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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220223T160000
DTEND;TZID=Europe/Berlin:20220223T170000
DTSTAMP:20260404T083544
CREATED:20220209T080916Z
LAST-MODIFIED:20220214T103253Z
UID:2269-1645632000-1645635600@crc326gaus.de
SUMMARY:Vertex gluings and Demazure products
DESCRIPTION:Oberseminar Algebra und Geometrie \nNathan Pflueger (Amherst College) \nAbstract:\nFinite graphs and metric graphs provide useful combinatorial analogs of algebraic curves. Since the work of Cools-Draisma-Payne Robeva\, it has been known that chains of loops are particularly useful graphs in this regard. I will describe a new perspective on these chains of loops\, by describing a version of Brill-Noether theory for curves or graphs with two marked points. Divisors on twice-marked graphs are associated with permutations; the extent to which a divisor is special is measured by the inversions of the permutation. This twice-marked Brill-Noether theory is well-suited to inductive arguments; when two twice-marked graphs are glued together\, permutations are combined by an operation called the Demazure product. I will describe how this framework provides a short proof of some of the results of Cools-Draisma-Payne Robeva\, as well as more recent results on tropical Hurwitz-Brill-Noether theory\, and may provide a route to identifying new classes of Brill-Noether-General graphs.
URL:https://crc326gaus.de/event/tba/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220218T163000
DTEND;TZID=Europe/Berlin:20220218T173000
DTSTAMP:20260404T083544
CREATED:20220210T105232Z
LAST-MODIFIED:20220601T070739Z
UID:2277-1645201800-1645205400@crc326gaus.de
SUMMARY:The S_n action on the homology groups of M_{0\,n}-bar
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (Second meeting) \nRohini Ramadas (University of Warwick) \nAbstract:\nThe symmetric group on n letters acts on M_{0\,n}-bar\, and thus on its (co-)homology groups. The induced actions on (co-)homology have been studied by\, eg.\, Getzler\, Bergstrom-Minabe\, Castravet-Tevelev. We ask: does H_{2k}(M_{0\,n}-bar) admit an equivariant basis\, i.e. one that is permuted by S_n? We describe progress towards answering this question. This talk includes joint work with Rob Silversmith.
URL:https://crc326gaus.de/event/tgiz-seminar-tropical-geometry-in-zoom-4/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220218T151500
DTEND;TZID=Europe/Berlin:20220218T161500
DTSTAMP:20260404T083544
CREATED:20220210T104154Z
LAST-MODIFIED:20220601T070641Z
UID:2275-1645197300-1645200900@crc326gaus.de
SUMMARY:Cut-and-paste invariants of moduli spaces of relative stable maps to P^1
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (Second meeting) \nSiddarth Kannan (Brown University) \nAbstract:\nI will discuss ongoing work studying moduli spaces of genus zero stable maps to P^1\, with fixed ramification profiles over 0 and infinity. I will describe a chamber decomposition of the space of ramification data such that the Grothendieck class of the moduli space is constant on the chambers. Finally\, for the sequence of ramification data corresponding to maximal ramification over 0 and no ramification over infinity\, I will describe a recursive algorithm to compute the generating function for Euler characteristics of these spaces.
URL:https://crc326gaus.de/event/tgiz-seminar-tropical-geometry-in-zoom-3/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220218T140000
DTEND;TZID=Europe/Berlin:20220218T150000
DTSTAMP:20260404T083544
CREATED:20220210T084302Z
LAST-MODIFIED:20220601T070540Z
UID:2273-1645192800-1645196400@crc326gaus.de
SUMMARY:Patchworks of real algebraic varieties in higher codimension
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (Second meeting) \nJohannes Rau (Universidad de los Andes) \nAbstract:\nI will present a combinatorial setup\, based on smooth tropical varieties and real phase structures\, which after “unfolding” produces a certain class of PL-manifolds (called patchworks). We have two motivations in mind: Firstly\, in the spirit of Viro’s combinatorial patchwoking for hypersurfaces\, these patchworks can be used to describe the topology of real algebraic varieties close to the tropical limit. Secondly\, even if not “realisable” by real algebraic varieties\, real phase structures provide a geometric framework for combinatorial structures such as oriented matroids. Joint work with Arthur Renaudineau and Kris Shaw.
