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X-WR-CALDESC:Events for CRC 326 - GAUS
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230210T153000
DTEND;TZID=Europe/Berlin:20230210T170000
DTSTAMP:20260404T162941
CREATED:20230130T121955Z
LAST-MODIFIED:20230130T121955Z
UID:4814-1676043000-1676048400@crc326gaus.de
SUMMARY:Revisiting derived crystalline cohomology
DESCRIPTION:Seminar Arithmetic Geometry \nZhouhang Mao (Paris) \nProjectively generated ∞-categories and left derived functors turn out to be important in derived geometry. In this talk\, we will present the result of the ∞-category of surjections  of animated rings being projectively generated\, the notion of animated PD-pairs —  surjections of animated rings with a “derived” PD-structure\, and how to use these tools to study the crystalline and prismatic cohomology. In particular\, we will deduce various comparison theorems without finiteness conditions. \nZoom (Meeting-ID: 635 7328 0984\, Password: smallest six digit prime)
URL:https://crc326gaus.de/event/revisiting-derived-crystalline-cohomology/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230209T163000
DTEND;TZID=Europe/Berlin:20230209T173000
DTSTAMP:20260404T162941
CREATED:20230207T113337Z
LAST-MODIFIED:20230207T113412Z
UID:4860-1675960200-1675963800@crc326gaus.de
SUMMARY:„MATH+ as a Research Object"
DESCRIPTION:Frauen sind in der Mathematik weiterhin unterrepräsentiert. Trotz in den letzten Jahren steigender Frauenanteile zu Beginn des Studiums\, nimmt der Anteil an Wissenschaftlerinnen bis hin zur Professur noch immer kontinuierlich ab. Das Bild der sogenannten Leaky Pipeline besitzt somit weiterhin Gültigkeit. \nDas soziologische Forschungsprojekt „MATH+ as a Research Object“\, wurde durch den mathematischen Exzellenzcluster MATH+ in Berlin initiiert. Ziel des Projekts ist es\, die Reproduktionsmechanismen für möglicherweise bestehende Geschlechterdisparitäten im Exzellenzcluster aufzuzeigen und wissenschaftlich basierte Hinweise für die Überwindung dieser Disparitäten in der Mathematik im Allgemeinen und im Cluster im Speziellen zu generieren. \nDie zentralen Fragen der Studie lauten: \nZeigen sich in der Rekrutierung und Unterstützung\, in der Gestaltung sozialer Beziehungen oder in den Arbeitsstrukturen im Cluster Geschlechterdisparitäten?\nWie sind diese Disparitäten verfasst und wie kann man ihnen entgegenwirken?\nWelche impliziten Geschlechterungleichheit fördernden Muster wirken in der Disziplin Mathematik selbst?\nWelche Faktoren entscheiden darüber\, ob (insbesondere weibliche) Wissenschaftler*innen in der Wissenschaft bleiben oder sie verlassen? \nIn dem Vortrag wird Dr. Anna-Christin Ransiek aus der Arbeitsgruppe „Gender Studies in der Mathematik“ der Freien Universität Berlin das Projekt und erste Befunde der Studie vorstellen. \n\nVor dem Vortrag gibt es ab 16 Uhr eine Kaffeepause in S2|15-244
URL:https://crc326gaus.de/event/math-as-a-research-object/
LOCATION:Darmstadt\, Room 244 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289
CATEGORIES:GAUS-Event
ORGANIZER;CN="Catrin Mair":MAILTO:catrin.mairqtu-darmstadt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230209T140000
DTEND;TZID=Europe/Berlin:20230209T153000
DTSTAMP:20260404T162941
CREATED:20220929T120649Z
LAST-MODIFIED:20230201T121210Z
UID:3650-1675951200-1675956600@crc326gaus.de
SUMMARY:Buildings
DESCRIPTION:Timo Richarz (TU Darmstadt): Algebraic loop groups and their flag varieties \nAbstract: Loop groups and their associated flag varieties naturally occur in geometric approaches to the Langlands program. Prominent examples include so-called affine Grassmannians. In this talk I give an introduction to the topic focussing on algebro-geometric aspects and relations with Bruhat-Tits theory.
