Geometry and Topology Seminar

The Geometry and Topology Seminar at the University of Haifa meets every two weeks, with talks on a wide range of topics in algebraic, geometric, differential, and symplectic topology, and in differential and algebraic geometry, broadly understood.

The seminar takes place on Wednesday 12:10 in room 614 (tentative). For more information please contact the seminar organizer, Frol Zapolsky.

U. Haifa Topology & Geometry seminar: Sunday, May 15, 2022. Speaker: Victoriya Ozornova (Bonn). Title: “Complicial Sets”.

Author: raphy May 15, 2022

Time: 17:00 (Israel Time) Location: On Zoom Abstract. The goal of this talk is to report on the progress in the program of comparing the model of $(\infty,n)$-categories given by complicial sets with the more established models, in particular with…
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Sunday, May 8, 2022. Speaker: Sourav Das (Haifa). Title: “Title: Higgs bundles on nodal curves”.

Author: raphy May 6, 2022

Time: 17:00 (Israel Time) Location: On Zoom Recording: https://us02web.zoom.us/rec/share/u3nIzULAEKHfZe3iCm0KZxftqdZ0Pzcjd0EGV3ipl6eZ_I_IOGMzzsCYk42k5sXJ.8zyeCrlu8P3ySdxb Abstract. In I987 Nigel Hitchin proved that the moduli space of Higgs bundles on a smooth projective curve (of genus greater than equal to 2) has a natural symplectic structure. In…
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Sunday, May 1, 2022. Speaker: Dimitri Ara (Marseilles). Title: “Comparison of three nerve functors for strict n-categories”.

Author: raphy April 28, 2022

Time: 17:00 (Israel Time) Location: On Zoom Abstract: The nerve functor from categories to simplicial sets allows to associate toany small category a homotopy type giving rise to a homotopy theory of smallcategories studied by Quillen, Thomason and Grothendieck. To…
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Sunday, Apr. 24, 2022. Speaker: Surojit Ghosh (IIT Roorkee). Title: “Slice Filtration of E”.

Author: raphy April 24, 2022

Time: 17:00 (Israel Time) Location: On Zoom Recording: https://us02web.zoom.us/rec/share/hgnju1bKL_ueL3VYdTVbsd1yvB737rHJxu7HK2UyAien-F4CgUYMa2iWYxL_7sHL.Yn8cQ8p8qmFdUK0e Abstract. The slice filtration is an equivariant analogue of the Postnikov tower and it is modeled on Voevodsky’s motivic filtration. I will begin by recalling the definition of slice filtration along…
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Geometry and Topology Seminar

U. Haifa Topology & Geometry seminar: Sunday, Apr. 10, 2022. Speaker: Niles Johnson (Ohio State University). Title: “Graded Picard categories and the 2-type of the sphere”.

Author: raphy April 6, 2022

Time: 17:00 (Israel Time) Location: On Zoom Recording: https://us02web.zoom.us/rec/share/c93WMCqjj3eUShqHmo0pAyvcVQsJCDKMfFflNdJvj3NjjXnwH6rndDkFT1J8YBFJ.wkT8MPwk-Dl_yovw Slides: https://nilesjohnson.net/notes/grPic-P2S.pdf Abstract: The Stable Homotopy Hypothesis connects symmetric monoidalalgebra and stable homotopy theory. In a classical special case, thethe tensor product of graded abelian groups leads to a model for…
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Sunday, Apr. 3, 2022. Speaker: Sanjeevi Krishnan (Ohio State University). Title: “A Kan Condition for Directed Homotopy”.

Author: raphy April 1, 2022

Time: 17:00 (Israel Time) Location: On Zoom Abstract.The Kan condition guarantees that a simplicial set, a formal colimit of abstract simplices, models enough features of a topological space so that classical homotopy theory can be given a completely combinatorial description. …
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Sunday, Mar. 27, 2022. Speaker: Oren Ben-Bassat (Haifa). Title: “Derived Analytic Geometry”.

Author: raphy March 26, 2022

Time: 17:15 Location: On Zoom and in Room 614 Haifa University Mathematics and Science Building Abstract: I will start by reviewing some work of others: sketching a (higher) categorical approach to geometry. After that, I will explain how using this…
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Sunday, Mar. 20, 2022. Speaker: Andy Tonks (Malaga). Title: “On some generalisations of Baues-Wirsching cohomology”.

Author: raphy March 17, 2022

Time: 17:00 Location: On Zoom and in Room 614 Haifa University Mathematics and Science Building Abstract: I will talk about the cohomology of small categories, introduced by Baues and Wirsching in 1985, and more recently discovered connections to a number…
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Sunday, Mar. 13, 2022. Speaker: Michael Farber (Queen Mary). Title: “Topological Complexity of Spherical Bundles”

Author: raphy March 10, 2022

Time: Sunday March 13 17:00 Location: On Zoom and in Room 614 Haifa University Mathematics and Science Building Abstract: I will start by describing the concept of a parametrized motion planning algorithm which allows to achieve high degree of flexibility…
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Sunday, Mar. 6, 2022. Speaker: Greg Arone (University of Stockholm). “Title: Ext in the category of functors from Groups to abelian groups”

Author: raphy March 7, 2022

Time: 17:00 (Israel Time) Location: Room 614, Science & Education Building, University of Haifa and on Zoom (see below) https://us02web.zoom.us/rec/share/jtfNDNX5RaN1GdA09LGJykGM_nVmLaHW6dcKoTu5B-yUk5bDjL64Y-nSoQoJHyDI.vjEmMP1I3vyXjJpf Abstract. We consider the category of polynomial functors from finitely generated free groups to abelian groups. Favorite examples include…
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Geometry and Topology Seminar, Seminar

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