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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220708T153000
DTEND;TZID=Europe/Berlin:20220708T163000
DTSTAMP:20260601T061434
CREATED:20220614T115501Z
LAST-MODIFIED:20220623T074639Z
UID:3137-1657294200-1657297800@crc326gaus.de
SUMMARY:Initial degenerations of flag varieties
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (Third meeting Summer Semester 2022)\nDaniel Corey (Technische Universität Berlin) \nAbstract: We prove that the initial degenerations of the type-A flag variety admit closed immersions into finite inverse limits of flag matroid strata\, where the diagrams are derived from matroidal subdivisions of a suitable flag matroid polytope. As an application\, we prove that the initial degenerations of Fl_0(n)—the open subvariety of the complete flag variety Fl(n) consisting of flags in general position—are smooth and irreducible when n ≤ 4. We also study the Chow quotient of Fl(n) by the diagonal torus of PGL(n)\, and show that\, for n=4\, this is a log crepant resolution of its log canonical model. This is based on joint work with Jorge Alberto Olarte.
URL:https://crc326gaus.de/event/tba-7/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220708T164500
DTEND;TZID=Europe/Berlin:20220708T174500
DTSTAMP:20260601T061434
CREATED:20220614T115752Z
LAST-MODIFIED:20220623T074804Z
UID:3139-1657298700-1657302300@crc326gaus.de
SUMMARY:An analogue of Kirchhoff's theorem for the tropical Prym variety
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (Third meeting Summer Semester 2022)\nDmitry Zakharov (Central Michigan University) \nAbstract: The Jacobian of a finite graph is a finite abelian group\, and Kirchhoff’s celebrated matrix tree theorem computes the order of the Jacobian as the number of spanning trees of the graph. The Jacobian Jac(G) of a metric graph G is a real torus of dimension equal to b_1(G)\, and a weighted version of Kirchhoff’s theorem expresses the volume of Jac(G) as a weighted sum over all spanning trees of G. \nA recent paper of An\, Baker\, Kuperberg\, and Shokrieh gives a geometric interpretation of the weighted matrix-tree theorem of a metric graph G\, based on an earlier result of Mikhalkin and Zharkov. Namely\, each element of Jac(G) is represented by a unique (up to translation) so-called break divisor. The type of break divisor defines a canonical cellular decomposition of Jac(G)\, and the individual terms in the volume formula for Jac(G) are the volumes of the cells. \nI will state and prove analogous results for the tropical Prym variety Pr(G’/G) associated to a double cover of metric graphs G’->G\, as defined by Jensen\, Len\, and Ulirsch. The volume of Pr(G’/G) is calculated as a weighted sum over certain collections of spanning cycles on the target graph G\, generalizing a similar result of Zaslavsky\, Reiner and Tseng for ordinary graphs. I will then give a geometric interpretation of the volume formula in terms of a semi-canonical representability result for Prym divisors. I will discuss possible applications to the problem of resolving the Prym-Torelli map.
URL:https://crc326gaus.de/event/tba-8/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220714T140000
DTEND;TZID=Europe/Berlin:20220714T160000
DTSTAMP:20260601T061434
CREATED:20220629T091840Z
LAST-MODIFIED:20220707T064709Z
UID:3223-1657807200-1657814400@crc326gaus.de
SUMMARY:Localization theorem for algebraic stacks
DESCRIPTION:
URL:https://crc326gaus.de/event/tba-10/
LOCATION:Mainz\, Hilbertraum (05-432) and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220722T133000
DTEND;TZID=Europe/Berlin:20220722T150000
DTSTAMP:20260601T061434
CREATED:20220715T125329Z
