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X-WR-CALDESC:Events for CRC 326 - GAUS
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240322T103000
DTEND;TZID=Europe/Berlin:20240322T130000
DTSTAMP:20260423T125809
CREATED:20240131T094859Z
LAST-MODIFIED:20240318T081311Z
UID:7645-1711103400-1711112400@crc326gaus.de
SUMMARY:Ruth Moufang Lectures 2024 (2nd lecture)
DESCRIPTION:The Ruth Moufang Lectures will have their fourth iteration on March 21st and 22nd\, 2024 in Frankfurt am Main. We are happy to announce that our speaker will be Ana Caraiani. \nAna Caraiani (Imperial College London) – Seminar talks \n“On the cohomology of Shimura varieties with torsion coefficients” (10:30-11:30)\nAbstract: I will survey results concerning the cohomology of Shimura varieties with torsion coefficients from the past few years. I will discuss the geometry of the Hodge-Tate period morphism\, including a recent generalisation of Igusa varieties to Igusa stacks due to Mingjia Zhang. Then I will contrast the original approach of computing cohomology with torsion coefficients due to myself and Peter Scholze\, which relies on the trace formula\, with more recent approaches due to Teruhisa Koshikawa\, Linus Hamann and Si Ying Lee\, who rely on deep local results. Finally\, I will explain how\, by combining the two approaches\, one can obtain a new instance of local-global compatibility.\n“On the modularity of elliptic curves over imaginary quadratic fields” (12:00-13:00)\nAbstract: I will survey how to prove the modularity of elliptic curves defined over the rational numbers\, as pioneered by Wiles and Taylor-Wiles and completed by Breuil\, Conrad\, Diamond and Taylor. I will also mention the case of elliptic curves defined over real quadratic fields\, more recently completed by Freitas\, Le Hung and Siksek. I will then explain why the case of imaginary quadratic fields is qualitatively different from the previous ones. Finally\, I will discuss joint work with James Newton\, where we prove a local-global compatibility result in the crystalline case for Galois representations attached to torsion classes occurring in the cohomology of locally symmetric spaces. This has an application to the modularity of elliptic curves over imaginary quadratic fields\, which also builds on recent work of Allen\, Khare and Thorne.
URL:https://crc326gaus.de/event/ruth-moufang-lectures-2024-2nd-lecture/
LOCATION:Frankfurt\, Hilbertraum\, Rober-Mayer-Str. 6-8\, Raum 302
CATEGORIES:GAUS-Event
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240321T171500
DTEND;TZID=Europe/Berlin:20240321T181500
DTSTAMP:20260423T125809
CREATED:20240131T094620Z
LAST-MODIFIED:20240318T080314Z
UID:7642-1711041300-1711044900@crc326gaus.de
SUMMARY:Ruth Moufang Lectures 2024 (1st lecture)
DESCRIPTION:The Ruth Moufang Lectures will have their fourth iteration on March 21st and 22nd\, 2024 in Frankfurt am Main. We are happy to announce that our speaker will be Ana Caraiani. \nAna Caraiani (Imperial College London) – Colloquium “Elliptic curves and modularity” \nAbstract: The goal of this talk is to give you a glimpse of the Langlands program\, a central topic at the intersection of algebraic number theory\, algebraic geometry and representation theory. I will focus on a celebrated instance of the Langlands correspondence\, namely the modularity of elliptic curves. In the first part of the talk\, I will give an explicit example\, discuss the different meanings of modularity for rational elliptic curves\, and mention applications. In the second part of the talk\, I will discuss what is known about the modularity of elliptic curves over more general number fields.