URL:https://crc326gaus.de/event/tgiz-seminar-tropical-geometry-in-zoom-2/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220217T150000
DTEND;TZID=Europe/Berlin:20220217T180000
DTSTAMP:20260404T083544
CREATED:20211027T143742Z
LAST-MODIFIED:20220201T130616Z
UID:1829-1645110000-1645120800@crc326gaus.de
SUMMARY:Hodge theory of matroids (Session 7)
DESCRIPTION:This semester’s topic in our joint research seminar is Hodge theory of matroids. The meetings take place on Zoom on a bi-weekly basis during lecture time\, Thursdays 15-18.\nLast meeting: Discussion of topics for the next seminar
URL:https://crc326gaus.de/event/hodge-theory-of-matroids-session-7/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220216T160000
DTEND;TZID=Europe/Berlin:20220216T170000
DTSTAMP:20260404T083544
CREATED:20211213T135755Z
LAST-MODIFIED:20220208T071527Z
UID:2130-1645027200-1645030800@crc326gaus.de
SUMMARY:Dissipation of Correlations of Automorphic Forms
DESCRIPTION:Oberseminar Algebra und Geometrie \nPetru Constantinescu (MPIM Bonn) \nAbstract:\nMass equidistribution of eigenfunctions is a central topic in quantum chaos and number theory. In this talk we highlight a generalisation of the Quantum Unique Ergodicity for holomorphic cusp forms in the weight aspect. We show that correlations of masses coming from off-diagonal terms dissipate as the weight tends to infinity. This corresponds to classifying the possible quantum limits along any sequence of Hecke eigenforms of increasing weight.
URL:https://crc326gaus.de/event/petru-constantinescu/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220216T093000
DTEND;TZID=Europe/Berlin:20220216T110000
DTSTAMP:20260404T083544
CREATED:20211102T152003Z
LAST-MODIFIED:20211124T140340Z
UID:1880-1645003800-1645009200@crc326gaus.de
SUMMARY:Suslin homology
DESCRIPTION:Katharina Hübner
URL:https://crc326gaus.de/event/suslin-homology/
LOCATION:Heidelberg\, MATHEMATIKON\, SR 4\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220211T133000
DTEND;TZID=Europe/Berlin:20220211T150000
DTSTAMP:20260404T083544
CREATED:20220120T092051Z
LAST-MODIFIED:20220208T091819Z
UID:2162-1644586200-1644591600@crc326gaus.de
SUMMARY:A Main Conjecture in non-commutative Iwasawa theory
DESCRIPTION:
URL:https://crc326gaus.de/event/antonio-mejias-gil-a-main-conjecture-in-non-commutative-iwasawa-theory/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220209T160000
DTEND;TZID=Europe/Berlin:20220209T170000
DTSTAMP:20260404T083544
CREATED:20211209T152823Z
LAST-MODIFIED:20220207T102947Z
UID:2126-1644422400-1644426000@crc326gaus.de
SUMMARY:Graph potentials\, TQFTs and mirror partners
DESCRIPTION:Oberseminar Algebra und Geometrie \nTalk by Pieter Belmans (Université du Luxembourg) \nGraph potentials\, TQFTs and mirror partners \nAbstract: In a joint work with Sergey Galkin and Swarnava Mukhopadhyay we introduced a class of Laurent polynomials associated to decorated trivalent graphs which we called graph potentials. These Laurent polynomials satisfy interesting symmetry and compatibility properties\, leading to the construction of a topological quantum field theory which efficiently computes the classical periods as the partition function. \nUnder mirror symmetry graph potentials are related to moduli spaces of rank 2 bundles (with fixed determinant of odd degree) on a curve of genus $g\geq 2$\, which is a class of Fano varieties of dimension $3g-3$. I will discuss how enumerative mirror symmetry relates classical periods to quantum periods in this setting. Time permitting I will touch upon aspects of homological mirror symmetry for these Fano varieties and their mirror partners.