LAST-MODIFIED:20220715T125329Z
UID:3326-1658496600-1658502000@crc326gaus.de
SUMMARY:Heights of Bloch cycles and limit mixed Hodge structures
DESCRIPTION:Prof. Robin de Jong (Universität Leiden)
URL:https://crc326gaus.de/event/heights-of-bloch-cycles-and-limit-mixed-hodge-structures/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Dr. Ana Mar%C3%ADa Botero":MAILTO:abotero@mathi.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220722T140000
DTEND;TZID=Europe/Berlin:20220722T174000
DTSTAMP:20260601T061434
CREATED:20220411T114929Z
LAST-MODIFIED:20220720T064802Z
UID:2601-1658498400-1658511600@crc326gaus.de
SUMMARY:The geometry of coherent sheaves: From derived categories to Higgs bundles
DESCRIPTION:GAUS-Workshop: “Non-Abelian Hodge theory for real Lie groups and applications” \n14:00-15:00: Oscar Garcia-Prada (Madrid)\nNon-abelian Hodge correspondence for real groups and higher Teichmüller spaces\n15:20-16:20: Florent Schaffhauser (Bogota)\nHigher Teichmüller spaces for orbifolds\n16:40-17:40: Brian Collier (Riverside)\nHolomorphic curves and cyclic G2-Higgs bundles
URL:https://crc326gaus.de/event/the-geometry-of-coherent-sheaves-from-derived-categories-to-higgs-bundles-4/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220729T140000
DTEND;TZID=Europe/Berlin:20220729T170000
DTSTAMP:20260601T061434
CREATED:20220727T082203Z
LAST-MODIFIED:20220727T082203Z
UID:3392-1659103200-1659114000@crc326gaus.de
SUMMARY:Six Functors and Descent for Solid Sheaves on Discrete Adic Spaces
DESCRIPTION:There will be a „Vorsitzung“ on Thursday (July 28) evening\nat 19:30 in Darmstadt Biergarten\n(Dieburger Strasse 97\, 64287 Darmstadt\, www.biergarten-darmstadt.com)\nEverybody is invited to join. Please write me a short e-mail\nif you are interested in joining.\nZoom\, Meeting-ID 839 7522 1432\nKenncode 053320
URL:https://crc326gaus.de/event/six-functors-and-descent-for-solid-sheaves-on-discrete-adic-spaces/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221014T133000
DTEND;TZID=Europe/Berlin:20221014T150000
DTSTAMP:20260601T061434
CREATED:20221005T125135Z
LAST-MODIFIED:20221005T125257Z
UID:3731-1665754200-1665759600@crc326gaus.de
SUMMARY:Towards local uniformization of non-archimedean surfaces
DESCRIPTION:Prof. Dr. Michael Temkin (The Hebrew University of Jerusalem)
URL:https://crc326gaus.de/event/towards-local-uniformization-of-non-archimedean-surfaces/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221020T150000
DTEND;TZID=Europe/Berlin:20221020T160000
DTSTAMP:20260601T061434
CREATED:20221003T125115Z
LAST-MODIFIED:20221004T080517Z
UID:3688-1666278000-1666281600@crc326gaus.de
SUMMARY:Characterizing every finitely generated field by a field axiom
DESCRIPTION:Oberseminar Algebra und Geometrie \nFlorian Pop (University of Pennsylvania\, Philadelphia) \nAbstract:\nRecall that the Hilbert Problem 10 (HP10) has a negative answer (by work of Davis\, Putman\, Julia Robinson\, culminating with Matijasevich). That implies at least intuitively that the arithmetic of global fields is “very complicated.” An intriguing question arising from the negative solution to HP10 is whether the arithmetic is so complicated that the isomorphism type of every global field can be “encoded” in a single field axiom\, i.e.\, whether for every global field $K$ there is a field axiom\, say $\varphi_K$\, such that for all global fields $L$ one has $L\cong K$\, provided $\varphi_K$ is true in $L$. It was shown by Rumely in 1980 that such a field axiom $\varphi_K$ does exist indeed for every global field $K$. In my talk I will explain all the terms\, and show that the above fact is true for  all finitely generated fields. This is joint work with Philip Dittmann.
