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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260626T133000
DTEND;TZID=Europe/Berlin:20260626T143000
DTSTAMP:20260521T093535Z
CREATED:20260519T090513Z
LAST-MODIFIED:20260521T093535Z
UID:13425-1782480600-1782484200@crc326gaus.de
SUMMARY:Elliptic curves attached to abelian threefolds with imaginary multiplication
DESCRIPTION:Pip Goodman (University of Barcelona) \nLet A be an abelian threefold defined over a number field K whose endomorphism algebra is isomorphic to an imaginary quadratic field M. In recent joint work with Fité\, we proved the existence of an elliptic curve E defined over K with CM by M such that for any prime \ell\, the twisted Tate module V_\ell(E) (1)  is a sub representation of \wedge^3 V_\ell(A).\nIn this talk I will give an overview of the proof of the above result and present work in progress with Chidambaram and Fité where we provide explicit families of examples of the above phenomenon.
URL:https://crc326gaus.de/event/elliptic-curves-attached-to-abelian-threefolds-with-imaginary-multiplication/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260626T140000
DTEND;TZID=Europe/Berlin:20260626T150000
DTSTAMP:20260622T092934Z
CREATED:20260427T115524Z
LAST-MODIFIED:20260622T092934Z
UID:13242-1782482400-1782486000@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Konstantin Jakob (Darmstadt): Algebraic Loops and Stokes Braids \nThe irregular class of a rank n differential equation with an irregular singularity may be viewed as a polynomial map to the configuration space of n points. Such irregular classes feature prominently in Boalch’s construction of wild character varieties\, which are Betti moduli spaces for irregular connections. As the local coordinate winds around the singularity\, the irregular class describes the motion of eigenvalues of leading terms; this motion determines a braid\, called the Stokes braid. \nI will report on joint work with Masoud Kamgarpour and Ian Le in which we classify braids arising from such algebraic loops in terms of valuation data. I will explain why tropical geometry provides the natural language for this question\, and\, if time permits\, outline relations to several phenomena where the geometry or cohomology of spaces such as braid varieties is expected to depend only on tropical data. \nBitte früheren Beginn um 14:30 beachten.\nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-39/
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:20260626T140000
DTEND;TZID=Europe/Berlin:20260626T160000
DTSTAMP:20260615T070624Z
CREATED:20260615T070624Z
LAST-MODIFIED:20260615T070624Z
UID:13580-1782482400-1782489600@crc326gaus.de
SUMMARY:The Morrison-Kawamata-Cone conjecture for Enriques surfaces in any characteristic
DESCRIPTION:Let X be a normal projective variety over an algebraically closed field and with numerically trivial canonical bundle\, for instance a Calabi-Yau manifold. The Morrison – Kawamata cone conjecture predicts that the automorphism group of X acts with a rational polyhedral fundamental domain on the effective nef cone of X. We give a new proof of the Morrison–Kawamata cone conjecture for Enriques surfaces independent of their characteristic. It is based on the analysis of certain generically finite morphisms of degree two. This is joint work with Gebhard Martin and Tobias Schnieders.