URL:https://crc326gaus.de/event/pieter-belmans/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220209T093000
DTEND;TZID=Europe/Berlin:20220209T110000
DTSTAMP:20260404T083544
CREATED:20211102T151915Z
LAST-MODIFIED:20211124T140318Z
UID:1878-1644399000-1644404400@crc326gaus.de
SUMMARY:Comparison with Čech cohomology\, adic version (Part 2)
DESCRIPTION:Christian Dahlhausen
URL:https://crc326gaus.de/event/comparison-with-cech-cohomology-adic-version-part-2/
LOCATION:Heidelberg\, MATHEMATIKON\, SR 4\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220204T133000
DTEND;TZID=Europe/Berlin:20220204T150000
DTSTAMP:20260404T083544
CREATED:20220120T091654Z
LAST-MODIFIED:20220208T085632Z
UID:2160-1643981400-1643986800@crc326gaus.de
SUMMARY:Numerical experiments with plectic Darmon points (online)
DESCRIPTION:
URL:https://crc326gaus.de/event/dr-marc-masdeu-numerical-experiments-with-plectic-darmon-points-online/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Peter Gr%C3%A4f":MAILTO:peter.graef iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220203T150000
DTEND;TZID=Europe/Berlin:20220203T180000
DTSTAMP:20260404T083544
CREATED:20211027T142956Z
LAST-MODIFIED:20220201T144412Z
UID:1826-1643900400-1643911200@crc326gaus.de
SUMMARY:Hodge theory of matroids (Session 6) / CRC-Colloquium
DESCRIPTION:This semester’s topic in our joint research seminar is Hodge theory of matroids. The meetings take place on Zoom on a bi-weekly basis during lecture time\, Thursdays 15-18. \nTalk 11: June Huh (Princeton University): Kazhdan-Lusztig and singular Hodge theory for matroids \nAbstract: There is a remarkable parallel between the theory of Coxeter groups (think of the symmetric group or the dihedral group) and matroids (think of your favorite graph or vector configuration). After giving an overview of the similarity\, I will report proofs of two combinatorial conjectures\, the nonnegativity conjecture for Kazhdan-Lusztig coefficients and the top-heavy conjecture for the number of flats of matroids. The key step is to formulate and prove an analogue of the decomposition theorem for a resolution of singularities in a combinatorial setup\, which is closely related to the validity of the hard Lefschetz theorem and the Hodge-Riemann relations for what would be an intersection Chow cohomology in realizable cases. The talk should be enjoyable without specialized knowledge. Joint work with Tom Braden\, Jacob Matherne\, Nick Proudfoot\, and Botong Wang.
URL:https://crc326gaus.de/event/hodge-theory-of-matroids-session-6/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220202T160000
DTEND;TZID=Europe/Berlin:20220202T170000
DTSTAMP:20260404T083544
CREATED:20211209T152151Z
LAST-MODIFIED:20220201T123948Z
UID:2124-1643817600-1643821200@crc326gaus.de
SUMMARY:Christin Bibby: A generating function approach to new representation stability phenomena in orbit configuration spaces
DESCRIPTION:Oberseminar Algebra und Geometrie \nTalk by Christin Bibby (Louisiana State University) \nA generating function approach to new representation stability phenomena in orbit configuration spaces \nAbstract: As countless examples show\, it can be fruitful to study a sequence of complicated objects all at once via the formalism of generating functions. We apply this point of view to the homology and combinatorics of orbit configuration spaces: using the notion of twisted commutative algebras\, which essentially categorify exponential generating functions. This idea allows for a factorization of the orbit configuration space “generating function” into an infinite product\, whose terms are surprisingly easy to understand. Beyond the intrinsic aesthetic of this decomposition and its quantitative consequences\, it reveals a sequence of primary\, secondary\, and higher representation stability phenomena. This is joint work with Nir Gadish.
URL:https://crc326gaus.de/event/christin-bibby/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220202T093000
DTEND;TZID=Europe/Berlin:20220202T110000
DTSTAMP:20260404T083544
CREATED:20211102T151820Z
LAST-MODIFIED:20211124T140249Z
UID:1876-1643794200-1643799600@crc326gaus.de
SUMMARY:Comparison with Čech cohomology\, adic version (Part 1)
DESCRIPTION:Christian Dahlhausen
URL:https://crc326gaus.de/event/comparison-with-cech-cohomology-adic-version-part-1/
LOCATION:Heidelberg\, MATHEMATIKON\, SR 4\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220126T160000
DTEND;TZID=Europe/Berlin:20220126T170000
DTSTAMP:20260404T083544
CREATED:20211209T151241Z
LAST-MODIFIED:20220119T101141Z
UID:2120-1643212800-1643216400@crc326gaus.de
SUMMARY:Tyler Kelly: An Open Enumerative Theory for Landau-Ginzburg models.