URL:https://crc326gaus.de/event/tba-19/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221020T160000
DTEND;TZID=Europe/Berlin:20221020T173000
DTSTAMP:20260601T061434
CREATED:20221010T121911Z
LAST-MODIFIED:20221012T151328Z
UID:3745-1666281600-1666287000@crc326gaus.de
SUMMARY:Semi-modules and crystal bases via affine Deligne-Lusztig varieties
DESCRIPTION:Meeting-ID: 635 7328 0984Password: 100003
URL:https://crc326gaus.de/event/semi-modules-and-crystal-bases-via-affine-deligne-lusztig-varieties/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221021T133000
DTEND;TZID=Europe/Berlin:20221021T150000
DTSTAMP:20260601T061434
CREATED:20221011T122422Z
LAST-MODIFIED:20221011T122452Z
UID:3748-1666359000-1666364400@crc326gaus.de
SUMMARY:Liquid Tensor Experiment
DESCRIPTION:Dr. Johan Commelin (Universität Freiburg)
URL:https://crc326gaus.de/event/liquid-tensor-experiment/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221026T160000
DTEND;TZID=Europe/Berlin:20221026T170000
DTSTAMP:20260601T061434
CREATED:20220629T080321Z
LAST-MODIFIED:20221021T103226Z
UID:3220-1666800000-1666803600@crc326gaus.de
SUMMARY:The Gauss problem for central leaves
DESCRIPTION:Valentijn Karemaker (Universiteit Utrecht) \nAbstract: \nFor a family of finite sets whose cardinalities are naturally called class numbers\, \nthe Gauss problem asks to determine the subfamily in which every member has class number one. \nWe study the Siegel moduli space of abelian varieties in characteristic p and solve the Gauss problem \nfor the family of central leaves\, which are the loci consisting of points whose associated p-divisible groups \nare isomorphic. Our solution involves mass formulae\, computations of automorphism groups\, \nand a careful analysis of Ekedahl-Oort strata in genus 4. This geometric Gauss problem is \nclosely related to an arithmetic Gauss problem for genera of positive-definite quaternion Hermitian lattices\, \nwhich we also solve.\nOberseminar Algebra und Geometrie (Frankfurt)
URL:https://crc326gaus.de/event/tba-9/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221028T133000
DTEND;TZID=Europe/Berlin:20221028T150000
DTSTAMP:20260601T061434
CREATED:20221021T125518Z
LAST-MODIFIED:20221027T201338Z
UID:3884-1666963800-1666969200@crc326gaus.de
SUMMARY:On a Conjecture of Colliot-Thélène
DESCRIPTION:Florian Pop (University of Pensylvania) \nlive stream:\nhttp://129.206.106.240/UzPL29kB/mathematikon-seminarraum.html
URL:https://crc326gaus.de/event/on-a-conjecture-of-colliot-thelene/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221101T160000
DTEND;TZID=Europe/Berlin:20221101T170000
DTSTAMP:20260601T061434
CREATED:20220629T075903Z
LAST-MODIFIED:20221023T100731Z
UID:3217-1667318400-1667322000@crc326gaus.de
SUMMARY:"Classifying" fake projective planes
DESCRIPTION:Matthew Stover (Temple University) \nAbstract: \n A fake projective plane is a smooth complex projective surface with the same \ncomplex cohomology as the projective plane. I will describe several more refined \n"classifications"\, starting with the very vague "they are ball quotients"\, describing \na shorter proof (with shortcut via work of Esnault-Groechenig) of Klingler's theorem \nthat the associated lattice in PU(2\,1) is arithmetic\, and ending with my recent proof \nthat there are exactly 46 up to the action of Aut(C) (equivalently\, isomorphism of \nétale fundamental group). \nOberseminar Algebra und Geometrie \nZoom\nmeeting-ID: 635 5834 1373\npassword: the number of fake projective planes up to biholomorphism (read wikipedia carefully)
URL:https://crc326gaus.de/event/tba-5/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221101T160000
DTEND;TZID=Europe/Berlin:20221101T170000
DTSTAMP:20260601T061434
CREATED:20221108T125412Z
LAST-MODIFIED:20221108T125412Z
UID:4190-1667318400-1667322000@crc326gaus.de
SUMMARY:International Seminar on Automorphic Forms: The invariants of the Weil representation of SL_2(Z)
DESCRIPTION:The transformation behaviour of the vector valued theta function of a positive definite even lattice under the metaplectic group Mp_2(Z) is described by the Weil representation. This representation plays an important role in the theory of automorphic forms. We show that its invariants are induced from 5 fundamental invariants. \nYou can join the Zoom meeting at https://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/international-seminar-on-automorphic-forms-the-invariants-of-the-weil-representation-of-sl_2z/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221103T140000
DTEND;TZID=Europe/Berlin:20221103T160000
DTSTAMP:20260601T061434
CREATED:20221102T095632Z
LAST-MODIFIED:20221102T095632Z
UID:4138-1667484000-1667491200@crc326gaus.de
SUMMARY:Motivation for q-deformation
DESCRIPTION:
URL:https://crc326gaus.de/event/motivation-for-q-deformation/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221104T133000
DTEND;TZID=Europe/Berlin:20221104T150000
DTSTAMP:20260601T061434
CREATED:20221025T120821Z
