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X-ORIGINAL-URL:https://crc326gaus.de
X-WR-CALDESC:Events for CRC 326 - GAUS
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240503T143000
DTEND;TZID=Europe/Berlin:20240503T153000
DTSTAMP:20260531T103854
CREATED:20240422T074136Z
LAST-MODIFIED:20240422T074136Z
UID:8243-1714746600-1714750200@crc326gaus.de
SUMMARY:Nobodies are perfect\, semigroups are not.
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (First meeting Summer Semester 2024) \nKarin Schaller (FU Berlin) \nAbstract: NObodies are asymptotic limits of certain valuation semigroups. Their construction depends on a given flag of subvarieties. We investigate toric surfaces together with non-toric flags and determine when the associated valuation semigroups are finitely generated. This is a joint work with K. Altmann\, C. Haase\, A. Küronya\, and L. Walter.
URL:https://crc326gaus.de/event/nobodies-are-perfect-semigroups-are-not/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240503T153000
DTEND;TZID=Europe/Berlin:20240503T170000
DTSTAMP:20260531T103854
CREATED:20240405T092117Z
LAST-MODIFIED:20240430T062912Z
UID:8075-1714750200-1714755600@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Tariq Syed (Johannes Gutenberg-Universität Mainz):  Motivic cohomology of cyclic coverings \nMany examples of topologically contractible smooth affine complex varieties are given by cyclic coverings. In this talk\, we present new results on the motivic cohomology of such cyclic coverings. \nZoom 635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-2/
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:20240503T160000
DTEND;TZID=Europe/Berlin:20240503T170000
DTSTAMP:20260531T103854
CREATED:20240422T074409Z
LAST-MODIFIED:20240422T074409Z
UID:8245-1714752000-1714755600@crc326gaus.de
SUMMARY:The realization space of a matroid
DESCRIPTION:TGiF-Seminar: Tropical geometry in Frankfurt (First meeting Summer Semester 2024) \nLukas Kühne (Universität Bielefeld) \nAbstract: A matroid is a fundamental and widely studied object in combinatorics. Following a brief introduction to matroids\, I will showcase parts of a new OSCAR module for matroids using several examples. My emphasis will be on the computation of the realization space of a matroid\, which is the space of all hyperplane arrangements that have the given matroid as their intersection lattice. \nIn the second part\, I will discuss an application in the realm of algebraic geometry\, namely a novel connection between matroid realization spaces and the elliptic modular surfaces.
URL:https://crc326gaus.de/event/the-realization-space-of-a-matroid/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240507T160000
DTEND;TZID=Europe/Berlin:20240507T170000
DTSTAMP:20260531T103854
CREATED:20240429T083020Z
LAST-MODIFIED:20240502T093807Z
UID:8313-1715097600-1715101200@crc326gaus.de
SUMMARY:Quadratic reciprocity in a polynomial ring
DESCRIPTION:International Seminar on Automorphic Forms \nWilliam Duke (UCLA) \nI will give a characterization of when a kind of quadratic reciprocity holds for irreducible polynomials whose coefficients are in a number field. The method is based on Gauss’s second proof of classical quadratic reciprocity using binary quadratic forms. \nhttps://tu-darmstadt.zoom.us/j/68048280736
URL:https://crc326gaus.de/event/tba-101/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240514T160000
DTEND;TZID=Europe/Berlin:20240514T170000
DTSTAMP:20260531T103854
CREATED:20240429T083153Z
LAST-MODIFIED:20240506T091305Z
UID:8315-1715702400-1715706000@crc326gaus.de
SUMMARY:Gan-Gross-Prasad cycles and derivatives of p-adic L-functions
DESCRIPTION:International Seminar on Automorphic Forms \nDaniel Disegni (Aix-Marseille University) \nCertain Rankin-Selberg motives of rank n(n+1) are endowed with algebraic cycles arising from maps of unitary Shimura varieties. Gan-Gross-Prasad conjectured that these cycles are analogous to Heegner points\, in the sense that their nontriviality should be detected by derivatives of L-functions.\nI will propose another nontriviality criterion\, based on p-adic L-functions. Under some local conditions\, this variant can be established in a refined quantitative form\, via the construction and comparison two p-adic relative-trace formulas. (Joint work with Wei Zhang.) \nhttps://tu-darmstadt.zoom.us/j/68048280736
URL:https://crc326gaus.de/event/tba-102/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240517T133000
DTEND;TZID=Europe/Berlin:20240517T150000
DTSTAMP:20260531T103854
CREATED:20240430T141407Z
LAST-MODIFIED:20240430T141407Z
UID:8391-1715952600-1715958000@crc326gaus.de
SUMMARY:Density of rational points near manifolds
DESCRIPTION:Damaris Schindler (Universität Göttingen) \nGiven a bounded submanifold M in R^n\, how many rational points with common bounded denominator are there in a small thickening of M? Under what conditions can we count them asymptotically as the size of the denominator goes to infinity? I will discuss some recent work in this direction and arithmetic applications such as Serre’s dimension growth conjecture as well as applications in Diophantine approximation. For this I’ll focus on joint work with Shuntaro Yamagishi\, as well as joint work with Rajula Srivastava and Niclas Technau.