URL:https://crc326gaus.de/event/the-morrison-kawamata-cone-conjecture-for-enriques-surfaces-in-any-characteristic/
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:20260701T164500
DTEND;TZID=Europe/Berlin:20260701T180000
DTSTAMP:20260618T095221Z
CREATED:20260618T074712Z
LAST-MODIFIED:20260618T095221Z
UID:13613-1782924300-1782928800@crc326gaus.de
SUMMARY:Transfer theorems between fields of different characteristic — a model-theoretic approach
DESCRIPTION:Franziska Jahnke (Universität Münster) \nFrankfurter Seminar \nAbstract: Under which circumstances can we use insights about fields of positive characteristic to understand fields of characteristic 0 (and conversely)?\nClassical methods to transfer results between fields of different  characteristics are the Lefshetz principle and the Ax Kochen/Ershov Theorem which states that asymptotically\, the theory of the p-adic numbers ℚp and of power series fields 𝔽p((t)) coincide. Tilting perfectoid fields gives a transfer principle between certain henselian fields of mixed characteristic and their positive characteristic counterparts and vice versa. In this talk\, we survey various transfer principles and present a model-theoretic approach to tilting via ultraproducts\, which allows us to transfer many first-order properties between a perfectoid field and its tilt. \n 
URL:https://crc326gaus.de/event/transfer-theorems-between-fields-of-different-characteristic-a-model-theoretic-approach/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260702T131500
DTEND;TZID=Europe/Berlin:20260702T141500
DTSTAMP:20260630T120545Z
CREATED:20260529T093017Z
LAST-MODIFIED:20260630T120545Z
UID:13473-1782998100-1783001700@crc326gaus.de
SUMMARY:AGTZ Kolloquium
DESCRIPTION:Markus Spitzweg (Uni Osnabrück) \nTitel: From Tannakian to motivic categories \nAbstract:\nThe envisioned abelian category of mixed motives over a field with rational coefficients should be a tannakian category following ideas of Grothendieck and Deligne. We will shortly review this concept and some universal properties of specific tannakian categories. Similar universal properties also make sense for stable categories. We will enlarge a corresponding result of Iwanari for the general linear group to orthogonal and symplectic groups and give applications to categories of etale motives.\nThis is joint work in progress with Hadrian Heine.
URL:https://crc326gaus.de/event/agtz-kolloquium-8/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Tamme":MAILTO:georg.tamme@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260703T090000
DTEND;TZID=Europe/Berlin:20260703T103000
DTSTAMP:20260626T073418Z
CREATED:20260626T063317Z
LAST-MODIFIED:20260626T073418Z
UID:13681-1783069200-1783074600@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Yujie Xu (Columbia University): On Hecke algebras for p-adic groups and applications to the local Langlands correspondence \nI will talk about several results on Hecke algebras attached to Bernstein blocks of arbitrary reductive p-adic groups\, and their applications to the local Langlands program. One such application is an explicit understanding of the (classical) arithmetic Local Langlands correspondence with explicit L-packets. Another such application involves various categorical “upgrades”\, for example\, an equivalence between module categories of Hecke algebras arising from both the automorphic and the spectral sides. Last but not least\, I will talk about a categorical local Langlands correspondence featuring certain coherent Springer sheaves on moduli spaces of Langlands parameters\, and prove a fully faithful functor from the automorphic side to the spectral side.\nParts of the talk are based on recent joint work with David Helm and Maarten Solleveld. \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-41/
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:20260703T140000
DTEND;TZID=Europe/Berlin:20260703T160000
DTSTAMP:20260624T100120Z
CREATED:20260624T100120Z
LAST-MODIFIED:20260624T100120Z
UID:13668-1783087200-1783094400@crc326gaus.de
SUMMARY:Fibering out Calabi-Yau motives\, the asymptotic of higher genus invariants and black hole physics
DESCRIPTION:Mirror symmetry implies that the higher genus Gromov-Witten (GW)\, Pandharipande-Thomas (PT) and\ncertain Donaldson-Thomas (DT) invariants on the A-model side are encoded in generating functions which are related to analytic\nsections of line bundles over the complex moduli space on the B-model side constructed from the periods. This relates the\nasymptotic behaviour of the invariants as extracted at the point of maximal unipotent monodromy to the behaviour of these sections\nnear the closest singularities\, typically a conifold. Here the relevant analytic information is encoded in closed and open\nmodular period integrals over the modular domain of $\Gamma_0(N)$. The latter structures are determined by properties\nof the degenerate Calabi-Yau motive in the conifold fibre\, which have been proven by the fibering out technique with B\”onisch and\nGolyshev. We comment on the implications of the asymptotic behaviour of the symplectic invariants for the estimates of the\nmicroscopic entropy of supersymmetric black holes and black rings as investigated recently with Alexandrov and Pioline.