URL:https://crc326gaus.de/event/tba-18/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230207T160000
DTEND;TZID=Europe/Berlin:20230207T170000
DTSTAMP:20260404T162941
CREATED:20221108T132317Z
LAST-MODIFIED:20230130T121438Z
UID:4216-1675785600-1675789200@crc326gaus.de
SUMMARY:Asymptotic equidistribution for partition statistics and topological invariants
DESCRIPTION:International Seminar on Automorphic Forms \nThroughout mathematics\, the equidistribution properties of certain objects are a central  theme studied by many authors. In my talk I am going to speak about a joint project with William Craig and Joshua Males\, where we provide a general framework for proving asymptotic equidistribution\, convexity\, and log-concavity of coefficients of generating functions on arithmetic progressions. \nGiulia Cesana (University of Cologne) \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-11/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230207T140000
DTEND;TZID=Europe/Berlin:20230207T170000
DTSTAMP:20260404T162941
CREATED:20221026T124619Z
LAST-MODIFIED:20230124T084832Z
UID:3943-1675778400-1675789200@crc326gaus.de
SUMMARY:Moduli of Langlands parameters
DESCRIPTION:Jean-François Dat (Sorbonne Université\, Paris): Finiteness of Hecke algebras \nTalk 13 (14:00-15:30): Finiteness of Hecke algebras\nThe first goal of the talk is to give an introduction to Fargues-Scholze’s theory of local excursion algebras. Along with previous results covered in the seminar\, these will then be used to deduce finiteness results for Hecke algebras of p-adic groups. \nTalk 14 (16:00-17:00): Second adjointness\nThe goal of this talk is to deduce and explain certain consequences of\nthe finiteness results from the previous talk\, including second\nadjointness. \nZoom: Meeting-ID: 61220727363 \nPassword: largest six digit prime
URL:https://crc326gaus.de/event/moduli-of-langlands-parameters-finiteness-of-hecke-algebras/
LOCATION:Zoom
CATEGORIES:GAUS-AG
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230207T111500
DTEND;TZID=Europe/Berlin:20230207T124500
DTSTAMP:20260404T162941
CREATED:20230125T144952Z
LAST-MODIFIED:20230125T144952Z
UID:4801-1675768500-1675773900@crc326gaus.de
SUMMARY:K-theory of the integers and the Kummer-Vandiver conjecture
DESCRIPTION:Lorenzo Mantovani: Suspended Tits buildings\nGeorg Tamme: K4(Z) is the trivial group \nTalk 9: Suspended Tits buildings (07.02. Lorenzo Mantovani)\nThis talk covers the results of [Rog00\, §5\, §6]. Explain the explicit identifications of the poset rank filtration and its subquotients for stable apartments [Prop. 5.1\, Prop. 5.4]. Introduce Tits buildings and explain the relation between the Tits buildings of a PID and its fraction field [Lem. 6.1]. Maybe arrange with the subsequent talk’s speaker to cover some material from [§7] in order to alleviate their job.\nTalk 10: K4(Z) is the trivial group (07.02. Georg Tamme)\nThis talks covers the results of [Rog00\, §7\, §8]. Introduce the component filtration of stable\nbuldings [Def. 7.1] and explain (as much as time permits) the associated spectral sequence\nE1 s\,t = Ht(GLk(R); Zs) ⇒ Hs+t( ̄Fk K(R)). Finally\, explain what we can conclude about the rank filtration spectral sequence for K(Z) modulo the Serre subcategory of finite 2-groups [(8.4)]. Compute the low degrees of the spectrum homology H∗(K(Z)) of the spectrum K(Z) [Thm. 8.5] and subsequently the vanishing of K4(Z) [Thm. 8.6].