LAST-MODIFIED:20221027T203836Z
UID:3926-1667568600-1667574000@crc326gaus.de
SUMMARY:Non-abelian Chabauty for the thrice-punctured line and the Selmer section conjecture
DESCRIPTION:Martin Lüdtke (Reichsuniversität Groningen) \nFor a smooth projective hyperbolic curve over a number field K the set of rational points X(K) is finite by Faltings’ Theorem. Grothendieck’s section conjecture predicts that this set can be described via Galois sections of the étale fundamental group of X. On the other hand\, the non-abelian Chabauty method produces p-adic analytic functions which conjecturally cut out X(K) as a subset of X(Qp). We relate the two conjectures and discuss the example of the thrice-punctured line\, where non-abelian Chabauty is used to prove a local-to-glocal principle for the section conjecture. \nlivestream:\nhttp://129.206.106.240/UzPL29kB/mathematikon-seminarraum.html
URL:https://crc326gaus.de/event/non-abelian-chabauty-for-the-thrice-punctured-line-and-the-selmer-section-conjecture/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Marius Leonhardt":MAILTO:mleonhardt@mathi.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221104T153000
DTEND;TZID=Europe/Berlin:20221104T171000
DTSTAMP:20260601T061434
CREATED:20221103T150111Z
LAST-MODIFIED:20221103T222440Z
UID:4148-1667575800-1667581800@crc326gaus.de
SUMMARY:Canonical integral models for Shimura varieties defined by tori
DESCRIPTION:Patrick Daniels (University of Michigan) \nPappas and Rapoport have recently shown that a p-adic integral model for Shimura variety  with parahoric level structure is characterized by the existence of a universal shtuka\, and they conjecture the existence of such a canonical integral model in general. We will illustrate the conjecture in the case of a Shimura variety defined by a torus\, where (surprisingly)\, the theory is already nontrivial. We will also explain how prismatic F-crystals arise naturally when constructing the universal shtuka in the torus case. \nMeeting-ID: 635 7328 0984\nPassword: smallest six digit prime
URL:https://crc326gaus.de/event/canonical-integral-models-for-shimura-varieties-defined-by-tori/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221108T150000
DTEND;TZID=Europe/Berlin:20221108T160000
DTSTAMP:20260601T061434
CREATED:20221108T125751Z
LAST-MODIFIED:20251023T125956Z
UID:4194-1667919600-1667923200@crc326gaus.de
SUMMARY:International Seminar on Automorphic Forms
DESCRIPTION:Nina Zubrilina (Princeton University): Convergence to Plancherel measure of Hecke eigenvalues.  \nThis talk is postponed to next semester.
URL:https://crc326gaus.de/event/international-seminar-on-automorphic-forms-convergence-to-plancherel-measure-of-hecke-eigenvalues/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221111T133000
DTEND;TZID=Europe/Berlin:20221111T150000
DTSTAMP:20260601T061434
CREATED:20221028T162826Z
LAST-MODIFIED:20221109T114328Z
UID:3988-1668173400-1668178800@crc326gaus.de
SUMMARY:Integral p-adic cohomology for open and singular varieties
DESCRIPTION:Veronika Ertl (Universität Regensburg) \nIn this talk I will explain a joint result with Johannes Sprang and Atsushi Shiho. Under certain conditions of resolutions of singularities in positive characteristic\, we construct a “good” integral p-adic cohomology theory for open and singular varieties\, by using a version of Voevodsky’s h-topology. I will explain the construction and clarify in which sense our cohomology is a “good” p-adic cohomology theory. I will also touch on the question why a similar approach does not work in full generality without resolutions of singularities. \nlivestream:\nhttp://129.206.106.240/UzPL29kB/mathematikon-seminarraum.html
URL:https://crc326gaus.de/event/integral-p-adic-cohomology-for-open-and-singular-varieties/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221111T133000
DTEND;TZID=Europe/Berlin:20221111T150000
DTSTAMP:20260601T061434
CREATED:20221110T123239Z
LAST-MODIFIED:20221115T105756Z
UID:4265-1668173400-1668178800@crc326gaus.de
SUMMARY:Analytische Kohomologie von Lubin – ­­Tate (φ\, Γ)-Moduln"
DESCRIPTION:Rustam Steingart (Heidelberg University)
URL:https://crc326gaus.de/event/analytische-kohomologie-von-lubin-tate-%cf%86-%ce%b3-moduln/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221111T153000
DTEND;TZID=Europe/Berlin:20221111T170000
DTSTAMP:20260601T061434
CREATED:20221109T082715Z
LAST-MODIFIED:20221110T134138Z
UID:4235-1668180600-1668186000@crc326gaus.de
SUMMARY:On the Drinfeld's Lemma for the pro-étale fundamental group
DESCRIPTION:Seminar on Arithmetic Geometry: \nMarcin Lara (Goethe University) \nDrinfeld’s Lemma for the étale fundamental group serves as a replacement for the Künneth formula in positive characteristic\, that holds even when neither of the varieties is proper. I will report on the progress towards extending this result to the pro-étale fundamental group of Bhatt-Scholze. Note: this is still quite an early stage of the project.
