BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CRC 326 - GAUS - ECPv6.15.20//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:CRC 326 - GAUS
X-ORIGINAL-URL:https://crc326gaus.de
X-WR-CALDESC:Events for CRC 326 - GAUS
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Berlin
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20210328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20211031T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20220327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20221030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20230326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20231029T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220722T133000
DTEND;TZID=Europe/Berlin:20220722T150000
DTSTAMP:20260409T164745
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:20220720T121500
DTEND;TZID=Europe/Berlin:20220720T131500
DTSTAMP:20260409T164745
CREATED:20220701T111243Z
LAST-MODIFIED:20220704T090354Z
UID:3243-1658319300-1658322900@crc326gaus.de
SUMMARY:Lecture Series "Some recent developments in singularity theory in mixed and positive characteristic algebraic geometry"
DESCRIPTION:There will be a 4-talk Lecture series on mixed characteristic algebraic geometry by Kevin Tucker (UIC) during July here in Mainz. The first talk is a Kolloquium style talk and should be interesting for (und largely understandable by) most people; and you can decide if you continue with the other 3\, more demanding (but even more rewarding)\, talks. \nTalk 1: Wednesday July 13: 12:15–13:45\nTalk 2: Monday July 18: 12:15–14:45\nTalk 3: Monday July 18: 16:15–17:45\nTalk 4: Wednesday July 20: 12:15-13:35 \nAll talks are taking place in the Hilbertraum 05-432\, Staudingerweg 9\, 55099 Mainz\, or alternatively via Zoom:\nhttps://zoom.us/j/91070632898?pwd=ODM2a1RlZ1RwdVhxVkg2dEk1Vy9CZz09 Meeting ID: 910 7063 2898 Passcode: 123123 \nTitle: Some recent developments in singularity theory in mixed and positive characteristic algebraic geometry\nSpeaker: Kevin Tucker (University of Illinois at Chicago)\nAbstract: Standard “reduction to characteristic p” techniques have long been used to relate singularities defined via the Frobenius map in positive characteristic and those arising in complex algebraic geometry and the Minimal Model Program (MMP). For example\, log terminal and F-regular singularities are known to correspond to one another via reduction to characteristic p >> 0. Exciting developments have recently made it possible to exploit these connections in the mixed characteristic setting as well\, drawing on the (conjectured) characterization of F-regular rings as splinters in positive characteristic. A ring is a splinter if it is a direct summand of every finite cover\, and Hochster’s direct summand conjecture (now a Theorem) is the modest assertion that a regular ring of any characteristic is a splinter. This conjecture was settled affirmatively by André in 2018 who proved the mixed characteristic case more than three decades after Hochster’s verification of the conjecture in equal characteristic using Frobenius techniques. In these talks\, I will discuss some recent works on splinter rings in mixed and positive characteristics. In particular\, inspired by the result of Bhatt in 2020 on the Cohen-Macaulayness of the absolute integral closure\, I will describe a global notion of splinter in the mixed characteristic setting called global +-regularity with applications to birational geometry in mixed characteristic. This can be seen as a generalization of the theory of globally F-regular pairs from positive to mixed characteristic\, and led to the successful development of the three dimensional MMP in mixed characteristics (0; p > 5).