URL:https://crc326gaus.de/event/k-theory-of-the-integers-and-the-kummer-vandiver-conjecture-10/
LOCATION:Heidelberg\, Mathematikon\, SR 8 und Zoom\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230206T150000
DTEND;TZID=Europe/Berlin:20230206T173000
DTSTAMP:20260404T162941
CREATED:20230131T145759Z
LAST-MODIFIED:20230201T124708Z
UID:4821-1675695600-1675704600@crc326gaus.de
SUMMARY:The geometry of coherent sheaves: From derived categories to Higgs bundles
DESCRIPTION:GAUS-Workshop: “Invariants and curve counting” \n15:00-16:00: Luca Battistella (Frankfurt):\nLogarithmic and orbifold Gromov-Witten invariants\nAbstract: Logarithmic Gromov-Witten theory can be thought of as the study of curves in open manifolds\, or\, in other words\, curves with tangency conditions to a boundary divisor. When the divisor is smooth\, several techniques have been developed to compute the invariants\, most notably orbifold stable maps. When the divisor is normal crossings\, on the other hand\, the logarithmic theory remains hardly accessible. The strategy of rank reduction\, i.e. looking at the components of the boundary one at a time\, is more directly applicable to other theories than the logarithmic one (as shown in Nabijou-Ranganathan and B.-Nabijou-Tseng-You) due to tropical obstructions. Inspired by one of the distinguishing features of the logarithmic theory – namely\, birational invariance [Abramovich-Wise] – in joint work with Nabijou and Ranganathan we show that\, when the genus is zero\, tropical obstructions can be disposed of by blowing up the target sufficiently. The slogan is that the logarithmic theory is the limit orbifold theory under birational modifications along the boundary divisor. If time permits I will discuss work in progress towards understanding negative contact. \n16:20-17:20: Georg Oberdieck (Stockholm):\nPandharipande-Thomas theory of elliptic threefolds and Jacobi forms\nAbstract: Pandharipande-Thomas theory is the study of the intersection theory of the moduli space of stable pairs of a threefold. The intersection numbers\, called Pandharipande-Thomas invariants\, may be viewed as counting curves on the threefold subject to given incidence conditions. In this talk we explore the properties of the generating series of Pandharipande-Thomas invariants of elliptically fibered threefolds. There will be two main conjectures: Quasi-Jacobi Property and Holomorphic Anomaly Equations. Together these essentially determine the modular properties of the generating series. The conjectures are motivated by the case of Calabi-Yau threefolds where by mirror symmetry computations Huang-Katz-Klemm conjectured that the series of PT invariants are Jacobi forms. I discuss several examples\, in particular the equivariant geometry of K3xA^1. Here the conjectures lead to explicit new formulas for the invariants. Based on joint work with Maximilian Schimpf.
URL:https://crc326gaus.de/event/invariants-and-curve-counting/
LOCATION:Frankfurt\, Hilbertraum\, Rober-Mayer-Str. 6-8\, Raum 302
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230203T164500
DTEND;TZID=Europe/Berlin:20230203T174500
DTSTAMP:20260404T162941
CREATED:20221205T121408Z
LAST-MODIFIED:20230124T140817Z
UID:4503-1675442700-1675446300@crc326gaus.de
SUMMARY:Universality for tropical maps
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (Second meeting Winter Semester 2022/23) \nNavid Nabijou (University of Cambridge) \nAbstract: I will discuss recent work concerning maps from tropical curves to orthants. A “combinatorial type” of such map is the data of an abstract graph together with slope vectors along the edges. To each such combinatorial type there is an associated moduli space\, which parametrises metric enhancements of the graph compatible with the given slopes. This moduli space is a rational polyhedral cone\, giving rise to an affine toric variety.\nOur main result shows that every rational polyhedral cone appears as the moduli space associated to some combinatorial type of tropical map. This establishes universality (also known as Murphy’s law) for tropical maps. The proof is constructive and extremely concrete\, as I will demonstrate. Combined with insights from logarithmic geometry\, our result implies that every toric singularity appears as a virtual singularity on a moduli space of stable logarithmic maps. \n\n\nThis is joint work with Gabriel Corrigan and Dan Simms.
URL:https://crc326gaus.de/event/tba-34/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230203T153000
DTEND;TZID=Europe/Berlin:20230203T163000
DTSTAMP:20260404T162941
CREATED:20221205T120951Z
LAST-MODIFIED:20230125T132340Z
UID:4496-1675438200-1675441800@crc326gaus.de
SUMMARY:Polyhedral models for K-theory
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (Second meeting Winter Semester 2022/23) \nLeonid Monin (Universität Leipzig) \nAbstract: One can associate a commutative\, graded algebra which satisfies Poincare duality to a homogeneous polynomial f on a vector space V. One particularly interesting example of this construction is when f is the volume polynomial on a suitable space of (virtual) polytopes. In this case the algebra A_f recovers cohomology rings of toric or flag varieties. \nIn my talk I will explain these results and present their recent generalizations. In particular\, I will explain how to associate an algebra with Gorenstein duality to any function g on a lattice L. In the case when g is the Ehrhart function on a lattice of integer (virtual) polytopes\, this construction recovers K-theory of toric and full flag varieties.