URL:https://crc326gaus.de/event/fibering-out-calabi-yau-motives-the-asymptotic-of-higher-genus-invariants-and-black-hole-physics/
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:20260709T141500
DTEND;TZID=Europe/Berlin:20260709T151500
DTSTAMP:20260626T062709Z
CREATED:20260529T093132Z
LAST-MODIFIED:20260626T062709Z
UID:13475-1783606500-1783610100@crc326gaus.de
SUMMARY:AGTZ Kolloquium
DESCRIPTION:Konstantin Emming (Wayne State University) \nTitle: Filtrations in C-motivic stable homotopy theory \nEmpirical evidence suggests that there is an interesting class of motivic spectra (containing  for example the sphere spectrum and Hermitian K-theory) whose effective  motivic slices are indexed by the Adams-Novikov E_2-page of their Betti realizations. In this talk\, we will show that there are more C-motivic spectra satisfying this property. For example\, the C-motivic modular forms spectrum mmf. Our approach to this problem will also recompute the slices of the aforementioned spectra. \nThe results rely on the filtered spectrum model for C-motivic (stable\, cellular\, 2-complete) homotopy theory due to Gheorghe-Isaksen-Krause-Ricka. We construct filtered spectrum models for the effective filtration and use these to compute the effective slices. \nIf time permits\, we will also consider other motivic filtrations such as the one coming from Morel’s homotopy t-structure\, or Spitzweck-Østvær’s very effective filtration. We will then provide filtered spectrum versions of these filtrations in C-motivic homotopy theory.
URL:https://crc326gaus.de/event/agtz-kolloquium-9/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Tamme":MAILTO:georg.tamme@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260710T133000
DTEND;TZID=Europe/Berlin:20260710T143000
DTSTAMP:20260625T090509Z
CREATED:20260618T075048Z
LAST-MODIFIED:20260625T090509Z
UID:13617-1783690200-1783693800@crc326gaus.de
SUMMARY:p-adic singular moduli and higher Green’s functions
DESCRIPTION:Hazem Hassan (Mc Gill University / Universität Heidelberg) \n\nHeegner cycles are the higher weight analogues to Heegner points. Those points and cycles play an important role in the theory of complex multiplication and of the arithmetic of elliptic curves of rank 1. Stark-Heegner points are conjectural points on elliptic curves which would be the real-quadratic counterparts to Heegner points in the emerging theory of real multiplication. In this theory\, Darmon-Vonk’s rigid meromorphic cocycles seem to be the real-quadratic analogue of singular moduli.\n\nI will present a generalization of rigid meromorphic cocycles to higher weight and use it to define a p-adic higher Green’s functions on real-quadratic points. This construction is motivated by the recently resolved conjecture by Gross and Zagier  on the algebraicity of values of complex higher Green’s functions. I will present a conjecture on the algebraicity of values of the p-adic Green’s functions that has been numerically verified. The values of the p-adic Green’s function are best envisioned as p-adic local intersection numbers of certain conjectured cycles associated to RM-points\, the so-called Stark-Heegner cycles.
URL:https://crc326gaus.de/event/p-adic-singular-moduli-and-higher-greens-functions/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260710T140000
DTEND;TZID=Europe/Berlin:20260710T160000
DTSTAMP:20260706T073953Z
CREATED:20260706T073953Z
LAST-MODIFIED:20260706T073953Z
UID:13741-1783692000-1783699200@crc326gaus.de
SUMMARY:Calculations and questions related to universal moduli spaces of bundles on curves
DESCRIPTION:I will explain some recent developments related to the universal moduli spaces of bundles on curves. Most results are for the case of the universal Jacobians (with the most complete descriptions by Bae-Pixton).