URL:https://crc326gaus.de/event/lecture-series-on-mixed-characteristic-birational-geometry-4/
LOCATION:Mainz\, Hilbertraum (05-432) and Zoom
CATEGORIES:GAUS-Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220719T140000
DTEND;TZID=Europe/Berlin:20220719T153000
DTSTAMP:20260409T164745
CREATED:20220411T095118Z
LAST-MODIFIED:20220411T095118Z
UID:2588-1658239200-1658244600@crc326gaus.de
SUMMARY:Seminar on étale motives
DESCRIPTION:Talk 15: Comparison with algebraic K-theory – Georg Tamme (Universität Mainz)
URL:https://crc326gaus.de/event/seminar-on-etale-motives-16/
LOCATION:Darmstadt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220719T140000
DTEND;TZID=Europe/Berlin:20220719T153000
DTSTAMP:20260409T164745
CREATED:20220411T094909Z
LAST-MODIFIED:20220411T094909Z
UID:2586-1658239200-1658244600@crc326gaus.de
SUMMARY:Seminar on étale motives
DESCRIPTION:Talk 14: Interlude on algebraic K-theory – tba
URL:https://crc326gaus.de/event/seminar-on-etale-motives-15/
LOCATION:Darmstadt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220718T161500
DTEND;TZID=Europe/Berlin:20220718T174500
DTSTAMP:20260409T164745
CREATED:20220701T111115Z
LAST-MODIFIED:20220704T090302Z
UID:3241-1658160900-1658166300@crc326gaus.de
SUMMARY:Lecture Series "Some recent developments in singularity theory in mixed and positive characteristic algebraic geometry"
DESCRIPTION:There will be a 4-talk Lecture series on mixed characteristic algebraic geometry by Kevin Tucker (UIC) during July here in Mainz. The first talk is a Kolloquium style talk and should be interesting for (und largely understandable by) most people; and you can decide if you continue with the other 3\, more demanding (but even more rewarding)\, talks. \nTalk 1: Wednesday July 13: 12:15–13:45\nTalk 2: Monday July 18: 12:15–14:45\nTalk 3: Monday July 18: 16:15–17:45\nTalk 4: Wednesday July 20: 12:15-13:35 \nAll talks are taking place in the Hilbertraum 05-432\, Staudingerweg 9\, 55099 Mainz\, or alternatively via Zoom:\nhttps://zoom.us/j/91070632898?pwd=ODM2a1RlZ1RwdVhxVkg2dEk1Vy9CZz09 Meeting ID: 910 7063 2898 Passcode: 123123 \nTitle: Some recent developments in singularity theory in mixed and positive characteristic algebraic geometry\nSpeaker: Kevin Tucker (University of Illinois at Chicago)\nAbstract: Standard “reduction to characteristic p” techniques have long been used to relate singularities defined via the Frobenius map in positive characteristic and those arising in complex algebraic geometry and the Minimal Model Program (MMP). For example\, log terminal and F-regular singularities are known to correspond to one another via reduction to characteristic p >> 0. Exciting developments have recently made it possible to exploit these connections in the mixed characteristic setting as well\, drawing on the (conjectured) characterization of F-regular rings as splinters in positive characteristic. A ring is a splinter if it is a direct summand of every finite cover\, and Hochster’s direct summand conjecture (now a Theorem) is the modest assertion that a regular ring of any characteristic is a splinter. This conjecture was settled affirmatively by André in 2018 who proved the mixed characteristic case more than three decades after Hochster’s verification of the conjecture in equal characteristic using Frobenius techniques. In these talks\, I will discuss some recent works on splinter rings in mixed and positive characteristics. In particular\, inspired by the result of Bhatt in 2020 on the Cohen-Macaulayness of the absolute integral closure\, I will describe a global notion of splinter in the mixed characteristic setting called global +-regularity with applications to birational geometry in mixed characteristic. This can be seen as a generalization of the theory of globally F-regular pairs from positive to mixed characteristic\, and led to the successful development of the three dimensional MMP in mixed characteristics (0; p > 5).