URL:https://crc326gaus.de/event/ruth-moufang-lectures-2024-1st-lecture/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Event
ORGANIZER;CN="Gebhard B%C3%B6ckle":MAILTO:gebhard.boeckle iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240318
DTEND;VALUE=DATE:20240323
DTSTAMP:20260423T125809
CREATED:20230928T101612Z
LAST-MODIFIED:20240226T132904Z
UID:6284-1710720000-1711151999@crc326gaus.de
SUMMARY:Motives in Mainz
DESCRIPTION:
URL:https://crc326gaus.de/event/motives-in-mainz/
LOCATION:Mainz\, Schulz-Horner-Gebäude\, Lecture Hall C03
CATEGORIES:GAUS-Workshop
ORGANIZER;CN="Tom Bachmann":MAILTO:tom.bachmann@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240311
DTEND;VALUE=DATE:20240316
DTSTAMP:20260423T125809
CREATED:20230928T102111Z
LAST-MODIFIED:20240214T104316Z
UID:6287-1710115200-1710547199@crc326gaus.de
SUMMARY:Winter school on unstable motivic homotopy theory
DESCRIPTION:
URL:https://crc326gaus.de/event/winter-school-on-unstable-motivic-homotopy-theory/
LOCATION:Mainz\, Schulz-Horner-Gebäude\, Lecture Hall C03
CATEGORIES:GAUS-Workshop
ORGANIZER;CN="Tom Bachmann":MAILTO:tom.bachmann@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240304T080000
DTEND;TZID=Europe/Berlin:20240308T170000
DTSTAMP:20260423T125809
CREATED:20240205T124444Z
LAST-MODIFIED:20240305T090013Z
UID:7715-1709539200-1709917200@crc326gaus.de
SUMMARY:Spring school on Non-Archimedean Geometry\, Birational Geometry and Resolution of Singularities
DESCRIPTION:
URL:https://crc326gaus.de/event/spring-school-on-non-archimedean-geometry-birational-geometry-and-resolution-of-singularities/
LOCATION:Heidelberg
CATEGORIES:GAUS-Workshop
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240226
DTEND;VALUE=DATE:20240302
DTSTAMP:20260423T125809
CREATED:20231128T135752Z
LAST-MODIFIED:20231128T135752Z
UID:7309-1708905600-1709337599@crc326gaus.de
SUMMARY:Conference on A Panorama of Moduli Spaces
DESCRIPTION:https://sites.google.com/view/panoramaofmodulispaces/home
URL:https://crc326gaus.de/event/conference-on-a-panorama-of-moduli-spaces/
LOCATION:Frankfurt am Main
CATEGORIES:GAUS-Workshop
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240214T080000
DTEND;TZID=Europe/Berlin:20240216T180000
DTSTAMP:20260423T125809
CREATED:20231116T154117Z
LAST-MODIFIED:20231116T154117Z
UID:7028-1707897600-1708106400@crc326gaus.de
SUMMARY:Winter workshop Chabauty--Kim
DESCRIPTION:
URL:https://crc326gaus.de/event/winter-workshop-chabauty-kim/
LOCATION:Heidelberg
CATEGORIES:GAUS-Workshop
ORGANIZER;CN="Marius Leonhardt":MAILTO:mleonhardt@mathi.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240209T140000
DTEND;TZID=Europe/Berlin:20240209T153000
DTSTAMP:20260423T125809
CREATED:20231016T111058Z
LAST-MODIFIED:20240202T135000Z
UID:6702-1707487200-1707492600@crc326gaus.de
SUMMARY:Motivic tt-geometry
DESCRIPTION:Seminar on Arithmetic Geometry \nMartin Gallauer (University of Warwick) \nCommutative rings are profitably studied from a geometric point of view\, giving rise to the field of algebraic geometry. “Categorified commutative rings” (e.g. tt-categories) can similarly be studied geometrically\, leading to a field called tt-geometry. I will introduce these ideas and focus on recent progress regarding tt-categories arising in the motivic theory. (Based on joint work with Paul Balmer). \nZoom (635 7328 0984\, Password: smallest six digit prime).