URL:https://crc326gaus.de/event/calculations-and-questions-related-to-universal-moduli-spaces-of-bundles-on-curves/
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:20260710T150000
DTEND;TZID=Europe/Berlin:20260710T170000
DTSTAMP:20260713T101547Z
CREATED:20260427T115635Z
LAST-MODIFIED:20260713T101547Z
UID:13244-1783695600-1783702800@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Vukašin Mihajlović (Darmstadt): Central Sheaves for Ramified Groups \nOne of the main obstacles with trying to transfer classical results in geometric representation theory to the language of motives is the lack of a good notion of t-structure on the full category DM which would play the role of the perverse t-structure in the classical setting. However\, when the spaces considered have stratifications with a nice enough geometry\, one can still formulate some results motivically by restricting our category of motivic sheaves to certain nice subcategories\, like those of Tate or Artin-Tate motives. However\, these subcategories don’t automatically inherit the good categorical properties of DM\, as they are not stable under the six operations. Here is where one needs to prove\, by looking into the geometry of our problem more carefully\, that the functors of interest to our setup do indeed preserve these subcategories. In this talk\, we will do this for the case of the central functor applied to the BD Grassmannian of a twisted group. \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-copy-3/
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:20260717T150000
DTEND;TZID=Europe/Berlin:20260717T170000
DTSTAMP:20260713T101639Z
CREATED:20260427T115730Z
LAST-MODIFIED:20260713T101639Z
UID:13247-1784300400-1784307600@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Yanik Kleibrink (Darmstadt): Period Maps from Log Prismatic Realization Functors \nI will start by surveying the recent development of logarithmic prismatic cohomology by Koshikawa and Yao that extends the original work by Bhatt and Scholze. In particular\, I will introduce the logarithmic prismatic realization functor for toroidal compactifications of integral canonical models of Shimura varieties of Hodge type constructed by Inoue\, which extends the realization functor of Imai\, Kato\, and Youcis. Using this realization functor\, I will present work-in-progress concerning the definition of a mod \(p\)-period map of the special fiber of an integral canonical model of Shimura variety of Hodge type to the stack of \(G\Zip\)s. Ideally\, this construction coincides with an existing construction by Goldring and Koskivirta and enables the usage of prismatic methods in the study of Ekedahl-Oort strata. \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-40/
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:20260729T160000
DTEND;TZID=Europe/Berlin:20260729T180000
DTSTAMP:20260721T070136Z
CREATED:20260701T085833Z
LAST-MODIFIED:20260721T070136Z
UID:13706-1785340800-1785348000@crc326gaus.de
SUMMARY:Oberseminar Algebra und Geometrie
DESCRIPTION:Menelaos Zikidis (University of Pittsburgh): Joyce Structures on Moduli of Quadratic Differentials \nAbstract: Joyce Structures are the output of Bridgeland’s largely conjectural program aiming to encode the DT- invariants of triangulated CY3 categories in a geometric structure over their space of stability conditions\, akin to Frobenius structures in GW-theory. In this talk I will concentrate on the main class of examples we can currently construct a Joyce structure\, namely on certain categories associated to quivers with potential. In those cases\, the space of stability conditions becomes the moduli of meromorphic quadratic differentials on wild algebraic curves and Joyce structures arise as isomonodromy connections on a space parametrising irregular parabolic Higgs bundles and flat connections\, a model resembling a complexification of the Hitchin system. These structures naturally give rise to a class of complex Hyperkähler manifolds and admit a twistor space description. \n  \n 
URL:https://crc326gaus.de/event/oberseminar-algebra-und-geometrie-11/
LOCATION:Frankfurt\, Robert-Mayer-Str. 6-8\, Raum 309
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261006T200000
DTEND;TZID=Europe/Berlin:20261006T213000
DTSTAMP:20260917T131839Z
CREATED:20260917T131839Z
LAST-MODIFIED:20260917T131839Z
UID:14183-1791316800-1791322200@crc326gaus.de
SUMMARY:AI and the Future of Mathematics
DESCRIPTION:Andreas Thom (TU Dresden): The challenges we face \nA joint seminar of TRR 326\, TRR 358\, CRC 1442\, and Mathematics Münster\, devoted specifically to the impact of AI on mathematics.