URL:https://crc326gaus.de/event/lecture-series-on-mixed-characteristic-birational-geometry-3/
LOCATION:Mainz\, Hilbertraum (05-432) and Zoom
CATEGORIES:GAUS-Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220718T121500
DTEND;TZID=Europe/Berlin:20220718T144500
DTSTAMP:20260409T164745
CREATED:20220701T110952Z
LAST-MODIFIED:20220704T090227Z
UID:3239-1658146500-1658155500@crc326gaus.de
SUMMARY:Lecture Series "Some recent developments in singularity theory in mixed and positive characteristic algebraic geometry"
DESCRIPTION:There will be a 4-talk Lecture series on mixed characteristic algebraic geometry by Kevin Tucker (UIC) during July here in Mainz. The first talk is a Kolloquium style talk and should be interesting for (und largely understandable by) most people; and you can decide if you continue with the other 3\, more demanding (but even more rewarding)\, talks. \nTalk 1: Wednesday July 13: 12:15–13:45\nTalk 2: Monday July 18: 12:15–14:45\nTalk 3: Monday July 18: 16:15–17:45\nTalk 4: Wednesday July 20: 12:15-13:35 \nAll talks are taking place in the Hilbertraum 05-432\, Staudingerweg 9\, 55099 Mainz\, or alternatively via Zoom:\nhttps://zoom.us/j/91070632898?pwd=ODM2a1RlZ1RwdVhxVkg2dEk1Vy9CZz09 Meeting ID: 910 7063 2898 Passcode: 123123 \nTitle: Some recent developments in singularity theory in mixed and positive characteristic algebraic geometry\nSpeaker: Kevin Tucker (University of Illinois at Chicago)\nAbstract: Standard “reduction to characteristic p” techniques have long been used to relate singularities defined via the Frobenius map in positive characteristic and those arising in complex algebraic geometry and the Minimal Model Program (MMP). For example\, log terminal and F-regular singularities are known to correspond to one another via reduction to characteristic p >> 0. Exciting developments have recently made it possible to exploit these connections in the mixed characteristic setting as well\, drawing on the (conjectured) characterization of F-regular rings as splinters in positive characteristic. A ring is a splinter if it is a direct summand of every finite cover\, and Hochster’s direct summand conjecture (now a Theorem) is the modest assertion that a regular ring of any characteristic is a splinter. This conjecture was settled affirmatively by André in 2018 who proved the mixed characteristic case more than three decades after Hochster’s verification of the conjecture in equal characteristic using Frobenius techniques. In these talks\, I will discuss some recent works on splinter rings in mixed and positive characteristics. In particular\, inspired by the result of Bhatt in 2020 on the Cohen-Macaulayness of the absolute integral closure\, I will describe a global notion of splinter in the mixed characteristic setting called global +-regularity with applications to birational geometry in mixed characteristic. This can be seen as a generalization of the theory of globally F-regular pairs from positive to mixed characteristic\, and led to the successful development of the three dimensional MMP in mixed characteristics (0; p > 5).
URL:https://crc326gaus.de/event/lecture-series-on-mixed-characteristic-birational-geometry-2/
LOCATION:Mainz\, Hilbertraum (05-432) and Zoom
CATEGORIES:GAUS-Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220714T140000
DTEND;TZID=Europe/Berlin:20220714T160000
DTSTAMP:20260409T164745
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:20220714T111500
DTEND;TZID=Europe/Berlin:20220714T121500
DTSTAMP:20260409T164745
CREATED:20220512T085020Z
LAST-MODIFIED:20220512T085020Z
UID:2997-1657797300-1657800900@crc326gaus.de
SUMMARY:The almost purity theorem
DESCRIPTION:GAUS AG: Prismatic Cohomology (Talk 10) \nMilan Malcic\, Max Witzelsperger (Heidelberg)
URL:https://crc326gaus.de/event/the-almost-purity-theorem/
LOCATION:Heidelberg\, MATHEMATIKON\, Hörsaal
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220713T121500
DTEND;TZID=Europe/Berlin:20220713T134500
DTSTAMP:20260409T164745
CREATED:20220701T110741Z
LAST-MODIFIED:20220704T090127Z
UID:3237-1657714500-1657719900@crc326gaus.de
SUMMARY:Lecture Series "Some recent developments in singularity theory in mixed and positive characteristic algebraic geometry"
DESCRIPTION:There will be a 4-talk Lecture series on mixed characteristic algebraic geometry by Kevin Tucker (UIC) during July here in Mainz. The first talk is a Kolloquium style talk and should be interesting for (und largely understandable by) most people; and you can decide if you continue with the other 3\, more demanding (but even more rewarding)\, talks. \nTalk 1: Wednesday July 13: 12:15–13:45\nTalk 2: Monday July 18: 12:15–14:45\nTalk 3: Monday July 18: 16:15–17:45\nTalk 4: Wednesday July 20: 12:15-13:35 \nAll talks are taking place in the Hilbertraum 05-432\, Staudingerweg 9\, 55099 Mainz\, or alternatively via Zoom:\nhttps://zoom.us/j/91070632898?pwd=ODM2a1RlZ1RwdVhxVkg2dEk1Vy9CZz09 Meeting ID: 910 7063 2898 Passcode: 123123 \nTitle: Some recent developments in singularity theory in mixed and positive characteristic algebraic geometry\nSpeaker: Kevin Tucker (University of Illinois at Chicago)\nAbstract: Standard “reduction to characteristic p” techniques have long been used to relate singularities defined via the Frobenius map in positive characteristic and those arising in complex algebraic geometry and the Minimal Model Program (MMP). For example\, log terminal and F-regular singularities are known to correspond to one another via reduction to characteristic p >> 0. Exciting developments have recently made it possible to exploit these connections in the mixed characteristic setting as well\, drawing on the (conjectured) characterization of F-regular rings as splinters in positive characteristic. A ring is a splinter if it is a direct summand of every finite cover\, and Hochster’s direct summand conjecture (now a Theorem) is the modest assertion that a regular ring of any characteristic is a splinter. This conjecture was settled affirmatively by André in 2018 who proved the mixed characteristic case more than three decades after Hochster’s verification of the conjecture in equal characteristic using Frobenius techniques. In these talks\, I will discuss some recent works on splinter rings in mixed and positive characteristics. In particular\, inspired by the result of Bhatt in 2020 on the Cohen-Macaulayness of the absolute integral closure\, I will describe a global notion of splinter in the mixed characteristic setting called global +-regularity with applications to birational geometry in mixed characteristic. This can be seen as a generalization of the theory of globally F-regular pairs from positive to mixed characteristic\, and led to the successful development of the three dimensional MMP in mixed characteristics (0; p > 5).