URL:https://crc326gaus.de/event/tba-33/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230203T140000
DTEND;TZID=Europe/Berlin:20230203T150000
DTSTAMP:20260404T162941
CREATED:20221205T120737Z
LAST-MODIFIED:20230123T134644Z
UID:4484-1675432800-1675436400@crc326gaus.de
SUMMARY:Linear degenerate tropical flag matroids
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (Second meeting Winter Semester 2022/23) \nVictoria Schleis (Universität Tübingen) \nAbstract: Grassmannians and flag varieties are important moduli spaces in algebraic geometry. Their linear degenerations arise in representation theory as they describe quiver representations and their irreducible modules. As linear degenerations of flag varieties are difficult to analyze algebraically\, we describe them in a combinatorial setting and further investigate their tropical counterparts. \nIn this talk\, I will introduce matroidal\, polyhedral and tropical analoga and descriptions of linear degenerate flags and their varieties obtained in joint work with Alessio Borzì. To this end\, we introduce and study morphisms of valuated matroids. Using techniques from matroid theory\, polyhedral geometry and linear tropical geometry\, we use the correspondences between the different descriptions to gain insight on the structure of linear degeneration. Further\, we analyze the structure of linear degenerate flag varieties in all three settings\, and provide some cover relations on the poset of degenerations. For small examples\, we relate the observations on cover relations to the flat irreducible locus studied in representation theory.
URL:https://crc326gaus.de/event/tba-32/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230203T133000
DTEND;TZID=Europe/Berlin:20230203T150000
DTSTAMP:20260404T162941
CREATED:20221214T130418Z
LAST-MODIFIED:20221214T130418Z
UID:4629-1675431000-1675436400@crc326gaus.de
SUMMARY:Integrality of smoothed p-adic Artin L-functions
DESCRIPTION:Bence Forrás (Universität Duisburg-Essen) \nAbstract: We introduce a smoothed version of the equivariant S-truncated p-adic Artin L-function for one-dimensional admissible p-adic Lie extensions of number fields. Integrality of this smoothed p-adic L-function\, conjectured by Greenberg\, has been verified for pro-p extensions (assuming the Equivariant Iwasawa Main Conjecture) as well as p-abelian extensions (unconditionally). Integrality in the general case is also expected to hold\, and is the subject of ongoing research.
URL:https://crc326gaus.de/event/integrality-of-smoothed-p-adic-artin-l-functions/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230202T140000
DTEND;TZID=Europe/Berlin:20230202T160000
DTSTAMP:20260404T162941
CREATED:20221116T085643Z
LAST-MODIFIED:20230116T081424Z
UID:4326-1675346400-1675353600@crc326gaus.de
SUMMARY:Toroidal b-divisors and applications in differential and arithmetic geometry
DESCRIPTION:Ana Botero (Regensburg) \nWe define toroidal b-divisors on a quasi projective variety over a field. These can be seen as conical functions on a balanced polyhedral space. We show the existence of an intersection pairing for so called nef toroidal b-divisors\, which gives rise to a Monge-Ampére type measure on the polyhedral space. Moreover\, using the theory of Okounkov bodies\, we show that a Hilbert-Samuel type formula holds in this setting. We then show some applications of this theory. First\, we show some Chern-Weil type formulae for singular semi-positive metrics on line bundles. Then\, using the Hilbert-Samuel formula\, we compute asymptotic dimension formulae of spaces of automorphic forms on mixed Shimura varieties.