URL:https://crc326gaus.de/event/density-of-rational-points-near-manifolds/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240517T153000
DTEND;TZID=Europe/Berlin:20240517T170000
DTSTAMP:20260531T103854
CREATED:20240405T092314Z
LAST-MODIFIED:20240430T062929Z
UID:8077-1715959800-1715965200@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Nathan Tiggemann (TU Darmstadt) \nZoom 635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-3/
LOCATION:Darmstadt\, Room 401 and Zoom\, Schlossgartenstraße 7\, Darmstadt\, 64289\, Germany
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Sabrina Pauli":MAILTO:pauli@mathematik.tu-darmstadt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240521T080000
DTEND;TZID=Europe/Berlin:20240521T170000
DTSTAMP:20260531T103854
CREATED:20240429T084357Z
LAST-MODIFIED:20240514T125556Z
UID:8321-1716278400-1716310800@crc326gaus.de
SUMMARY:Chowla-Selberg phenomenon over function fields
DESCRIPTION:International Seminar on Automorphic Forms \nFu-Tsun Wei (National Tsing Hua University) \nIn this talk\, I will first determine the algebraic relations among various special gamma values over function fields. The result is based on the intrinsic relations between gamma values in question and periods of CM dual t-motives\, which are interpreted in terms of their “distributions”. This enables us to express every “abelian” CM period by a suitable product of special gamma values (up to an algebraic multiple)\, and derive a Chowla–Selberg-type formula in the function field case. \nhttps://tu-darmstadt.zoom.us/j/68048280736
URL:https://crc326gaus.de/event/tba-103/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Claire Burrin":MAILTO:claire.burrin@math.uzh.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240522T160000
DTEND;TZID=Europe/Berlin:20240522T173000
DTSTAMP:20260531T103854
CREATED:20240310T103419Z
LAST-MODIFIED:20240517T080211Z
UID:7883-1716393600-1716399000@crc326gaus.de
SUMMARY:Algebraic geometry of the classical Yang-Baxter equation
DESCRIPTION:Oberseminar Algebra und Geometrie \nIgor Burban  (Universität Paderborn) \nAbstract: \nClassical Yang-Baxter equation (CYBE) plays an important role in the modern theory of integrable systems. In a seminal work of Belavin and Drinfeld from the year 1983 it was proven that solutions of CYBE can have one of the following three types: elliptic\, trigonometric or rational. Moreover\, Belavin and Drinfeld gave a complete classification of all elliptic and trigonometric solutions. \nIn my talk\, I am going to explain a geometric description of solutions of (CYBE). Namely\, starting with any geometric datum (E\, A)\, where E is a Weierstraß cubic curve and A a torsion free sheaf of Lie algebras (whose generic fiber is a given complex simple Lie algebra) with vanishing cohomology\, one can associate to it in a canonical way a solution of CYBE. It turns out that all solutions of CYBE arise in this way. Moreover\, the type of the curve in the datum (E\, A) (i.e. smooth/nodal/cuspidal) determines the type of the corresponding solution of CYBE (i.e elliptic/trigonometric/rational).\nThe developed method will be illustrated by explicit examples. This talk is based on my joint works with Raschid Abedin\, Lennart Galinat and Thilo Henrich.
URL:https://crc326gaus.de/event/tba-copy-3/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240524T153000
DTEND;TZID=Europe/Berlin:20240524T170000
DTSTAMP:20260531T103854
CREATED:20240508T110014Z
LAST-MODIFIED:20240508T110014Z
UID:8530-1716564600-1716570000@crc326gaus.de
SUMMARY:Seminar on arithemtic geometry
DESCRIPTION:Torsten Wedhorn (TU Darmstadt): Moduli of truncated shtukas \nZoom 635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithemtic-geometry/
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:20240528T160000
DTEND;TZID=Europe/Berlin:20240528T170000
DTSTAMP:20260531T103854
CREATED:20240515T075300Z
LAST-MODIFIED:20240516T130920Z
UID:8608-1716912000-1716915600@crc326gaus.de
SUMMARY:The rhizomic topology and tropical abelian varieties
DESCRIPTION:Leo Herr (Universität Leiden) \nAbstract:\nThe log etale topology is a natural analogue of the etale topology for log schemes. Unfortunately\, very few things satisfy log etale descent — not even vector bundles or the structure sheaf. We introduce a new rhizomic topology that sits in between the usual and log etale topologies and show most things do satisfy rhizomic descent! As a case study\, we look at tropical abelian varieties and give some exotic examples.
URL:https://crc326gaus.de/event/leo-herr-universitat-leiden/
LOCATION:Frankfurt\, RM-Str. 6-8\, R. 308
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240531T133000
DTEND;TZID=Europe/Berlin:20240531T150000
DTSTAMP:20260531T103854
CREATED:20240524T134332Z
LAST-MODIFIED:20240524T134459Z
UID:8711-1717162200-1717167600@crc326gaus.de
SUMMARY:Isotropic motivic categories
DESCRIPTION:Fabio Tanania (TU Darmstadt) \nIn this talk\, I will introduce the isotropic stable motivic homotopy category\, which is a stable homotopic version of Vishik’s category of isotropic motives. These are local versions of the classical motivic categories SH(k) and DM(k)\, obtained roughly speaking by annihilating motives of anisotropic varieties. When the base field k is flexible\, then isotropic motivic categories have a lot of remarkable properties. As an example\, I will describe the structure of cellular isotropic spectra in terms of well-known objects coming from classical homotopy theory. Then\, I will discuss what is known about the non-cellular part of isotropic motivic categories and state some open questions.
URL:https://crc326gaus.de/event/isotropic-motivic-categories/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240531T153000
DTEND;TZID=Europe/Berlin:20240531T170000
DTSTAMP:20260531T103854
CREATED:20240405T092453Z
LAST-MODIFIED:20240514T125212Z
UID:8079-1717169400-1717174800@crc326gaus.de
SUMMARY:Seminar on Arithmetic Geometry
DESCRIPTION:Rizacan Ciloglu (TU Darmstadt): Perverse sheaves on twisted affine flag varieties \nZoom 635 7328 0984\, Kenncode: kleinste sechsstellige Primzahl
URL:https://crc326gaus.de/event/seminar-on-arithmetic-geometry-4/
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
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