URL:https://crc326gaus.de/event/lecture-series-on-mixed-characteristic-birational-geometry/
LOCATION:Mainz\, Hilbertraum (05-432) and Zoom
CATEGORIES:GAUS-Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220713T113000
DTEND;TZID=Europe/Berlin:20220713T154500
DTSTAMP:20260409T164745
CREATED:20220421T072147Z
LAST-MODIFIED:20220421T072147Z
UID:2751-1657711800-1657727100@crc326gaus.de
SUMMARY:The Grothendieck conjecture for curves over fields finitely generated over Q
DESCRIPTION:GAUS-AG anabelian geometry on “The Grothendieck conjecture for affine curves” \n11:30-13:00: Marius Leonhardt (Heidelberg University)\, talk 12\n14:15-15:45: Christian Dahlhausen (Heidelberg University)\, talk 13
URL:https://crc326gaus.de/event/the-grothendieck-conjecture-for-curves-over-fields-finitely-generated-over-q/
LOCATION:Heidelberg\, Mathematikon\, SR tba
CATEGORIES:GAUS-AG
ORGANIZER;CN="Tim Holzschuh":MAILTO:tholzschuh@mathi.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220712T140000
DTEND;TZID=Europe/Berlin:20220712T153000
DTSTAMP:20260409T164745
CREATED:20220411T094755Z
LAST-MODIFIED:20220411T094755Z
UID:2584-1657634400-1657639800@crc326gaus.de
SUMMARY:Seminar on étale motives
DESCRIPTION:Talk 13: Comparison rationalized Chow groups- Torsten Wedhorn (TU Darmstadt)
URL:https://crc326gaus.de/event/seminar-on-etale-motives-14/
LOCATION:Darmstadt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220708T164500
DTEND;TZID=Europe/Berlin:20220708T174500
DTSTAMP:20260409T164745
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:20220708T153000
DTEND;TZID=Europe/Berlin:20220708T163000
DTSTAMP:20260409T164745
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:20220708T140000
DTEND;TZID=Europe/Berlin:20220708T153000
DTSTAMP:20260409T164745
CREATED:20220705T083542Z
LAST-MODIFIED:20220708T081313Z
UID:3305-1657288800-1657294200@crc326gaus.de
SUMMARY:Motivic Grothendieck Lefschetz Formula
DESCRIPTION:Denis-Charles Cisinski (Universität Regensburg)
URL:https://crc326gaus.de/event/motivic-grothendieck-lefschetz-formula/
LOCATION:Online via Zoom (Darmstadt)\, Meeting-ID: 635 7328 0984\, Password: 100003
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220708T140000
DTEND;TZID=Europe/Berlin:20220708T150000
DTSTAMP:20260409T164745
CREATED:20220614T114944Z
LAST-MODIFIED:20220614T114944Z
UID:3135-1657288800-1657292400@crc326gaus.de
SUMMARY:Tropical homology over discretely valued fields
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (Third meeting Summer Semester 2022)\nMatilde Manzaroli (Universität Tübingen) \nAbstract:  The talk is about a work in progress with Emiliano Ambrosi.\nIlia Itenberg\, Ludmil Katzarkov\, Grigory Mikhalkin and Ilia Zharkov proved in “Tropical homology” that for a smooth proper family of complex varieties over the punctured disk with smooth tropicalisation X the Hodge numbers of the general fiber coincide with the dimensions of the tropical homology groups of X. We explore the possibility of extending this result over more general discrete valued fields of arithmetic interest\, such as R((t)) or Qp\, the field of p-adique numbers. In the process of doing this\, we get an action of the Galois group on the tropical homology groups and we compare this action\, in certain cases\, with the action defined by Tyler Foster in “Galois actions on analytifications and tropicalisation”.