URL:https://crc326gaus.de/event/ai-and-the-future-of-mathematics/
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261013T180000
DTEND;TZID=Europe/Berlin:20261013T200000
DTSTAMP:20261007T121819Z
CREATED:20261007T121819Z
LAST-MODIFIED:20261007T121819Z
UID:14455-1791914400-1791921600@crc326gaus.de
SUMMARY:Mathematics as gift economy
DESCRIPTION:Michael Harris (Colombia University)
URL:https://crc326gaus.de/event/mathematics-as-gift-economy/
LOCATION:Heidelberg\, MATHEMATIKON\, Hörsaal
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261014T160000
DTEND;TZID=Europe/Berlin:20261014T180000
DTSTAMP:20260929T074355Z
CREATED:20260907T125847Z
LAST-MODIFIED:20260929T074355Z
UID:14008-1791993600-1792000800@crc326gaus.de
SUMMARY:Oberseminar Algebra und Geometrie
DESCRIPTION:Remy van Dobben de Bruyn (MPI for Mathematics\, Bonn): A condensed proof of the étale and pro-étale exodromy correspondences \nAbstract: The category of locally constant étale sheaves on a scheme is controlled by the étale fundamental group\, via the monodromy correspondence. Following ideas of MacPherson\, this was upgraded to an “exodromy correspondence” for constructible étale sheaves by Barwick\, Glasman\, and Haine in 2018. While the statement is purely algebro-geometric\, their proof ventures deep into higher topos theory. I will present a direct geometric proof via condensed mathematics.
URL:https://crc326gaus.de/event/oberseminar-algebra-und-geometrie-12/
LOCATION:Frankfurt\, Robert-Mayer-Str. 6-8\, Raum 309
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261016T133000
DTEND;TZID=Europe/Berlin:20261016T143000
DTSTAMP:20260925T130606Z
CREATED:20260925T130606Z
LAST-MODIFIED:20260925T130606Z
UID:14254-1792157400-1792161000@crc326gaus.de
SUMMARY:Cartier Crystals and dual-constructible p-torsion complexes
DESCRIPTION:Kay Rülling (Universität Wuppertal) \nAbstract:\nOn noetherian F-finite \F_p-schemes\, the class of constructible étale \Z/p^n-sheaves contains the constant sheaf \Z/p^n and is stable under higher direct images along proper maps.\nContrary to the \ell-torsion situation the twisted sheaves \Z/p^n(j) are not constructible.\nIn this talk we introduce dual constructible p-torsion complexes\, which contain only the top twisted sheaves\, are stable under higher direct images along arbitrary separated morphisms of finite type\, and are dual under Kato duality to the constructible complexes of \Z/p^n-sheaves. The proof uses a Riemann-Hilbert style equivalence between the derived category of Cartier crystals introduced by Blickle-Böckle and the category of dual constructible complexes\, which by an argument involving Grothendieck and Kato-duality is reduced to a version of the classical Riemann-Hilbert Theorem for \F_p-sheaves by Emerton-Kisin and Böckle-Pink. This is joint work with Jefferson Baudin.
URL:https://crc326gaus.de/event/cartier-crystals-and-dual-constructible-p-torsion-complexes/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261020T200000
DTEND;TZID=Europe/Berlin:20261020T213000
DTSTAMP:20260917T132027Z
CREATED:20260917T132027Z
LAST-MODIFIED:20260917T132027Z
UID:14185-1792526400-1792531800@crc326gaus.de
SUMMARY:AI and the Future of Mathematics
DESCRIPTION:Ken Ono (University of Virginia and Axiom Math): Mathematics in the Age of AI: Discovery\, Reasoning\, Verification\, and Unease \nA joint seminar of TRR 326\, TRR 358\, CRC 1442\, and Mathematics Münster\, devoted specifically to the impact of AI on mathematics.