DESCRIPTION:Oberseminar Algebra und Geometrie \nTalk by Tyler Kelly (Birmingham) \nAn Open Enumerative Theory for Landau-Ginzburg models. \nAbstract: Landau-Ginzburg models consist of a pair (W\, G) where W is a potential (that is\, a complex valued regular function from a quasi-affine variety X) and G is a group acting on X so that W is invariant. In the context of mirror symmetry\, oftentimes they can be viewed as a noncommutative symplectic deformation of a symplectic manifold. Over the past couple of decades there has been work in establishing an enumerative theory for a Landau-Ginzburg model\, akin to Gromov-Witten theory. Recently\, a few of us have aimed to create an open enumerative theory for Landau-Ginzburg models. In the end\, we can construct the mirror Landau-Ginzburg model’s potential function as a generating function of open enumerative invariants. This provides the Landau-Ginzburg analogue to Maslov index two discs / tropical discs for a symplectic manifold. This is joint work with Mark Gross and Ran Tessler.
URL:https://crc326gaus.de/event/tyler-kelly/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220126T093000
DTEND;TZID=Europe/Berlin:20220126T110000
DTSTAMP:20260404T083544
CREATED:20211102T151651Z
LAST-MODIFIED:20211124T140219Z
UID:1874-1643189400-1643194800@crc326gaus.de
SUMMARY:Joins of Henselian Huber pairs (Part 2)
DESCRIPTION:M. Amine Koubaa
URL:https://crc326gaus.de/event/joins-of-henselian-huber-pairs-part-2/
LOCATION:Heidelberg\, MATHEMATIKON\, SR 4\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220121T163000
DTEND;TZID=Europe/Berlin:20220121T173000
DTSTAMP:20260404T083544
CREATED:20220601T072315Z
LAST-MODIFIED:20220601T072315Z
UID:3089-1642782600-1642786200@crc326gaus.de
SUMMARY:Uniform bounds for torsion packets on tropical curves
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (First meeting Winter Semester 2021/22) \nHarry Richman (University of Washington) \nAbstract:\nSay two points x\, y on an algebraic curve are in the same torsion packet if [x – y] is a torsion element of the Jacobian. In genus 0 and 1\, torsion packets have infinitely many points. In higher genus\, a theorem of Raynaud states that all torsion packets are finite. It was long conjectured\, and only recently proven*\, that the size of a torsion packet is bounded uniformly in terms of the genus of the underlying curve. We study the tropical analogue of this construction for a metric graph. On a higher genus metric graph\, torsion packets are not always finite\, but they are finite under an additional “genericity” assumption on the edge lengths. Under this genericity assumption\, the torsion packets satisfy a uniform bound in terms of the genus of the underlying graph. (*by Kuehne and Looper-Silverman-Wilmes in 2021)
URL:https://crc326gaus.de/event/uniform-bounds-for-torsion-packets-on-tropical-curves/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220121T151500
DTEND;TZID=Europe/Berlin:20220121T161500
DTSTAMP:20260404T083544
CREATED:20220124T103418Z
LAST-MODIFIED:20220601T072402Z
UID:2198-1642778100-1642781700@crc326gaus.de
SUMMARY:Applications of tropical geometry to irreducibility problems in algebraic geometry
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (First meeting Winter Semester 2021/22) \n15:15-16:15 Ilya Tyomkin (Ben Gurion University) \nAbstract:\nIn my talk\, I will discuss a novel tropical approach to classical irreducibility problems of Severi varieties and of Hurwitz schemes. I will explain how to prove such irreducibility results by investigating the properties of tropicalizations of one-parameter families of curves and of the induced maps to the tropical moduli space of parametrized tropical curves. The talk is based on a series of joint works with Karl Christ and Xiang He.