URL:https://crc326gaus.de/event/tropical-homology-over-discretely-valued-fields/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220707T171500
DTEND;TZID=Europe/Berlin:20220707T183000
DTSTAMP:20260409T164745
CREATED:20220609T081436Z
LAST-MODIFIED:20220707T120136Z
UID:3106-1657214100-1657218600@crc326gaus.de
SUMMARY:Modularity of Galois representations\, from Ramanujan to Serre's Conjecture
DESCRIPTION:CRC Colloquium\n9. Emil Artin Lecture \nProf. Dr. Chandrashekhar Khare\, Department of Mathematics\, UCLA \nRamanujan made a series of conjectures in his 1916 paper “On some arithmetical functions’’ on what is now called the Ramanujan $\tau$ function.  Part of these conjectures were proved soon after Ramanujan formulated them by Mordell\, while one of his conjectures (which is now the first of a vast web of conjectures in the theory of automorphic forms)  took almost 6 decades to be settled (in work of Deligne). A  congruence Ramanujan observed for $\tau(n)$ modulo 691 in the same paper\,  led to Serre and Swinnerton-Dyer developing a geometric theory of mod $p$ modular forms to explain some of Ramanujan’s observations. It was in the context of the theory of mod $p$ modular forms that Serre made his modularity conjecture\, which was initially formulated in a letter of Serre to Tate in 1973.\nI will narrate  this story\, starting from Ramanujan’s work  in 1916\, to the formulation of Serre’s conjecture in 1973\,  to its resolution  in 2009 by Jean-Pierre Wintenberger and myself (using as a key ingredient the modularity lifting method developed by Wiles in his proof of Fermat’s Last Theorem). I will also try to indicate why this subject is very much alive and in spite of all the  progress still in its infancy.
URL:https://crc326gaus.de/event/modularity-of-galois-representations-from-ramanujan-to-serres-conjecture/
LOCATION:Heidelberg\, MATHEMATIKON\, Hörsaal
CATEGORIES:GAUS-Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220707T140000
DTEND;TZID=Europe/Berlin:20220707T160000
DTSTAMP:20260409T164745
CREATED:20220620T073648Z
LAST-MODIFIED:20220627T064151Z
UID:3151-1657202400-1657209600@crc326gaus.de
SUMMARY:A non-hyperpergeometric E-function
DESCRIPTION:
URL:https://crc326gaus.de/event/t-b-a-2/
LOCATION:Mainz\, Hilbertraum (05-432) and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220707T111500
DTEND;TZID=Europe/Berlin:20220707T121500
DTSTAMP:20260409T164745
CREATED:20220512T084802Z
LAST-MODIFIED:20220512T084802Z
UID:2995-1657192500-1657196100@crc326gaus.de
SUMMARY:The étale comparison Theorem and applications
DESCRIPTION:GAUS AG: Prismatic Cohomology (Talk 9) \nAmine Koubaa (Heidelberg)
URL:https://crc326gaus.de/event/the-etale-comparison-theorem-and-applications/
LOCATION:Heidelberg\, MATHEMATIKON\, Hörsaal
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220705T140000
DTEND;TZID=Europe/Berlin:20220705T153000
DTSTAMP:20260409T164745
CREATED:20220411T094630Z
LAST-MODIFIED:20220411T094630Z
UID:2582-1657029600-1657035000@crc326gaus.de
SUMMARY:Seminar on étale motives
DESCRIPTION:Talk 12: Interlude on Chow groups
URL:https://crc326gaus.de/event/seminar-on-etale-motives-13/
LOCATION:Darmstadt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220701T140000
DTEND;TZID=Europe/Berlin:20220701T173000
DTSTAMP:20260409T164745
CREATED:20220411T114804Z
LAST-MODIFIED:20220629T130220Z
UID:2599-1656684000-1656696600@crc326gaus.de
SUMMARY:The geometry of coherent sheaves: From derived categories to Higgs bundles