URL:https://crc326gaus.de/event/tba-88/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240209T101500
DTEND;TZID=Europe/Berlin:20240209T114500
DTSTAMP:20260423T125809
CREATED:20231121T125230Z
LAST-MODIFIED:20240110T141857Z
UID:7189-1707473700-1707479100@crc326gaus.de
SUMMARY:Exodromy
DESCRIPTION:Marcin Lara (Universität Mainz): Galois categories
URL:https://crc326gaus.de/event/exodromy-14/
LOCATION:Mainz\, Raum 05-514
CATEGORIES:GAUS-AG
ORGANIZER;CN="Tom Bachmann":MAILTO:tom.bachmann@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240209T091500
DTEND;TZID=Europe/Berlin:20240209T104500
DTSTAMP:20260423T125809
CREATED:20240110T134811Z
LAST-MODIFIED:20240110T134811Z
UID:7573-1707470100-1707475500@crc326gaus.de
SUMMARY:Rigid meromorphic cocycles
DESCRIPTION:Riccardo Zuffetti (TU Darmstadt): Rigid meromorphic cocycles for orthogonal groups II
URL:https://crc326gaus.de/event/rigid-meromorphic-cocycles-13/
LOCATION:Heidelberg\, Mathematikon\, SR 8 und Zoom\, Germany
CATEGORIES:GAUS-AG
ORGANIZER;CN="O%C4%9Fuz Gezmi%C5%9F":MAILTO:oguz.gezmis@iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240208T150000
DTEND;TZID=Europe/Berlin:20240208T163000
DTSTAMP:20260423T125809
CREATED:20231009T095925Z
LAST-MODIFIED:20231115T100914Z
UID:6394-1707404400-1707409800@crc326gaus.de
SUMMARY:Rigid Analytic Motives
DESCRIPTION:Talk 13: Jonathan Miles (Goethe University Frankfurt):  The Hyodo–Kato cohomology \nTalk 14: Thibaud van den Hove (TU Darmstadt): The de Rham–Fargues–Fontaine cohomology \nZoom meeting ID: 612 2072 7363\, Password: Largest six digit prime number.
URL:https://crc326gaus.de/event/rigid-analytic-motives-27/
LOCATION:Darmstadt\, Room 244 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240208T110000
DTEND;TZID=Europe/Berlin:20240208T130000
DTSTAMP:20260423T125809
CREATED:20231010T133513Z
LAST-MODIFIED:20231121T102911Z
UID:6545-1707390000-1707397200@crc326gaus.de
SUMMARY:Emerton-Gee-Stacks
DESCRIPTION:Talk 13: Jakob Burgi (Universität Heidelberg): Categorical Langlands
URL:https://crc326gaus.de/event/emerton-gee-stacks-13/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240207T141500
DTEND;TZID=Europe/Berlin:20240207T163000
DTSTAMP:20260423T125809
CREATED:20231024T092104Z
LAST-MODIFIED:20240203T191234Z
UID:6775-1707315300-1707323400@crc326gaus.de
SUMMARY:Anabelian geometry
DESCRIPTION:14:15 – 15:15 Talk 13: Magnus Carlsson (Goethe Universität Frankfurt): Birational liftability: reduction to number fields \n15:30 – 16:30 Talk 14: Katharina Hübner (Goethe Universität Frankfurt): Birational liftability: proving main theorems
URL:https://crc326gaus.de/event/anabelian-geometry-5/
LOCATION:Frankfurt\, Robert-Mayer-Str. 6-8\, Raum 310\, Deutschland
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240206T160000
DTEND;TZID=Europe/Berlin:20240206T170000
DTSTAMP:20260423T125809
CREATED:20231009T105725Z
LAST-MODIFIED:20240130T085731Z
UID:6422-1707235200-1707238800@crc326gaus.de
SUMMARY:Evaluating the wild Brauer group
DESCRIPTION:International Seminar on Automorphic Forms \nRachel Newton (King’s College London) \nThe local-global approach to the study of rational points on varieties over number fields begins by embedding the set of rational points on a variety X into the set of its adelic points. The Brauer–Manin pairing cuts out a subset of the adelic points\, called the Brauer–Manin set\, that contains the rational points. If the set of adelic points is non-empty but the Brauer–Manin set is empty then we say there’s a Brauer–Manin obstruction to the existence of rational points on X. Computing the Brauer–Manin pairing involves evaluating elements of the Brauer group of X at local points. If an element of the Brauer group has order coprime to p\, then its evaluation at a p-adic point factors via reduction of the point modulo p. For p-torsion elements this is no longer the case: in order to compute the evaluation map one must know the point to a higher p-adic precision. Classifying Brauer group elements according to the precision required to evaluate them at p-adic points gives a filtration which we describe using work of Bloch and Kato. Applications of our work include addressing Swinnerton-Dyer’s question about which places can play a role in the Brauer–Manin obstruction. This is joint work with Martin Bright. \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/tba-72/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240202T160000
