{ "141381-21888741": { "datetime_modified":"20251102T113053", "datetime_start":"20251103T160000", "datetime_end":"20251103T170000", "has_end_time":1, "date_start":"2025-11-03", "date_end":"2025-11-03", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Applying algebraic combinatorics to biology", "occurrence_title":"", "combined_title":"Applying algebraic combinatorics to biology: Jen Akhmedova", "event_subtitle":"Jen Akhmedova", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"In this talk I plan to give a brief exposition of two combinatorial objects that are of interest to computational biologists. No biology knowledge is expected; the majority of the talk will be pure math.\r\n\r\nPart 1: Tropical Grassmannian and phylogenetic trees.\r\nThe positive tropical grassmannian Trop+Gr(2,n) can be stratified into cells labeled by trivalent trees, which produces interesting combinatorics on its own, but also turns out to be useful in epidemiologists' computations.\r\n\r\nPart 2: Boolean networks and polynomial ideals.\r\nOne of the most common applications of computational algebra is solving polynomial equations via Grobner basis computation. Certain systems can be modeled by collections of functions over finite fields, for which solving polynomial equations gives insight into ways to control the dynamics of the system.", "occurrence_notes":null, "guid":"141381-21888741@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/141381", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"3866", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Student Combinatorics Seminar - Department of Mathematics", "group_id":"4907", "website":"" }, { "group_name":"Department of Mathematics", "group_id":"3791", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21888741 } , "141388-21888748": { "datetime_modified":"20251102T224106", "datetime_start":"20251103T160000", "datetime_end":"20251103T170000", "has_end_time":1, "date_start":"2025-11-03", "date_end":"2025-11-03", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Extremal F-Pure Thresholds in Regular Local Rings", "occurrence_title":"", "combined_title":"Extremal F-Pure Thresholds in Regular Local Rings: Ben Baily", "event_subtitle":"Ben Baily", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Let (R, m) be an F-finite regular local ring of characteristic p > 0. Let I be a proper ideal of R, and let d denote the order of vanishing of I at the maximal ideal. Takagi and Watanabe showed that the F-pure threshold fpt(I) is bounded below by 1\/d; we classify pairs (R, I) for which this bound is sharp.", "occurrence_notes":null, "guid":"141388-21888748@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/141388", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"3088", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Commutative Algebra Seminar - Department of Mathematics", "group_id":"4886", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21888748 } , "136337-21878516": { "datetime_modified":"20251101T114205", "datetime_start":"20251103T160000", "datetime_end":"20251103T170000", "has_end_time":1, "date_start":"2025-11-03", "date_end":"2025-11-03", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"GLNT: Arithmetic of Fourier coefficients of Gan-Gurevich lifts on G_2", "occurrence_title":"", "combined_title":"GLNT: Arithmetic of Fourier coefficients of Gan-Gurevich lifts on G_2: Naomi Sweeting (Princeton)", "event_subtitle":"Naomi Sweeting (Princeton)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Quaternionic modular forms on G_2 carry a surprisingly rich arithmetic structure. For example, they have a theory of Fourier expansions where the Fourier coefficients are indexed by totally real cubic rings. For quaternionic modular forms on G_2 associated via functoriality with certain modular forms on PGL_2$, Gross conjectured in 2000 that their Fourier coefficients encode L-values of cubic twists of the modular form (echoing Waldspurger's work on Fourier coefficients of half-integral weight modular forms). This talk will report on recent work proving Gross's conjecture when the modular forms are dihedral, giving the first examples for which it is known. Based on joint work with Petar Bakic, Alex Horawa, and Siyan Daniel Li-Huerta.", "occurrence_notes":null, "guid":"136337-21878516@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/136337", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"4096", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Group, Lie and Number Theory Seminar - Department of Mathematics", "group_id":"4892", "website":"" }, { "group_name":"Department of Mathematics", "group_id":"3791", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21878516 } , "141352-21888670": { "datetime_modified":"20251103T112825", "datetime_start":"20251103T160000", "datetime_end":"20251103T170000", "has_end_time":1, "date_start":"2025-11-03", "date_end":"2025-11-03", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Late-time tails and nonlinear Price's law for semilinear wave equations in 3-D", "occurrence_title":"", "combined_title":"Late-time tails and nonlinear Price's law for semilinear wave equations in 3-D: Shi-Zhuo Looi (Caltech)", "event_subtitle":"Shi-Zhuo Looi (Caltech)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"I will present sharp late-time pointwise asymptotics for semilinear wave equations with power nonlinearities on stationary, asymptotically flat spacetimes (including black hole exteriors). Under standard spectral and local energy decay hypotheses for perturbations of black-hole backgrounds, we show a clean dichotomy: cubic nonlinearities generate a nonlinear t^{-2} tail with an explicit coefficient, while for powers p \\ge 4 the linear Price's law t^{-3} decay holds with a modified coefficient; in both regimes we identify the leading term throughout the forward causal domain via a blend of radiation-field methods and low-energy resolvent analysis. Joint work with Haoren Xiong.", "occurrence_notes":null, "guid":"141352-21888670@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/141352", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"EH 1866", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Seminar","Mathematics"], "website":"https:\/\/sites.google.com\/umich.edu\/isrmt-seminar\/", "sponsors":[ { "group_name":"Integrable Systems and Random Matrix Theory Seminar - Department of Mathematics", "group_id":"4893", "website":"" }, { "group_name":"Department of Mathematics", "group_id":"3791", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, 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"time_zone":"America\/Detroit", "event_title":"Journey to Joy with musical artist Cuee", "occurrence_title":"", "combined_title":"Journey to Joy with musical artist Cuee: Trans Awareness Month kickoff", "event_subtitle":"Trans Awareness Month kickoff", "event_type":"Other", "event_type_id":"22", "description":"We\u2019re kicking off Trans Awareness Month with something special\u2014a night to activate your joy.\r\n\r\nJoin Black trans recording artist and advocate Cuee for an evening that blends hype music, dynamic storytelling, and inspiration for the moment we are living in. Diving into what it took for him to find, protect, activate, and sustain his joy, Cuee will take us on a journey from a kid in Chicago, to a young adult in Kansas, to his transition into the man he is today.\r\n\r\nCome as you are. Experience the journey. Activate your joy. Leave transformed. \r\n\r\n\r\nTRANSGENDER AWARENESS MONTH\r\nhttps:\/\/spectrumcenter.umich.edu\/transgender-awareness-month\r\n\r\nMORE SPECTRUM CENTER EVENTS\r\nhttps:\/\/spectrumcenter.umich.edu\/events", "occurrence_notes":null, "guid":"136291-21878403@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/136291", "building_id":"1000120", "building_name":"Michigan Union", "campus_maps_id":"191", "room":"Pendleton Ballroom", "location_name":"Michigan Union", "has_livestream":0, "cost":"", "tags":["Trans Awareness Month"], "website":"https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSeo2F9s89ufGUl0vd5fzgWIgPV_JpV33rBo4L3_SFDOwm5iGw\/viewform", "sponsors":[ { "group_name":"Spectrum Center", "group_id":"1030", "website":"http:\/\/spectrumcenter.umich.edu" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2025\/10\/event_136291_original-1.jpg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2025\/10\/event_136291_original-1.jpg" }, "occurrence_count":1, "first_occurrence":21878403 } }