URL:https://crc326gaus.de/event/ai-and-the-future-of-mathematics-2/
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261022T141500
DTEND;TZID=Europe/Berlin:20261022T151500
DTSTAMP:20261014T094957Z
CREATED:20260730T100430Z
LAST-MODIFIED:20261014T094957Z
UID:13884-1792678500-1792682100@crc326gaus.de
SUMMARY:AGTZ Kolloquium
DESCRIPTION:Damián De La Fuente (Uni Heidelberg) \nOn lower Bruhat Intervals in affine Weyl groups\nThe Bruhat order on a Weyl group arises naturally from geometry\, through inclusion relations among Schubert varieties\, but it can also be defined combinatorially in the broader context of Coxeter systems. It is of major importance in Kazhdan-Lusztig theory\, serving to define the remarkable Kazhdan-Lusztig basis and polynomials. Many fundamental questions about this partial order remain open; for instance\, the combinatorial invariance conjecture asserts that Kazhdan-Lusztig polynomials are entirely determined by the poset structure of the underlying Bruhat intervals. \nIn this talk we will focus on the study of lower Bruhat intervals (starting from the identity) for the case of affine Weyl groups and\, specifically\, on calculating their size. First\, I will describe certain lower intervals by decomposing them in terms of lattice points in permutohedra. In turn\, we will deduce a polynomial counting formula for the size of such intervals\, expressed as a linear combination of the volumes of the faces of this polytope. Secondly\, we will aim to generalize these results to almost all lower intervals: those arising from the lowest two-sided Kazhdan-Lusztig cell. The main object of study will be what we call “Paper Boat” sets\, which will serve as fundamental building blocks for these lower intervals. This work is part of an on-going collaboration with Federico Castillo\, Nicolás Libedinsky and David Plaza.
URL:https://crc326gaus.de/event/agtz-kolloquium-10/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Tamme":MAILTO:georg.tamme@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261023T153000
DTEND;TZID=Europe/Berlin:20261023T170000
DTSTAMP:20261001T074318Z
CREATED:20260917T123639Z
LAST-MODIFIED:20261001T074318Z
UID:14128-1792769400-1792774800@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Sean Cotner (University of Bonn): On the Fargues-Scholze local Langlands correspondence for Yu’s supercuspidals \nThere are several different approaches to the local Langlands\ncorrespondence\, which can be roughly grouped as “classical”\, “explicit”\,\nand “geometric”. Each of these has its own useful features\, and it is\nexpected that they all ultimately yield the same correspondence\, but this\nis far from clear. There has been a lot of work by many people comparing\nthe classical and geometric approaches\, and some partial work comparing\nthe other two pairs of approaches. I will discuss recent joint work with\nTony Feng which is focused on comparing the explicit and geometric\napproaches due to Kaletha and Fargues–Scholze\, respectively. Roughly\, we\nproceed by induction on the semisimple rank to reduce to the case of tori\,\nwhere the two approaches are known to agree. The main recent tools making\nthis argument possible are Feng’s modular functoriality and Scholze’s\nindependence of \ell. \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
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261029T141500
DTEND;TZID=Europe/Berlin:20261029T151500
DTSTAMP:20261023T090601Z
CREATED:20260730T100545Z
LAST-MODIFIED:20261023T090601Z
UID:13883-1793283300-1793286900@crc326gaus.de
SUMMARY:AGTZ Kolloquium
DESCRIPTION:Matteo Montagnani (Mainz) \nGeometric properties of analytic categories of sheaves \nIn algebraic geometry\, it is a well-established practice to study geometric properties of algebraic varieties through the study of certain categories of sheaves. For instance\, smooth algebraic varieties can be intrinsically characterized using Kontsevich’s notion of a smooth category. In this talk\, we discuss the key obstacles to adapting this categorical perspective to analytic geometry\, where classical sheaf-theoretic and tensor-product operations are not well-behaved. We then show how the framework of condensed mathematics\, introduced by Clausen and Scholze\, can be used to categorically characterize geometric properties of (rigid) analytic spaces.