DTEND;TZID=Europe/Berlin:20240202T170000
DTSTAMP:20260423T125809
CREATED:20240123T143136Z
LAST-MODIFIED:20240123T143136Z
UID:7615-1706889600-1706893200@crc326gaus.de
SUMMARY:Category of matroids with coefficients
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (Second meeting Winter Semester 2023/24) \nManoel Zanoelo Jarra (Universität Groningen) \nAbstract: Matroids are combinatorial abstractions of the concept of independence in linear algebra. There is a way back: when representing a matroid over a field we get a linear subspace. Another algebraic object for which we can represent matroids is the semifield of tropical numbers\, which gives us valuated matroids. In this talk we introduce Baker-Bowler’s theory of matroids with coefficients\, which recovers both classical and valuated matroids\, as well linear subspaces\, and we show how to give a categorical treatment to these objects that respects matroidal constructions\, as minors and duality. This is a joint work with Oliver Lorscheid and Eduardo Vital.
URL:https://crc326gaus.de/event/category-of-matroids-with-coefficients/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240202T153000
DTEND;TZID=Europe/Berlin:20240202T170000
DTSTAMP:20260423T125809
CREATED:20231016T111637Z
LAST-MODIFIED:20240123T160047Z
UID:6708-1706887800-1706893200@crc326gaus.de
SUMMARY:Gluing sheaves along Harder-Narasimhan strata of Bun_2.
DESCRIPTION:Seminar on Arithmetic Geometry \nJonathan Miles (University of Frankfurt) \nWe explain how to glue sheaves on the moduli stack of G-bundles on the Fargues-Fontaine curve. In the case of prime-to-p torsion coefficients\, the category D_ét(Bun_G) can be thought of as an approximation of the automorphic data appearing in the geometrization of the local Langlands correspondence due to Fargues-Scholze. The stratification of Bun_G arising from the Harder-Narasimhan slope formalism on G-isocrystals yields a semi-orthogonal decomposition of D_ét(Bun_G) into the derived categories of smooth representations of inner forms of Levi subgroups of G. Between such categories there is a (partial) six functor formalism that can be used to compute how sheaves arising on a quasi-compact open substack interact with sheaves on higher strata via nearby cycles functors\, which can be interpreted as a derived analogue of Jacquet restriction functors for parabolic subgroups of G (up to inner twisting). We eventually restrict to G=GL_2 and to sufficiently nice coefficients (notably this includes an algebraic closure of F_\ell and Z/\ell^n Z for almost all \ell prime to p)\, and we will explain how these computations fundamentally reduce to the étale cohomology of p-adic analogues of locally symmetric spaces\, such as the Bruhat-Tits building and moduli spaces of mixed p-adic Hodge structures. \nZoom (635 7328 0984\, Password: smallest six digit prime).
URL:https://crc326gaus.de/event/tba-91/
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:20240202T143000
DTEND;TZID=Europe/Berlin:20240202T153000
DTSTAMP:20260423T125809
CREATED:20240123T143810Z
LAST-MODIFIED:20240123T143810Z
UID:7614-1706884200-1706887800@crc326gaus.de
SUMMARY:Hard Lefschetz theorem and Hodge-Riemann relations for convex valuations
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (Second meeting Winter Semester 2023/24) \nAndreas Bernig (Goethe-Universität Frankfurt) \nAbstract: The hard Lefschetz theorem and the Hodge-Riemann relations have their origin in the cohomology theory of compact Kähler manifolds. In recent years it has become clear that similar results hold in many different settings\, in particular in algebraic geometry and combinatorics (work by Adiprasito\, Huh and others). In a recent joint work with Jan Kotrbatý and Thomas Wannerer\, we prove the hard Lefschetz theorem and Hodge-Riemann relations for valuations on convex bodies. These results can be translated into an array of quadratic inequalities for mixed volumes of smooth convex bodies\, giving a smooth analogue of the quadratic inequalities in McMullen’s polytope algebra. Surprinsingly\, these inequalities fail for general convex bodies. Our proof uses elliptic operators and perturbation theory of unbounded operators.