DESCRIPTION:GAUS-Workshop: “P=W conjecture”\n14:00-15:00: Jochen Heinloth (Duisburg-Essen)\n Introduction to the P=W conjecture\n15:15-16:15: Junliang Shen (Yale)\nSymmetries of cohomology of Hitchin moduli spaces and the P=W conjecture\n16:30-17:30: Naoki Koseki (Edinburgh)\nCohomological chi-independence for Higgs bundles and Donaldson-Thomas invariants
URL:https://crc326gaus.de/event/the-geometry-of-coherent-sheaves-from-derived-categories-to-higgs-bundles-3/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220701T140000
DTEND;TZID=Europe/Berlin:20220701T153000
DTSTAMP:20260409T164745
CREATED:20220628T081233Z
LAST-MODIFIED:20220628T081233Z
UID:3210-1656684000-1656689400@crc326gaus.de
SUMMARY:Hecke orbits on Shimura varieties of Hodge type
DESCRIPTION:Oort conjectured in 1995 that isogeny classes in the moduli space A_g of principally polarised abelian varieties in characteristic p are Zariski dense in the Newton strata containing them. There is a straightforward generalisation of this conjecture to the special fibres of Shimura varieties of Hodge type\, and in this talk\, I will present a proof of this conjecture.  I will mostly focus on the case of A_g since most of the new ideas can already be explained in this special case. This is joint work with Marco D'Addezio.\nMeeting-ID: 635 7328 0984\nPassword: 100003
URL:https://crc326gaus.de/event/hecke-orbits-on-shimura-varieties-of-hodge-type/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220701T133000
DTEND;TZID=Europe/Berlin:20220701T150000
DTSTAMP:20260409T164745
CREATED:20220624T153750Z
LAST-MODIFIED:20220624T153750Z
UID:3206-1656682200-1656687600@crc326gaus.de
SUMMARY:A descent principle for compact support cohomology theories
DESCRIPTION:Josefien Kuijper (Stockholms universitet)
URL:https://crc326gaus.de/event/a-descent-principle-for-compact-support-cohomology-theories/
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:20220630T163000
DTEND;TZID=Europe/Berlin:20220630T173000
DTSTAMP:20260409T164745
CREATED:20220330T113414Z
LAST-MODIFIED:20220621T224707Z
UID:2520-1656606600-1656610200@crc326gaus.de
SUMMARY:Heights on arbitrary Shimura Varieties and Tori
DESCRIPTION:GAUS AG: The André-Oort conjecture (Talk 12) \nJacob Tsimerman (University of Toronto) \nAbstract: We explain how to prove upper bounds for heights of special points on arbitrary Shimura Varieties\, completing the proof after the work of Binyamini-Schmidt-Yafaev. The proof in fact reduces to the case of A_g\, and thus requires a comparison of height functions between distinct Shimura varieties. To facilitate this\, we introduce a  canonical height function corresponding to automorphic vector bundles on it and explain their functorial properties. This is achieved using relative p-adic Hodge theory\, combining the de-Rham and crystalline formalisms. This also reduces the question of bounding these canonical heights in  0-dimensional settings. Finally\, we explain how a trick of Deligne allows us to conclude this case using functoriality and the Abelian case.
URL:https://crc326gaus.de/event/tbd/
LOCATION:Darmstadt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220630T151500
DTEND;TZID=Europe/Berlin:20220630T161500
DTSTAMP:20260409T164745
CREATED:20220330T113253Z
LAST-MODIFIED:20220422T141256Z
UID:2518-1656602100-1656605700@crc326gaus.de
SUMMARY:The André-Oort conjecture for A_g : Galois lower bounds for CM abelian varieties - after Tsimerman and Binyamini-Schmidt-Yafaev.
