Geometry and Topology Seminar

Time: Sunday Jan 30th, 17:00 (Israel Time) Location: On Zoom Speaker: Sanjeevi Krishnan (Ohio State University) Title: A Kan Condition for Directed Homotopy Abstract.The Kan condition guarantees that a simplicial set, a formal colimit of abstract simplices, models enough features…
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Time: Sunday Jan 16th, 16:00 (Israel Time) Location: On Zoom Speaker: Constanze Roitzheim (Kent) Title: How algebraic is a stable model category? Recording: https://us02web.zoom.us/rec/share/U3QSe8AehwtkDxuOa3c_tUrVFn2ZbHfAUbKzPdkFpM11ctz1klUclZ20C1QSPxzd.9rlLEtnAergESl5Q Abstract: There are many different notions of “being algebraic” used in stable homotopy theory. The relationships…
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Time: Sunday Jan 9, 2021, 17:00 (Israel Time) Location: On Zoom Speaker: Jerome Scherer (EPFL) Title:  Floyd’s manifold is a conjugation space. Slides: https://mathematics.haifa.ac.il/wp-content/uploads/Jerome_HaifaTopologySeminarJanuary2022.pdf Recording: https://us02web.zoom.us/rec/share/azLKTgeGE0bXGINeY_5hFcYebo_TqaJg5iUncF2quJzpdheNEOKViXb9kh0Eb13G.oSZiH6GcAjsdiC5R Abstract: This is joint work with Wolfgang Pitsch. We illustrate how equivariant stable homotopy…
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Time: Sunday Jan 2nd, 17:00 (Israel Time) Location: On Zoom Speaker: Dan Mangoubi (Hebrew University) Title: A Local version of Courant’s Nodal domain Theorem. Slides: https://mathematics.haifa.ac.il/wp-content/uploads/Haifa-University-020122-slides.pdf Abstract. Let u_k be an eigenfunction of a vibrating string (with fixed ends) corresponding…
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Time: Sunday Dec 26, 2021, 17:00 (Israel Time) Location: On Zoom Speaker: Daniel Kaner (U. Haifa) Title: Condensed mathematics. ZOOM COORDINATES: https://us02web.zoom.us/j/84987591026?pwd=aTJWcFlOSldKck5leGt2d25CYkRqZz09 Meeting ID: 849 8759 1026 Recording: https://us02web.zoom.us/rec/share/OVXg3b1h30WaEThTuyX1RTOC85Ee42zQrxdl6XzZhP_OywAe_UGYG1mlUENPznLR.ddk5ZtYnmlh5A17E A condensed set is a sheaf of sets on the category of profinite spaces (with an…
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Time: Sunday Dec 19, 17:00 (Israel Time) Location: On Zoom Speaker: Omer Bobrowski (Technion) Title: Topological Phase Transitions in Random Geometric Complexes Abstract. Connectivity and percolation are two well studied phenomena in random graphs.  In this talk we will discuss…
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Time: Sunday Dec 12, 17:00 (Israel Time) Location: On Zoom Recording: https://us02web.zoom.us/rec/share/XY3l8ev_WpQUpjD0RzE-X862TBv9ntxuNhe1PI7MSYyf3yb4JhYuMMM27v2MXFde.hYunCTG7Me2VAC6e Speaker: Kate Ponto (Kentucky) Title: Iterated Traces Abstract. The trace of a matrix does not seem like an operation that should be iterated, but if we step back…
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Time: Sunday December 5th 17:00 (Israel Time) Location: On Zoom Recording: https://us02web.zoom.us/rec/share/MjyzxaBsbY7S1RGjShKMSBcfKtgqm8STy9-_KzeHeMdz8bwJhZ-F1wJuG0QhDrUv.aa8mS84tuLDHuHHs Slides: http://categorified.net/Haifa.pdf Speaker: Theo Johnson-Freyd (Dalhousie/Perimeter Institute) Title: Algebraically Closed Higher Categories Abstract. Super Tannakian duality can be interpreted as saying that the symmetric monoidal category Vec is…
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Time: Sunday November 28th 17:00 (Israel Time) Location: On Zoom Speaker: Jereon Hekking (KTH) Title: Graded algebras, projective spectra and blow-ups in derived algebraic geometry Recording: https://us02web.zoom.us/rec/share/Cb6AhzbntZk0ipwpYjRkoAlQNTYyhGOuiY42sSP0AcoSz7i0hacCJNQrrVoqlWw.sOAp1cmjCc-0TKjv Abstract. The goal of this talk is to define the derived blow-up of…
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Time: Sunday November 21st 17:00 (Israel Time) Location: On Zoom Recording: https://us02web.zoom.us/rec/share/ARtScxOE0tfOqjHkNNFBUYhtya5XHrPsWCKXQBbEAqVIs6HooFHsRKGe0cl6EHc.Fz4o-ycGSOsZ49J- Speaker: Yoav Len (St. Andrews) Title: The Geometry of Graphs and Algebraic Curves Abstract. My talk will revolve around combinatorial aspects of algebraic curves. Via tropical geometry, problems…
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