URL:https://crc326gaus.de/event/hard-lefschetz-theorem-and-hodge-riemann-relations-for-convex-valuations-2/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240202T133000
DTEND;TZID=Europe/Berlin:20240202T150000
DTSTAMP:20260423T125809
CREATED:20240126T120455Z
LAST-MODIFIED:20240126T120455Z
UID:7637-1706880600-1706886000@crc326gaus.de
SUMMARY:On Voevodsky's reconstruction theorem
DESCRIPTION:Sebastian Wolf (Universität Regensburg) \nIn 1990\, Voevodsky proved a conjecture of Grothendieck\, that morphisms of normal schemes of finite type over the rational numbers can be reconstructed from the induced morphism of étale topoi. The goal of this talk is to give an outline of Voevodsky’s proof and explain how to extend it to certain sufficiently nice singular schemes. If time permits\, we will also see what one has to modify to make it work in positive characteristic. This is joint work with Peter Haine.
URL:https://crc326gaus.de/event/on-voevodskys-reconstruction-theorem/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Tim Holzschuh":MAILTO:tholzschuh@mathi.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240202T101500
DTEND;TZID=Europe/Berlin:20240202T114500
DTSTAMP:20260423T125809
CREATED:20231121T125101Z
LAST-MODIFIED:20240110T141939Z
UID:7187-1706868900-1706874300@crc326gaus.de
SUMMARY:Exodromy
DESCRIPTION:Tom Bachmann (Universität Mainz): Spectral higher topoi
URL:https://crc326gaus.de/event/exodromy-13/
LOCATION:Mainz\, Raum 05-514
CATEGORIES:GAUS-AG
ORGANIZER;CN="Tom Bachmann":MAILTO:tom.bachmann@uni-mainz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240202T091500
DTEND;TZID=Europe/Berlin:20240202T104500
DTSTAMP:20260423T125809
CREATED:20240110T134428Z
LAST-MODIFIED:20240110T134428Z
UID:7571-1706865300-1706870700@crc326gaus.de
SUMMARY:Rigid meromorphic cocycles
DESCRIPTION:Yingkun Li (TU Darmstadt): Rigid meromorphic cocycles for orthogonal groups I
URL:https://crc326gaus.de/event/rigid-meromorphic-cocycles-12/
LOCATION:Heidelberg\, Mathematikon\, SR 8 und Zoom\, Germany
CATEGORIES:GAUS-AG
ORGANIZER;CN="O%C4%9Fuz Gezmi%C5%9F":MAILTO:oguz.gezmis@iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240201T151500
DTEND;TZID=Europe/Berlin:20240201T164500
DTSTAMP:20260423T125809
CREATED:20230809T124330Z
LAST-MODIFIED:20230809T130512Z
UID:6164-1706800500-1706805900@crc326gaus.de
SUMMARY:Rigid Analytic Motives
DESCRIPTION:Meeting ID:612 2072 7363\, Password: largest six digit prime
URL:https://crc326gaus.de/event/rigid-analytic-motives-14/
LOCATION:Darmstadt\, Room 244 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240201T150000
DTEND;TZID=Europe/Berlin:20240201T163000
DTSTAMP:20260423T125809
CREATED:20231120T113029Z
LAST-MODIFIED:20231220T073332Z
UID:7102-1706799600-1706805000@crc326gaus.de
SUMMARY:Rigid Analytic Motives
DESCRIPTION:Talk 11: Rizacan Ciloglu (TU Darmstadt): Extending realization functors \nTalk 12: Torsten Wedhorn (TU Darmstadt): The de Rham realisation functor \nZoom (612 2072 7363\, Password: largest six digit prime number)
URL:https://crc326gaus.de/event/rigid-analytic-motives/
LOCATION:Darmstadt\, Room 244 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240201T141500
DTEND;TZID=Europe/Berlin:20240201T151500
DTSTAMP:20260423T125809
CREATED:20231012T090600Z
LAST-MODIFIED:20240125T100727Z
UID:6656-1706796900-1706800500@crc326gaus.de
SUMMARY:On the motivic fundamental group
DESCRIPTION:Emil Jacobsen (Stockholm) \nAbstract: I will introduce the motivic fundamental group of a smooth variety\, and explain its relation to the usual fundamental group. The main result can also be phrased as follows: local systems of geometric origin are stable under extension in the category of local systems. I will also present a motivic version of a classical theorem of Hain\, on Malcev completions of monodromy representations. At the end\, I’ll explain some of the group/representation theoretic tools that go into these result. \nZoom Meeting-ID: 967 5163 9626 \nPasscode: last name of famous mathematician born in Königsberg (small letters)