DESCRIPTION:GAUS AG: The André-Oort conjecture (Talk 11) \nYingkun Li (TU Darmstadt)
URL:https://crc326gaus.de/event/the-andre-oort-conjecture-for-a-g-galois-lower-bounds-for-cm-abelian-varieties-after-tsimerman-and-binyamini-schmidt-yafaev/
LOCATION:Darmstadt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220630T111500
DTEND;TZID=Europe/Berlin:20220630T121500
DTSTAMP:20260409T164745
CREATED:20220512T084606Z
LAST-MODIFIED:20220512T084606Z
UID:2993-1656587700-1656591300@crc326gaus.de
SUMMARY:Perfectoidization
DESCRIPTION:GAUS AG: Prismatic Cohomology (Talk 8) \nJakob Burgi (Heidelberg)
URL:https://crc326gaus.de/event/perfectoidization/
LOCATION:Heidelberg\, MATHEMATIKON\, Hörsaal
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220629T160000
DTEND;TZID=Europe/Berlin:20220629T170000
DTSTAMP:20260409T164745
CREATED:20220509T111933Z
LAST-MODIFIED:20220613T085145Z
UID:2943-1656518400-1656522000@crc326gaus.de
SUMMARY:What is a building and why should one care?
DESCRIPTION:Oberseminar Algebra und Geometrie \nPetra Schwer (Otto-von-Guericke-Universität Magdeburg) \nAbstract:\nGroups like GL_n\, SL_n or SP_n  play an important role in many areas of mathematics. It has been known for a long time that some of their properties (when studied over the reals or complex numbers) are best understood via the associated symmetric spaces. Jaques Tits later introduced buildings as a tool to study the respective groups over other field and developed\, together with Bruhat\, a theory that also captures reductive groups evaluated over non-archimedian local fields with discrete valuations\, like the p-adic numbers. \nIn this talk I will explain how some of the subgroup structures of such a reductive group over a non-Archimedian local field can be explained via Coxeter combinatorics and the geometry of an (affine) Bruhat-Tits building\, its apartments and retractions. The building for example simultaneously encodes the (affine) flag variety and (affine) Grassmannian associated to the group. But it also permits to explain more complicated structures such as representation theoretic data or other associated varieties in purely combinatorial terms.
URL:https://crc326gaus.de/event/tba-6/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220628T160000
DTEND;TZID=Europe/Berlin:20220628T170000
DTSTAMP:20260409T164745
CREATED:20220509T104514Z
LAST-MODIFIED:20220509T104514Z
UID:2938-1656432000-1656435600@crc326gaus.de
SUMMARY:International Seminar on Automorphic Forms
DESCRIPTION:
URL:https://crc326gaus.de/event/international-seminar-on-automorphic-forms-8/
LOCATION:Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220628T140000
DTEND;TZID=Europe/Berlin:20220628T153000
DTSTAMP:20260409T164745
CREATED:20220411T094516Z
LAST-MODIFIED:20220411T094516Z
UID:2580-1656424800-1656430200@crc326gaus.de
SUMMARY:Seminar on étale motives
DESCRIPTION:Talk 11: Motives and h-descent- Thibaud van den Hove (TU darmstadt)
URL:https://crc326gaus.de/event/seminar-on-etale-motives-12/
LOCATION:Darmstadt
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220624T133000
DTEND;TZID=Europe/Berlin:20220624T150000
DTSTAMP:20260409T164745
CREATED:20220617T113551Z
LAST-MODIFIED:20220617T113642Z
UID:3145-1656077400-1656082800@crc326gaus.de
SUMMARY:On geometric linear and quadratic Chabauty
DESCRIPTION:Pim Spelier (Universiteit Leiden)
URL:https://crc326gaus.de/event/on-geometric-linear-and-quadratic-chabauty/
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:20220623T163000
DTEND;TZID=Europe/Berlin:20220623T173000
DTSTAMP:20260409T164745
CREATED:20220330T112801Z
LAST-MODIFIED:20220422T141357Z
UID:2516-1656001800-1656005400@crc326gaus.de
SUMMARY:The André-Oort conjecture.
DESCRIPTION:GAUS AG: The André-Oort conjecture (Talk 10) \nRiccardo Zuffetti (TU Darmstadt)
URL:https://crc326gaus.de/event/the-andre-oort-conjecture/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
END:VCALENDAR