URL:https://crc326gaus.de/event/on-the-drinfelds-lemma-for-the-pro-etale-fundamental-group/
LOCATION:Darmstadt\, Room S215 401
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221115T160000
DTEND;TZID=Europe/Berlin:20221115T170000
DTSTAMP:20260601T061434
CREATED:20221108T130002Z
LAST-MODIFIED:20221110T130102Z
UID:4196-1668528000-1668531600@crc326gaus.de
SUMMARY:Modularity and automorphy of cycles on Shimura varieties
DESCRIPTION:Congling Qiu (Yale University):  \nAlgebraic cycles are central objects in algebraic/arithmetic geometry and problems around them are very difficult. For Shimura varieties modularity of generating series with coefficients being algebraic cycles has been proved useful in the of study of algebraic cycles. A closely related problem is the automorphy of representations spanned by algebraic cycles. I will discuss the history of these problems some progress and applications. \nInternational Seminar on Automorphic Forms \nYou can join the Zoom meeting at \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/international-seminar-on-automorphic-forms-tba/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221117T140000
DTEND;TZID=Europe/Berlin:20221117T160000
DTSTAMP:20260601T061434
CREATED:20221024T125203Z
LAST-MODIFIED:20221107T125619Z
UID:3915-1668693600-1668700800@crc326gaus.de
SUMMARY:Algebraicity of Higher Green Functions at a CM Point
DESCRIPTION:Yingkun Li (Darmstadt/Mainz) \nAbstract: By the classical theory of complex multiplication\, the modular j-function takes algebraic values at CM points. It is an interesting question to ask about the algebraic nature of other types of automorphic functions at CM points. For the automorphic Green function at integral parameters\, Gross and Zagier conjectured in the 1980s that their valuesat a CM point is essentially the logarithm of an algebraic number. In this talk\, we will discuss recent progress toward this conjecture. This is partly joint with Jan Bruinier and Tonghai Yang.
URL:https://crc326gaus.de/event/tba-25/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221118T133000
DTEND;TZID=Europe/Berlin:20221118T150000
DTSTAMP:20260601T061434
CREATED:20221109T154454Z
LAST-MODIFIED:20221111T135920Z
UID:4258-1668778200-1668783600@crc326gaus.de
SUMMARY:A survey of Galois deformation theory
DESCRIPTION:Ravi Ramakrishna (Cornell University)
URL:https://crc326gaus.de/event/tba-28/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221122T160000
DTEND;TZID=Europe/Berlin:20221122T170000
DTSTAMP:20260601T061434
CREATED:20221108T130142Z
LAST-MODIFIED:20221117T085724Z
UID:4198-1669132800-1669136400@crc326gaus.de
SUMMARY:Orthogonal modular forms\, Siegel modular forms and Eisenstein congruences
DESCRIPTION:International Seminar on Automorphic Forms \nThe theta correspondence between the orthogonal group and the symplectic group  provides a cornerstone for studying Siegel modular forms via orthogonal modular forms. In this work\, we make this correspondence completely explicit\, with precise level structure for low to moderate even rank and nontrivial discriminant. Guided by computational discoveries\, we prove congruences between eigenvalues of classical modular forms and eigenvalues of genuine Siegel modular forms\, obtain formulas for the number of neighbors in terms of eigenvalues of classical modular forms\, and formulate some conjectures that arise naturally from the data. This is joint work with Dan Fretwell\, Colin Ingalls\, Adam Logan\, Spencer Secord\, and John Voight \nEran Assaf (Dartmouth College) \nYou can join the Zoom meeting at https://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/international-seminar-on-automorphic-forms-tba-2/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221123T160000
DTEND;TZID=Europe/Berlin:20221123T170000
DTSTAMP:20260601T061434
CREATED:20221018T084859Z
LAST-MODIFIED:20221115T114508Z
UID:3856-1669219200-1669222800@crc326gaus.de
SUMMARY:P=W phenomena on singular moduli spaces
DESCRIPTION:Oberseminar Algebra und Geometrie \nCamilla Felisetti (University of Modena) \nAbstract:\nIrreducible holomorphic symplectic (IHS) varieties can be thought as a generalization of hyperkähler manifolds allowing singularities.\nAmong them we can find for example moduli spaces of sheaves on K3 and abelian surfaces\, which have been recently shown to play a crucial role in non abelian Hodge theory.\nAfter recalling the main features of IHS varieties\, I will present several results concerning their intersection cohomology and the perverse filtration associated with a Lagrangian fibration\, establishing a compact analogue of the celebrated P=W conjecture by de Cataldo\, Hausel and Migliorini for varieties which admit a symplectic resolution.\nThe talk is based on joint works with Mirko Mauri\, Junliang Shen and Qizheng Yin.