URL:https://crc326gaus.de/event/tba-80/
LOCATION:Mainz\, Hilbertraum 05-432
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240201T110000
DTEND;TZID=Europe/Berlin:20240201T130000
DTSTAMP:20260423T125809
CREATED:20231010T133327Z
LAST-MODIFIED:20231121T150627Z
UID:6543-1706785200-1706792400@crc326gaus.de
SUMMARY:Emerton-Gee-Stacks
DESCRIPTION:Talk 12: Alireza Shavali (Universität Heidelberg): Crystalline Lifts
URL:https://crc326gaus.de/event/emerton-gee-stacks-12/
LOCATION:Heidelberg\, Mathematikon\, SR 8 and Zoom\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240131T131500
DTEND;TZID=Europe/Berlin:20240131T170000
DTSTAMP:20260423T125809
CREATED:20240116T122759Z
LAST-MODIFIED:20240116T122759Z
UID:7589-1706706900-1706720400@crc326gaus.de
SUMMARY:Anabelian geometry
DESCRIPTION:13:15 – 14:15  Talk 10: Amine Koubaa (Goethe Universität Frankfurt): SC over fields of finite type: main theorems \n14:30 – 15:30  Talk 11: Tim Holzschuh (Universität Heidelberg): Birational liftability: intro \n16:00 – 17:00  Talk 12: Leonie Scherer (Goethe Universität Frankfurt): Birational liftability: main tool
URL:https://crc326gaus.de/event/anabelian-geometry-6/
LOCATION:Heidelberg\, MATHEMATIKON\, SR A\, Deutschland
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240130T160000
DTEND;TZID=Europe/Berlin:20240130T170000
DTSTAMP:20260423T125809
CREATED:20231009T105559Z
LAST-MODIFIED:20240123T160326Z
UID:6420-1706630400-1706634000@crc326gaus.de
SUMMARY:Six-dimensional sphere packing and linear programming
DESCRIPTION:International Seminar on Automorphic Forms \nMatthew de Courcy-Ireland (Stockholm University) \nThis talk is based on joint work with Maria Dostert and Maryna Viazovska. We prove that the Cohn–Elkies linear programming bound is not sharp for sphere packing in dimension 6. This is in contrast to Viazovska’s sharp bound in dimension 8\, even though it is believed that closely related lattices achieve the optimal densities in both dimensions. The proof uses modular forms to construct feasible points in a dual program\, generalizing a construction of Cohn and Triantafillou to the case of odd weight and non-trivial Dirichlet character. Non-sharpness of linear programming is demonstrated by comparing this dual bound to a stronger upper bound obtained from semidefinite programming by Cohn\, de Laat\, and Salmon. Our construction has vanishing Fourier coefficients along an arithmetic progression\, which can be explained using skew self-adjointness of Hecke operators. \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/tba-71/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240126T160000
DTEND;TZID=Europe/Berlin:20240126T170000
DTSTAMP:20260423T125809
CREATED:20231221T132521Z
LAST-MODIFIED:20240123T144823Z
UID:7519-1706284800-1706288400@crc326gaus.de
SUMMARY:Category of matroids with coefficients
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (Second meeting Winter Semester 2023/24) \nCancelled: postponed to February 02 \nManoel Zanoelo Jarra (Universität Groningen) \nAbstract: Matroids are combinatorial abstractions of the concept of independence in linear algebra. There is a way back: when representing a matroid over a field we get a linear subspace. Another algebraic object for which we can represent matroids is the semifield of tropical numbers\, which gives us valuated matroids. In this talk we introduce Baker-Bowler’s theory of matroids with coefficients\, which recovers both classical and valuated matroids\, as well linear subspaces\, and we show how to give a categorical treatment to these objects that respects matroidal constructions\, as minors and duality. This is a joint work with Oliver Lorscheid and Eduardo Vital.