URL:https://crc326gaus.de/event/tba-30/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230131T160000
DTEND;TZID=Europe/Berlin:20230131T170000
DTSTAMP:20260404T162941
CREATED:20221108T132141Z
LAST-MODIFIED:20230124T083330Z
UID:4214-1675180800-1675184400@crc326gaus.de
SUMMARY:Continuity and value distribution of quantum modular forms
DESCRIPTION:International Seminar on Automorphic Forms \nSandro Bettin (University of Genova) \nQuantum modular forms are functions f defined on the rationals whose period functions\, such as ψ(x):= f(x) – x-k f(-1/x) (for level 1)\, satisfy some continuity properties. In the case of k=0\, f can be interpreted as a Birkhoff sums associated with the Gauss map. In particular\, under mild hypotheses on G\, one can show convergence to a stable law. If k is non-zero\, the situation is rather different and we can show that mild conditions on psi imply that f itself has to exhibit some continuity property. Finally\, we discuss the convergence in distribution also in this case. This is a joint work with Sary Drappeau. \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-10/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230131T140000
DTEND;TZID=Europe/Berlin:20230131T153000
DTSTAMP:20260404T162941
CREATED:20220929T120115Z
LAST-MODIFIED:20230109T085525Z
UID:3644-1675173600-1675179000@crc326gaus.de
SUMMARY:Buildings
DESCRIPTION:Johannes Horn (Goethe University): Langton’s theorem \nYou can join the Zoom meeting at \nhttps://uni-frankfurt.zoom.us/j/62173091959?pwd=eVFsaE5ndm1hVGdXQk5XTHZKWHBRZz09
URL:https://crc326gaus.de/event/tba-15/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 110 und Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230131T111500
DTEND;TZID=Europe/Berlin:20230131T124500
DTSTAMP:20260404T162941
CREATED:20221214T131530Z
LAST-MODIFIED:20230125T125920Z
UID:4637-1675163700-1675169100@crc326gaus.de
SUMMARY:K-theory of the integers and the Kummer-Vandiver conjecture
DESCRIPTION:Christian Dahlhausen: The spectrum level rank filration \nThis talk covers the results [Rog00\, §1–§4] whose proofs rely on [Rog92\, §1–9]. First recall some relevant notions from topology which are needed. Introduce the rank filtration F• K(R) on the algebraic K-theory spectrum K(R) of a ring R and relate its subquotients ̄F• K(R) with the relative smash product of the universal bundle EGL•(R) with the stable building D(R•) over GL•(R) R [Prop. 2.2]. In order to understand better the second component D(R•) introduce the poset filtration on it [Def. 3.1] and then relate the subquotients of this filtration with the relative smash product of GL•(R)/Pω with the subquotients on the poset filtration on stable apartments [Prop. 4.2] which will be analysed in the subsequent talk.
URL:https://crc326gaus.de/event/k-theory-of-the-integers-and-the-kummer-vandiver-conjecture-9/
LOCATION:Heidelberg\, Mathematikon\, SR 8 und Zoom\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230127T153000
DTEND;TZID=Europe/Berlin:20230127T170000
DTSTAMP:20260404T162941
CREATED:20230124T110110Z
LAST-MODIFIED:20230124T114322Z
UID:4781-1674833400-1674838800@crc326gaus.de
SUMMARY:Motives of moduli of bundles on curves
DESCRIPTION:Seminar Arithmetic Geometry \nSimon Pepin Lehalleur (Radboud-Universiteit Nijmegen) \nAbstract: (Joint with Victoria Hoskins\, Nijmegen) Moduli spaces and stacks of bundles on smooth projective curves are basic objects of algebraic geometry and part of the geometric set-up of the Langlands program for function fields. Their cohomology is well understood in some ways and still very mysterious in others. After some recollections on Voevodsky\nmotives\, I will present several results about the motives of the moduli stack of vector bundles and the moduli spaces of semistable Higgs bundles\, expressing them in terms of the motives of powers of the base curve. I will then explain how this can combined with constructions of Maulik-Shen to prove a motivic version of the “topological mirror symmetry” connecting moduli spaces of SL_n and PGL_n-Higgs bundles. \nZoom (Meeting-ID: 635 7328 0984\, Password: smallest six digit prime) \n 
