faltings]
DESCRIPTION:14:00 – 15:30 Talk 4: Marius Leonhardt (Goethe Universität): Construction of 𝔥 and Hodge-Tateness of rational sections \nCoffee break \n16:00 – 17:30 Talk 5: Morten Lüders (Universität Heidelberg): Bloch-Kato Selmer groups
URL:https://crc326gaus.de/event/anabelian-geometry-mochizukis-proof-of-the-hom-conjecture-dapres-faltings-2/
LOCATION:Frankfurt\, Robert-Mayer-Str. 6-8\, Raum 309
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241219T141500
DTEND;TZID=Europe/Berlin:20241219T151500
DTSTAMP:20260409T125423
CREATED:20241216T082051Z
LAST-MODIFIED:20241217T100459Z
UID:10229-1734617700-1734621300@crc326gaus.de
SUMMARY:Explicit methods for enumerative invariants using Siegel and mock modular forms: The K3 case
DESCRIPTION:Abhiram Kidambi (MPI Leipzig) \nAbstract: A conjecture for nearly two decades on the interface of algebraic geometry\, number theory and topological string theory is the OSV conjecture which conjectures a form for the generating function of (certain) rank 0 Donaldson-Thomas invariants for CY threefolds\, and this formulation goes hand in hand with understanding wall crossing phenomena. On the automorphic forms side\, one often encounters mock modular forms and iterated integrals thereof. To understand the precise relation between mock-modularity\, OSV conjecture is an open problem as well. \nThere are many problems in the same spirit\, and we will visit the problem in the case of K3 surfaces and symmetric powers thereof.  This case is a particularly nice exercise since the analogue of the OSV conjecture is a bit more restrictive (because there is only one polynomial term in the formal power series expansion which is needed to compute the enumerative invariants). This allows us to compute things rather explicitly using the theory of mock modular/Jacobi forms. Of particular interest are special points (called attractor points) where the generating function for enumerative invariants follow an OSV-type behaviour. \nIn this (chalk) talk\, I will start with the statement of the problem for this particular case\, introduce all the necessary objects (Siegel modular forms\, mock modular forms\, Jacobi forms) and explain how one can construct the generating function for enumerative invariants at special points (and generic points if time permits). \nA conjecture for nearly two decades on the interface of algebraic geometry\, number theory and topological string theory is the OSV conjecture which conjectures a form for the generating function of (certain) rank 0 Donaldson-Thomas invariants for CY threefolds\, and this formulation goes hand in hand with understanding wall crossing phenomena. On the automorphic forms side\, one often encounters mock modular forms and iterated integrals thereof. To understand the precise relation between mock-modularity\, OSV conjecture is an open problem as well. \nThere are many problems in the same spirit\, and we will visit the problem in the case of K3 surfaces and symmetric powers thereof.  This case is a particularly nice exercise since the analogue of the OSV conjecture is a bit more restrictive (because there is only one polynomial term in the formal power series expansion which is needed to compute the enumerative invariants). This allows us to compute things rather explicitly using the theory of mock modular/Jacobi forms. Of particular interest are special points (called attractor points) where the generating function for enumerative invariants follow an OSV-type behaviour. \nIn this (chalk) talk\, I will start with the statement of the problem for this particular case\, introduce all the necessary objects (Siegel modular forms\, mock modular forms\, Jacobi forms) and explain how one can construct the generating function for enumerative invariants at special points (and generic points if time permits).
URL:https://crc326gaus.de/event/tba-138/
LOCATION:Mainz\, Hilbertraum (05-432)
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241220T090000
DTEND;TZID=Europe/Berlin:20241220T110000
DTSTAMP:20260409T125423
CREATED:20241211T123827Z
LAST-MODIFIED:20241211T123827Z
UID:10151-1734685200-1734692400@crc326gaus.de
SUMMARY:Congruence Modules and the Wiles–Lenstra–Diamond Numerical Criterion in Higher Codimension
DESCRIPTION:Junyan Xu (Universität Heidelberg): Wiles defect and free direct summands
URL:https://crc326gaus.de/event/congruence-modules-and-the-wiles-lenstra-diamond-numerical-criterion-in-higher-codimension-6/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241220T110000
DTEND;TZID=Europe/Berlin:20241220T120000
DTSTAMP:20260409T125423
CREATED:20241112T144032Z
LAST-MODIFIED:20241202T084543Z
UID:9827-1734692400-1734696000@crc326gaus.de
SUMMARY:Euler characteristics of moduli of twisted sheaves on Enriques surfaces
DESCRIPTION:Weisheng Wang\, Utrecht Geometry Center (Utrecht University)
URL:https://crc326gaus.de/event/tba-128/
LOCATION:Heidelberg\, MATHEMATIKON\, SR10\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Bernhard Oberdieck":MAILTO:georgo@uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241220T133000
DTEND;TZID=Europe/Berlin:20241220T143000
DTSTAMP:20260409T125423
CREATED:20241211T131037Z
LAST-MODIFIED:20241211T131037Z
UID:10163-1734701400-1734705000@crc326gaus.de
SUMMARY:On local Galois deformation rings
DESCRIPTION:Julian Quast (Universität Duisburg-Essen) \nIn joint work with Vytautas Paškūnas\, we show that the universal framed\ndeformation ring of an arbitrary mod p representation of the absolute\nGalois group of a p-adic local field valued in a possibly disconnected\nreductive group G is flat\, local complete intersection and of the\nexpected dimension. In particular\, any such mod p representation has a\nlift to characteristic 0. The work extends results of Böckle\, Iyengar\nand Paškūnas in the case G=GL_n. We give an overview of the proof of\nthis main result.
URL:https://crc326gaus.de/event/on-local-galois-deformation-rings/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241220T153000
DTEND;TZID=Europe/Berlin:20241220T170000
DTSTAMP:20260409T125423
CREATED:20241016T112937Z
LAST-MODIFIED:20241210T101446Z
UID:9359-1734708600-1734714000@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Can Yaylali (TU Darmstadt): A^1-homotopy theory of rigid analytic spaces\nIn this talk\, I will report about work with Christian Dahlhausen (Heidelberg) on A^1-homotopy theory of rigid analytic spaces. The B^1-homotopy category has already been defined and studied by Ayoub and a full six-functor formalism was established by Ayoub-Gallauer-Vezzani. One drawback of the B^1-invariant theory is that analytic K-theory for rigid analytic spaces (as defined and studied by Kerz-Saito-Tamme) is not representable since it is not B^1-invariant. Thus we aim for an A^1-invariant version with coefficients in any presentable category. For the stable theory\, we can prove the existence of a partial six-functor formalism for analytifications of schemes and algebraic morphisms between them by using the results of Ayoub’s thesis. Furthermore\, using coefficients in condensed spectra\, we can represent analytic K-theory as the P^1-ring spectrum Z x BGL. If time permits I will also highlight some of the remaining questions. \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-18/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
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END:VCALENDAR