URL:https://crc326gaus.de/event/tba-95/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240126T153000
DTEND;TZID=Europe/Berlin:20240126T170000
DTSTAMP:20260423T125809
CREATED:20231016T111405Z
LAST-MODIFIED:20240117T141441Z
UID:6706-1706283000-1706288400@crc326gaus.de
SUMMARY:Doing geometry by counting points
DESCRIPTION:Seminar on Arithmetic Geometry \nPaul Ziegler (TU Darmstadt) \nFor a family of polynomials in several variables with integral coefficients\, the Weil conjectures give a surprising relationship between the geometry of the complex-valued roots of these polynomials and the number of roots of these polynomials “modulo p”. I will give an introduction to this circle of results and an application motivated by the concept of mirror symmetry from physics. \nZoom (635 7328 0984\, Password: smallest six digit prime).
URL:https://crc326gaus.de/event/tba-90/
LOCATION:Darmstadt\, Room 244 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240126T143000
DTEND;TZID=Europe/Berlin:20240126T153000
DTSTAMP:20260423T125809
CREATED:20240108T113933Z
LAST-MODIFIED:20240123T144642Z
UID:7541-1706279400-1706283000@crc326gaus.de
SUMMARY:Hard Lefschetz theorem and Hodge-Riemann relations for convex valuations
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (Second meeting Winter Semester 2023/24) \nCancelled: postponed to February 02 \nAndreas Bernig (Goethe-Universität Frankfurt) \nAbstract: The hard Lefschetz theorem and the Hodge-Riemann relations have their origin in the cohomology theory of compact Kähler manifolds. In recent years it has become clear that similar results hold in many different settings\, in particular in algebraic geometry and combinatorics (work by Adiprasito\, Huh and others). In a recent joint work with Jan Kotrbatý and Thomas Wannerer\, we prove the hard Lefschetz theorem and Hodge-Riemann relations for valuations on convex bodies. These results can be translated into an array of quadratic inequalities for mixed volumes of smooth convex bodies\, giving a smooth analogue of the quadratic inequalities in McMullen’s polytope algebra. Surprinsingly\, these inequalities fail for general convex bodies. Our proof uses elliptic operators and perturbation theory of unbounded operators.
URL:https://crc326gaus.de/event/hard-lefschetz-theorem-and-hodge-riemann-relations-for-convex-valuations/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240126T101500
DTEND;TZID=Europe/Berlin:20240126T114500
DTSTAMP:20260423T125809
CREATED:20231121T124951Z
LAST-MODIFIED:20240110T141537Z
UID:7185-1706264100-1706269500@crc326gaus.de
SUMMARY:Exodromy
DESCRIPTION:Alisa Kannen (Universität Mainz): Stratified higher topoi
URL:https://crc326gaus.de/event/exodromy-12/
LOCATION:Mainz\, Raum 05-514
CATEGORIES:GAUS-AG
ORGANIZER;CN="Tom Bachmann":MAILTO:tom.bachmann@uni-mainz.de
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END:VCALENDAR