URL:https://crc326gaus.de/event/motives-of-moduli-of-bundles-on-curves/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230127T133000
DTEND;TZID=Europe/Berlin:20230127T150000
DTSTAMP:20260404T162941
CREATED:20230118T155149Z
LAST-MODIFIED:20230124T142517Z
UID:4758-1674826200-1674831600@crc326gaus.de
SUMMARY:Automorphisms of categories of schemes
DESCRIPTION:Remy van Dobben de Bruyn (Universität Utrecht) \nAbstract: Given two schemes S and S’\, we show that any equivalence between Sch/S and Sch/S’ comes from a unique isomorphism between S and S’. In particular\, the category of schemes does not have any nontrivial automorphisms. This eliminates all Noetherian and finite type hypotheses from a result of Mochizuki\, and answers a series of questions of Brandenburg. The methods are analogous to those in anabelian geometry (but easier)\, and this talk also serves as an introduction to those ideas for non-experts. \n 
URL:https://crc326gaus.de/event/automorphisms-of-categories-of-schemes/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Christian Dahlhausen":MAILTO:cdahlhausen@mathi.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230126T151500
DTEND;TZID=Europe/Berlin:20230126T174500
DTSTAMP:20260404T162941
CREATED:20221004T125839Z
LAST-MODIFIED:20230116T130839Z
UID:3713-1674746100-1674755100@crc326gaus.de
SUMMARY:Non-hypergeometric E-functions
DESCRIPTION:15:15-16:15:  Mingkuan Zhang (TU Darmstadt): A non-hypergeometric E-operator\n16:45-17:45:  Javier Fresán (École Polytechnique): E-functions and geometry (final talk)
URL:https://crc326gaus.de/event/non-hypergeometric-e-functions-5/
LOCATION:Darmstadt\, Room 244 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230124T160000
DTEND;TZID=Europe/Berlin:20230124T170000
DTSTAMP:20260404T162941
CREATED:20230118T080949Z
LAST-MODIFIED:20230118T083956Z
UID:4744-1674576000-1674579600@crc326gaus.de
SUMMARY:Tropical Covers and their Applications: from the Realizability of Tropical Pluri-Canonical Divisors to the n-gonal Construction
DESCRIPTION:Felix Röhrle (Universität Frankfurt) \nDisputation
URL:https://crc326gaus.de/event/tba-17/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 110 und Zoom
CATEGORIES:GAUS-Disputation
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230124T160000
DTEND;TZID=Europe/Berlin:20230124T170000
DTSTAMP:20260404T162941
CREATED:20221108T131957Z
LAST-MODIFIED:20230113T083616Z
UID:4212-1674576000-1674579600@crc326gaus.de
SUMMARY:Slope of Siegel modular forms: some geometric applications
DESCRIPTION:International Seminar on Automorphic Forms \nWe study the slope of modular forms on the Siegel space. We will recover known divisors of  minimal slope for $g\leq5$ and we discuss the Kodaira dimension of the moduli space of principally polarized abelian varieties $A_g$ (and eventually of the generalized Kuga’s varieties). Moreover we illustrate the cone of moving divisors on $A_g$. Partly motivated by the generalized Rankin-Cohen bracket\, we construct a non-linear holomorphic differential operator that sends Siegel modular forms to Siegel cusp forms\, and we apply it to produce new modular forms. Our construction recovers the known divisors of minimal moving slope on $A_g$ for $g\leq5$. \nRiccardo Salvati Manni (Sapienza University of Rome) \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-9/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230124T140000
DTEND;TZID=Europe/Berlin:20230124T153000
DTSTAMP:20260404T162941
CREATED:20221026T124404Z
LAST-MODIFIED:20221201T103138Z
UID:3941-1674568800-1674574200@crc326gaus.de
SUMMARY:Moduli of Langlands parameters
DESCRIPTION:Torsten Wedhorn (University Darmstadt). Finiteness of L-parameters \nThis talk follows [DHKM22\, §2]. Cover the proof of [DHKM22\, Theorem 2.3]\, and deduce [DHKM22\, Corollaries 2.4 and 2.5]. \nZoom: Meeting-ID: 61220727363 \nPassword: largest six digit prime
URL:https://crc326gaus.de/event/moduli-of-langlands-parameters-finiteness-of-l-parameters/
LOCATION:Zoom
CATEGORIES:GAUS-AG
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230124T140000
DTEND;TZID=Europe/Berlin:20230124T153000