URL:https://crc326gaus.de/event/tgiz-seminar-tropical-geometry-in-zoom/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220121T140000
DTEND;TZID=Europe/Berlin:20220121T150000
DTSTAMP:20260404T083544
CREATED:20220601T071512Z
LAST-MODIFIED:20220601T072015Z
UID:3090-1642773600-1642777200@crc326gaus.de
SUMMARY:Orders and polytropes: matrices from valuations
DESCRIPTION:TGiZ-Seminar: Tropical geometry in Zoom (First meeting Winter Semester 2021/22) \n14:00-15:00 Mima Stanojkovski (RWTH Aachen) \nAbstract:\nLet K be a discretely valued field with ring of integers R. To a d-by-d matrix M with integral coefficients one can associate an R-module\, in K^{d x d}\, and a polytope\, in the Euclidean space of dimension d-1. We will look at the interplay between these two objects\, from the point of view of tropical geometry and building on work of Plesken and Zassenhaus. This is joint work with Y. El Maazouz\, M. A. Hahn\, G. Nebe\, and B. Sturmfels. \n 
URL:https://crc326gaus.de/event/orders-and-polytropes-matrices-from-valuations/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220121T133000
DTEND;TZID=Europe/Berlin:20220121T150000
DTSTAMP:20260404T083544
CREATED:20211216T093503Z
LAST-MODIFIED:20220208T085247Z
UID:2132-1642771800-1642777200@crc326gaus.de
SUMMARY:Higher Hida theory and p-adic L-functions for Hilbert modular forms
DESCRIPTION:
URL:https://crc326gaus.de/event/dr-giada-grossi-higher-hida-theory-and-p-adic-l-functions-for-hilbert-modular-forms/
LOCATION:Heidelberg\, Mathematikon\, SR A and Livestream
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Peter Gr%C3%A4f":MAILTO:peter.graef iwr.uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220120T150000
DTEND;TZID=Europe/Berlin:20220120T180000
DTSTAMP:20260404T083544
CREATED:20211027T142210Z
LAST-MODIFIED:20220201T130853Z
UID:1824-1642690800-1642701600@crc326gaus.de
SUMMARY:Hodge theory of matroids (Session 5)
DESCRIPTION:This semester’s topic in our joint research seminar is Hodge theory of matroids. The meetings take place on Zoom on a bi-weekly basis during lecture time\, Thursdays 15-18.\nTalk 9: Bergman fans and the permutohedral variety (Stefan Rettenmayr)\nTalk 10: Intersection theory on the permutohedral variety (Andreas Gross)
URL:https://crc326gaus.de/event/hodge-theory-of-matroids-session-5/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220119T093000
DTEND;TZID=Europe/Berlin:20220119T110000
DTSTAMP:20260404T083544
CREATED:20211102T151554Z
LAST-MODIFIED:20211124T140148Z
UID:1872-1642584600-1642590000@crc326gaus.de
SUMMARY:Joins of Henselian Huber pairs (Part 1)
DESCRIPTION:M. Amine Koubaa
URL:https://crc326gaus.de/event/joins-of-henselian-huber-pairs-part-1/
LOCATION:Heidelberg\, MATHEMATIKON\, SR 4\, INF 205\, Heidelberg\, Germany
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220114T133000
DTEND;TZID=Europe/Berlin:20220114T150000
DTSTAMP:20260404T083544
CREATED:20211130T091839Z
LAST-MODIFIED:20220208T090213Z
UID:2032-1642167000-1642172400@crc326gaus.de
SUMMARY:Topological Hochschild homology and Zeta-values
DESCRIPTION:
URL:https://crc326gaus.de/event/dr-baptiste-morin-tba/
CATEGORIES:GAUS-Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220112T160000
DTEND;TZID=Europe/Berlin:20220112T170000
DTSTAMP:20260404T083544
CREATED:20211209T150022Z
LAST-MODIFIED:20220201T130829Z
UID:2114-1642003200-1642006800@crc326gaus.de
SUMMARY:Oishee Banerjee: Filtration of cohomology via symmetric (semi-)simplicial spaces
DESCRIPTION:Oberseminar Algebra und Geometrie \nTalk by Oishee Banerjee (University of Bonn) \nFiltration of cohomology via symmetric (semi-)simplicial spaces \nAbstract: Inspired by Deligne’s use of the simplicial theory of hypercoverings in defining mixed Hodge structures we replace the indexing category ∆ by the symmetric simplicial category ∆S and study (a class of) ∆S-hypercoverings\, which we call spaces admitting symmetric (semi)simplicial filtration. For ∆S-hypercoverings we construct a spectral sequence\, somewhat like the Cˇech-to-derived category spectral sequence. The advantage of working on ∆S is that all of the combinatorial com- plexities that come with working on ∆ are bypassed\, giving simpler\, unified proof of known results like the computation of (in some cases\, stable) singular cohomol- ogy (with rational coefficients) and étale cohomology (with Q_l coefficients) of the moduli space of degree n maps C to a projective space \, C a smooth projective curve of genus g\, of unordered configuration spaces\, that of the moduli space of smooth sections of a fixed gdr that is m-very ample etc.