URL:https://crc326gaus.de/event/agtz-kolloquium-11/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Tamme":MAILTO:georg.tamme@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261029T160000
DTEND;TZID=Europe/Berlin:20261029T180000
DTSTAMP:20261022T142949Z
CREATED:20261022T142449Z
LAST-MODIFIED:20261022T142949Z
UID:14693-1793289600-1793296800@crc326gaus.de
SUMMARY:Oberseminar Algebra und Geometrie
DESCRIPTION:Amine Koubaa (Leibniz Universität Hannover): Beauville Laszlo theorems for discretely ringed adic spaces \nAbstract: Let $(A\,A^+)$ be a discretely ringed Huber pair\, and let $f\in A$ be a non-zero divisor. Under mild conditions\, Bhatt proves the existence of an equivalence of $\infty$-categories \n\[\nD(A)\cong D(\hat{A}_f)\times_{D(\hat{A}_f[1/f])} D(A[1/f])\,\n\]\nwhich restricts to an equivalence of Categories\, originally proven by Beauville and Laszlo\,\n\[\n\textrm{Mod}(A)\cong \textrm{Mod}(\hat{A}_f)\times_{\textrm{Mod}(\hat{A}_f[1/f])} \textrm{Mod}(A[1/f]).\n\]\nTo remedy the absence of a category of quasi-coherent sheaves on discretely ringed adic space\, we prove a similar equivalence on the derived category of solid modules over analytic rings\, introduced by Clausen and Scholze\n\[\nD((A\,A^+)_\solid)\cong D((\hat{A}_f\,\hat{A}_f^+)_\solid)\times_{D((\hat{A}_f[1/f]\,\hat{A}_f^+[1/f])_\solid)} D((A[1/f]\,A^+[1/f])_\solid).\n\]\nWe conjecture a similar result holds for a category of “analytically coherent $\mathcal{O}^+$ modules” denoted by $\mathcal{C}^+(X)$ on a discretely ringed adic space $X$: We prove the result when $A=A^+$ is a dvr and $f$ is a uniformizer.
URL:https://crc326gaus.de/event/oberseminar-algebra-und-geometrie-13/
LOCATION:Frankfurt\, Robert-Mayer-Str. 6-8\, Raum 309
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261030T133000
DTEND;TZID=Europe/Berlin:20261030T143000
DTSTAMP:20261023T084510Z
CREATED:20261021T121253Z
LAST-MODIFIED:20261023T084510Z
UID:14677-1793367000-1793370600@crc326gaus.de
SUMMARY:Local-global compatibility at p of automorphic Galois representations over CM fields
DESCRIPTION:Dmitri Whitmore (University of Cambridge) \nAbstract:\nThe Langlands programme predicts a correspondence between automorphic forms and Galois representations. A key expectation is local-global compatibility\, which relates this global correspondence to the local Langlands correspondence. For regular algebraic cuspidal automorphic representations over CM fields\, associated p-adic Galois representations have been constructed\, but establishing this compatibility at primes above p has remained an important open problem. \nIn this talk\, I will discuss joint work with Lambert A’Campo\, Bence Hevesi\, and Jack Thorne establishing local-global compatibility at p up to semisimplification. As a consequence\, the associated Galois representations are geometric. I will discuss applications to new cases of the adjoint Bloch–Kato Selmer vanishing conjecture and outline how we remove the hypotheses on the mod p Galois representations required by previous approaches to local-global compatibility.