DTSTAMP:20260404T162941
CREATED:20220929T120441Z
LAST-MODIFIED:20230206T093103Z
UID:3646-1674568800-1674574200@crc326gaus.de
SUMMARY:Buildings
DESCRIPTION:Paul Ziegler (Technical University of Munich): A Tannakian formalism for Bruhat-Tits buildings \nAbstract: By Goldman-Iwahori\, the Bruhat-Tits building of the general linear group GL_n over a local field k can be described as the set of non-archimedean norms on the vector space k^n. I will explain how via a Tannakian formalism this can be generalized to a concrete description of the Bruhat-Tits building of an arbitrary reductive group. This also gives a description of the functor of points of Bruhat-Tits group schemes. \nYou can join the Zoom meeting at\nhttps://uni-frankfurt.zoom.us/j/62173091959?pwd=eVFsaE5ndm1hVGdXQk5XTHZKWHBRZz09
URL:https://crc326gaus.de/event/tba-16/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 110 und Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230124T111500
DTEND;TZID=Europe/Berlin:20230124T124500
DTSTAMP:20260404T162941
CREATED:20230118T115643Z
LAST-MODIFIED:20230118T115643Z
UID:4756-1674558900-1674564300@crc326gaus.de
SUMMARY:K-theory of the integers and the Kummer-Vandiver conjecture
DESCRIPTION:Alexander Schmidt: A homology computation
URL:https://crc326gaus.de/event/k-theory-of-the-integers-and-the-kummer-vandiver-conjecture-8/
LOCATION:Heidelberg\, Mathematikon\, SR 8 und Zoom\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230120T133000
DTEND;TZID=Europe/Berlin:20230120T150000
DTSTAMP:20260404T162941
CREATED:20221214T125948Z
LAST-MODIFIED:20221214T125948Z
UID:4627-1674221400-1674226800@crc326gaus.de
SUMMARY:Integral p-adic cohomology for open and singular varieties
DESCRIPTION:Veronika Ertl (Universität Regensburg) \nAbstract: In this talk I will explain a joint result with Johannes Sprang and Atsushi Shiho.\nUnder certain conditions of resolutions of singularities in positive characteristic\,\nwe construct a “good” integral p-adic cohomology theory for open and singular varieties\,\nby using a version of Voevodsky’s h-topology.\nI will explain the construction and clarify in which sense our cohomology is a “good” p-adic cohomology theory.\nI will also touch on the question why a similar approach does not work in full generality without resolutions of singularities.
URL:https://crc326gaus.de/event/integral-p-adic-cohomology-for-open-and-singular-varieties-2/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230119T140000
DTEND;TZID=Europe/Berlin:20230119T160000
DTSTAMP:20260404T162941
CREATED:20221107T085125Z
LAST-MODIFIED:20221212T124637Z
UID:4157-1674136800-1674144000@crc326gaus.de
SUMMARY:The standard conjecture of Hodge type for abelian fourfolds
DESCRIPTION:Guiseppe Ancona (Strasbourg) \nLet S be a surface\, V be the Q-vector space of divisors on S modulo numerical equivalence and d be the dimension of V . The intersection product defines a non degenerate quadratic form on V . The Hodge index theorem says that it is of signature (1\, d − 1). In the Sixties Grothendieck conjectured a generalization of this statement to cycles of any codimension on a variety of any dimension. In characteristic zero this conjecture is a consequence of Hodge theory but in positive characteristic almost nothing is known. Instead of studying these quadratic forms at the archimedean place we will study them at p-adic places. It turns out that this question is more tractable\, thanks to p-adic Hodge Theory. Moreover\, using classical product formulas on quadratic forms\, the p-adic result will give non-trivial informations on the archimedean place. For instance\, we will prove the original conjecture for abelian fourfolds.
URL:https://crc326gaus.de/event/the-standard-conjecture-of-hodge-type-for-abelian-fourfolds/
LOCATION:Mainz\, Hilbertraum (05-432)
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230118T160000
DTEND;TZID=Europe/Berlin:20230118T170000
DTSTAMP:20260404T162941
CREATED:20221004T133821Z
LAST-MODIFIED:20230110T102733Z
UID:3715-1674057600-1674061200@crc326gaus.de
SUMMARY:Expanded degenerations for Hilbert schemes of points.