URL:https://crc326gaus.de/event/oishee-banerjee/
LOCATION:Frankfurt and Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Annette Werner":MAILTO:werner[at]math.uni-frankfurt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220112T093000
DTEND;TZID=Europe/Berlin:20220112T110000
DTSTAMP:20260404T083544
CREATED:20211102T151437Z
LAST-MODIFIED:20211124T140105Z
UID:1870-1641979800-1641985200@crc326gaus.de
SUMMARY:Comparison with étale cohomology and finiteness in dimension
DESCRIPTION:Christian Dahlhausen
URL:https://crc326gaus.de/event/comparison-with-etale-cohomology-and-finiteness-in-dimension/
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20211217T133000
DTEND;TZID=Europe/Berlin:20211217T150000
DTSTAMP:20260404T083544
CREATED:20211130T091418Z
LAST-MODIFIED:20220208T090650Z
UID:2030-1639747800-1639753200@crc326gaus.de
SUMMARY:Extending exodromy
DESCRIPTION:
URL:https://crc326gaus.de/event/sebastian-wolf-tba/
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:20211215T093000
DTEND;TZID=Europe/Berlin:20211215T110000
DTSTAMP:20260404T083544
CREATED:20211102T151206Z
LAST-MODIFIED:20211124T135917Z
UID:1868-1639560600-1639566000@crc326gaus.de
SUMMARY:Comparison with Čech cohomology\, algebraic version (Part 2)
DESCRIPTION:Marius Leonhardt
URL:https://crc326gaus.de/event/comparison-with-cech-cohomology-algebraic-version-part-2/
CATEGORIES:GAUS-AG
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20211210T140000
DTEND;TZID=Europe/Berlin:20211210T173000
DTSTAMP:20260404T083544
CREATED:20211209T134555Z
LAST-MODIFIED:20211209T134555Z
UID:2108-1639144800-1639157400@crc326gaus.de
SUMMARY:Non-Archimedean and tropical geometry
DESCRIPTION:14:00-15:00 Claudia Fevola (Max Planck Institute Leipzig)\nKp Solitons from Tropical Limits \n15:15-16:15 David Holmes (Leiden University)\nPiecewise polynomials and intersection theory \n16:30-17:30 Dimitri Wyss (École Polytechnique Fédérale de Lausanne)\nDT-invariants from non-archimedean integrals
URL:https://crc326gaus.de/event/non-archimedean-and-tropical-geometry/
LOCATION:Zoom
CATEGORIES:GAUS-Seminar
ORGANIZER;CN="Annette Werner":MAILTO:werner[at]math.uni-frankfurt.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20211210T133000
DTEND;TZID=Europe/Berlin:20211210T150000
DTSTAMP:20260404T083544
CREATED:20211130T091101Z
LAST-MODIFIED:20220208T090925Z
UID:2028-1639143000-1639148400@crc326gaus.de
SUMMARY:Towards integral p-adic cohomology theories for open and singular varieties
DESCRIPTION:
URL:https://crc326gaus.de/event/dr-johannes-sprang-integral-p-adic-cohomology-for-open-and-singular-varieties/
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:20211209T150000
DTEND;TZID=Europe/Berlin:20211209T180000
DTSTAMP:20260404T083544
CREATED:20211027T141410Z
LAST-MODIFIED:20211027T141410Z
UID:1820-1639062000-1639072800@crc326gaus.de
SUMMARY:Hodge theory of matroids (Session 4)
DESCRIPTION:This semester’s topic in our joint research seminar is Hodge theory of matroids. The meetings take place on Zoom on a bi-weekly basis during lecture time\, Thursdays 15-18.\nTalk 7: A crash course on toric varieties (Felix Goebler)\nTalk 8: Minkowski weights and the Chow ring of a toric variety (Luca Battistella)
URL:https://crc326gaus.de/event/hodge-theory-of-matroids-session-4/
LOCATION:Zoom
CATEGORIES:GAUS-AG
END:VEVENT
END:VCALENDAR