URL:https://crc326gaus.de/event/tba-152/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261030T153000
DTEND;TZID=Europe/Berlin:20261030T170000
DTSTAMP:20261026T100831Z
CREATED:20260917T123745Z
LAST-MODIFIED:20261026T100831Z
UID:14130-1793374200-1793379600@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Chirantan Chowhury (TU Darmstadt): Fundamental groups of proper algebraic stacks are finitely presented \nThe question of topological finite presentation of etale fundamental groups for proper schemes over algebraically closed fields of positive characteristic\, raised by Grothendieck\, remained open until recently. It was resolved for smooth projective varieties by Esnault\, Shusterman and Srinivas. Lara\, Srinivas and Stix have extended this result to connected proper schemes. In this talk\, I present my joint work with Ludvig Modin\, in which we extend this result to algebraic stacks. In particular\, we show that for connected proper algebraic stacks with finite inertia over an algebraically closed field\, the etale fundamental group\, as introduced by Noohi\, is topologically finitely presented. \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-42/
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:20261103T200000
DTEND;TZID=Europe/Berlin:20261103T213000
DTSTAMP:20260917T132158Z
CREATED:20260917T132158Z
LAST-MODIFIED:20260917T132158Z
UID:14187-1793736000-1793741400@crc326gaus.de
SUMMARY:AI and the Future of Mathematics
DESCRIPTION:Thomas Kahle (Universität Magdeburg): You are right\, and I apologize: How AI changed one mathematician and mathematics in general \nA joint seminar of TRR 326\, TRR 358\, CRC 1442\, and Mathematics Münster\, devoted specifically to the impact of AI on mathematics.
URL:https://crc326gaus.de/event/ai-and-the-future-of-mathematics-3/
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261105T141500
DTEND;TZID=Europe/Berlin:20261105T151500
DTSTAMP:20261027T082546Z
CREATED:20260730T100735Z
LAST-MODIFIED:20261027T082546Z
UID:13887-1793888100-1793891700@crc326gaus.de
SUMMARY:AGTZ-Kolloquium
DESCRIPTION:Sebastian Wolf (Kopenhagen)
URL:https://crc326gaus.de/event/agtz-kolloquium-12/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Tamme":MAILTO:georg.tamme@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261106T153000
DTEND;TZID=Europe/Berlin:20261106T170000
DTSTAMP:20260921T072621Z
CREATED:20260917T123832Z
LAST-MODIFIED:20260921T072621Z
UID:14132-1793979000-1793984400@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Fabian Schnelle (University of Münster): tba \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-43/
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:20261112T141500
DTEND;TZID=Europe/Berlin:20261112T151500
DTSTAMP:20260730T100840Z
CREATED:20260730T100840Z
LAST-MODIFIED:20260730T100840Z
UID:13889-1794492900-1794496500@crc326gaus.de
SUMMARY:AGTZ-Kolloquium
DESCRIPTION:
URL:https://crc326gaus.de/event/agtz-kolloquium-13/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Georg Tamme":MAILTO:georg.tamme@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261112T153000
DTEND;TZID=Europe/Berlin:20261112T183000
DTSTAMP:20261022T140623Z
CREATED:20260701T124516Z
LAST-MODIFIED:20261022T140623Z
UID:13727-1794497400-1794508200@crc326gaus.de
SUMMARY:CRC-Colloquium
DESCRIPTION:15:00 Coffee\n15:30 – 16:30  Judith Ludwig (Universität Heidelberg): Eigenvarieties\n16:30 Coffee and Cake\n17:15 – 18:15  Torsten Wedhorn (TU Darmstadt): Zips\n18:30 Dinner \n 
URL:https://crc326gaus.de/event/crc-colloquium-3/
LOCATION:Frankfurt\, Hörsaalgebäude Bockenheim\, H II
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261113T153000
DTEND;TZID=Europe/Berlin:20261113T170000
DTSTAMP:20260917T123927Z
CREATED:20260917T123927Z
LAST-MODIFIED:20260917T123927Z
UID:14134-1794583800-1794589200@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:tba \nZoom (635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl)
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-44/
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
END:VCALENDAR