DESCRIPTION:Oberseminar Algebra und Geometrie \nCalla Tschanz (University of Bath) \nAbstract:\nLet X –> C be a projective family of surfaces over a curve with smooth generic fibre and simple normal crossing singularity in the special fibre X_0. We construct a good compactification of the moduli space of relative length n zero-dimensional subschemes on X\X_0 over C\{0}. In order to produce this compactification we study expansions of the special fibre X_0 together with a GIT stability condition\, generalising the work of Gulbrandsen-Halle-Hulek who use GIT to offer an alternative approach to the work of Li-Wu for Hilbert schemes of points on simple degenerations. We construct stacks which we prove to be equivalent to the  underlying stack of some choices of logarithmic Hilbert schemes produced by Maulik-Ranganathan.
URL:https://crc326gaus.de/event/tba-20/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230117T140000
DTEND;TZID=Europe/Berlin:20230117T153000
DTSTAMP:20260404T162941
CREATED:20230109T085101Z
LAST-MODIFIED:20230109T085239Z
UID:4704-1673964000-1673969400@crc326gaus.de
SUMMARY:Buildings
DESCRIPTION:Annette Werner (Goethe University): The Bruhat-Tits construction and the relation with reductive groups \nYou can join the Zoom meeting at\nhttps://uni-frankfurt.zoom.us/j/62173091959?pwd=eVFsaE5ndm1hVGdXQk5XTHZKWHBRZz09
URL:https://crc326gaus.de/event/buildings/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 110 und Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230117T140000
DTEND;TZID=Europe/Berlin:20230117T153000
DTSTAMP:20260404T162941
CREATED:20221026T123809Z
LAST-MODIFIED:20221201T102824Z
UID:3939-1673964000-1673969400@crc326gaus.de
SUMMARY:Moduli of Langlands parameters
DESCRIPTION:Alireza Shavali (Heidelberg University): Link to Galois deformation theory \nExplain some background on Galois deformation theory (cf. [Gee22\, §2\,§3]\, [B¨oc13\, §1\, §3.2]) focusing on introducing the universal framed deformation ring Rρ□ of a local Galois representation ρ : GF → GLn(Fℓ). For G = GLn\, show that the completion of the local ring of the moduli space of L-parameters at an Fℓ-point x ρ recovers Rρ□ (cf. [Hel20b]\, [Zhu20\, p.20-21]). \nZoom: Meeting-ID: 61220727363 \nPassword: largest six digit prime
URL:https://crc326gaus.de/event/moduli-of-langlands-parameters-link-to-galois-deformation-theory/
LOCATION:Zoom
CATEGORIES:GAUS-AG
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230117T111500
DTEND;TZID=Europe/Berlin:20230117T124500
DTSTAMP:20260404T162941
CREATED:20221214T131057Z
LAST-MODIFIED:20221214T131057Z
UID:4633-1673954100-1673959500@crc326gaus.de
SUMMARY:K-theory of the integers and the Kummer-Vandiver conjecture
DESCRIPTION:Rustam Steingart: The 2-torsion of K∗(Z)
URL:https://crc326gaus.de/event/k-theory-of-the-integers-and-the-kummer-vandiver-conjecture-7/
LOCATION:Heidelberg\, Mathematikon\, SR 8 und Zoom\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230117T090000
DTEND;TZID=Europe/Berlin:20230117T100000
DTSTAMP:20260404T162941
CREATED:20221108T131521Z
LAST-MODIFIED:20230109T081927Z
UID:4210-1673946000-1673949600@crc326gaus.de
SUMMARY:Sup-norms of automorphic forms on average
DESCRIPTION:International Seminar on Automorphic Forms \nBounding the sup-norms of automorphic forms has been a very active area in research in recent times.\nWhereas lot of nice results are known for small rank groups\, like GL(2)\, almost nothing is known for\, say\, Siegel or Jacobi modular forms of higher degrees. In this talk we aim to discuss some conjectures and results in this area. We use either the theory of Poincare series or averages of central values of L-functions to tackle this problem. Our methods have the benefit of having a hands-on approach and fits into many situations.\nSoumya Das (Indian Institute of Science) \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-8/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
END:VCALENDAR