URL:https://crc326gaus.de/event/tba-24/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221124T140000
DTEND;TZID=Europe/Berlin:20221124T160000
DTSTAMP:20260601T061434
CREATED:20221024T125436Z
LAST-MODIFIED:20221123T101800Z
UID:3917-1669298400-1669305600@crc326gaus.de
SUMMARY:Limit periods on curves and arithmetic heights
DESCRIPTION:Emre Sertöz (Hannover) \nWe show that in a nodal degeneration of smooth curves\, the periods of the resulting limit mixed Hodge structure (LMHS) contain arithmetic information. For instance\, if the nodal fiber is identified with a smooth curve C glued at two points p and q then the LMHS relates to the Neron–Tate height of p-q in the Jacobian of C. This observation combines an idea resembling “arithmetic deformation to the normal cone” with a study of the divergence behavior of the periods of a degenerating family of curves. Joint work with Robin de Jong and Spencer Bloch.
URL:https://crc326gaus.de/event/tba-26/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221125T133000
DTEND;TZID=Europe/Berlin:20221125T150000
DTSTAMP:20260601T061434
CREATED:20221116T095132Z
LAST-MODIFIED:20221116T095132Z
UID:4330-1669383000-1669388400@crc326gaus.de
SUMMARY:Homotopy Theory in Condensed Mathematics
DESCRIPTION:Catrin Mair (TU Darmstadt)
URL:https://crc326gaus.de/event/homotopy-theory-in-condensed-mathematics/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221125T140000
DTEND;TZID=Europe/Berlin:20221125T150000
DTSTAMP:20260601T061434
CREATED:20221012T125125Z
LAST-MODIFIED:20221115T113641Z
UID:3777-1669384800-1669388400@crc326gaus.de
SUMMARY:Quadratically enriched tropical intersections 1
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (First meeting Winter Semester 2022/23) \nSabrina Pauli (Universität Duisburg-Essen) \nAbstract:\nTropical geometry has been proven to be a powerful computational tool in enumerative geometry over the complex and real numbers. Results from motivic homotopy theory allow to study questions in enumerative geometry over an arbitrary field k. In these two talks we present one of the first examples of how to use tropical geometry for questions in enuemrative geometry over k\, namely a proof of the quadratically enriched Bézout’s theorem for tropical curves. \nIn the first talk we explain what we mean by the “quadratic enrichment”\, that is we define the necessary notions of enumerative geometry over arbitrary fields valued in the Grothendieck-Witt ring of quadratic forms over k.
URL:https://crc326gaus.de/event/tba-23/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221125T140000
DTEND;TZID=Europe/Berlin:20221125T153000
DTSTAMP:20260601T061434
CREATED:20221116T133236Z
LAST-MODIFIED:20221117T203545Z
UID:4333-1669384800-1669390200@crc326gaus.de
SUMMARY:Isotropic motivic homotopy theory
DESCRIPTION:Seminar on Arithmetic Geometry \nIn this talk I will introduce isotropic motivic homotopy theory\, which is a localization of the usual motivic homotopy theory obtained\, roughly speaking\, by “killing” anisotropic varieties. First\, I will present the triangulated category of isotropic motives\, constructed by Vishik\, as well as its stable homotopic counterpart. Then\, I will discuss the structure of the category of isotropic cellular spectra\, which are deeply related to comodules over the classical dual Steenrod algebra. \nZoom (Meeting-ID: 635 7328 0984\, Password: smallest six digit prime) \nFabio Tanania\, LMU München
URL:https://crc326gaus.de/event/isotropic-motivic-homotopy-theory/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
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END:VCALENDAR