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We will provide a criterion for whether positroid varieties are smooth at certain distinguished points, and we will show that this information is sufficient to determine smoothness for the entire positroid variety. This will involve looking at combinatorial diagrams called \"affine pipe dreams.\" We can also form a partial order on positroid varieties given by deletion and contraction, such that there is closure for smooth positroid varieties, and we will characterize the minimal singular elements in this order. Finally, we will discuss a couple of connections between the techniques of this work and planar N=4 SYM: the BCFW bridge decomposition and inverse soft factors.", "occurrence_notes":null, "guid":"124879-21853978@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/124879", "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":"Combinatorics Seminar - Department of Mathematics", "group_id":"4885", "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":21853978 } , "126360-21857014": { "datetime_modified":"20240913T121015", "datetime_start":"20241115T150000", "datetime_end":"20241115T160000", "has_end_time":1, "date_start":"2024-11-15", "date_end":"2024-11-15", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"SoConDi", "occurrence_title":"", "combined_title":"SoConDi: Discussion Group", "event_subtitle":"Discussion Group", "event_type":"Meeting", "event_type_id":"14", "description":"The SoConDi group is both a discussion platform and a study group for students and faculty members who are interested in sociolinguistics, language contact, discourse analysis and related disciplines including linguistic anthropology. Members of the SoConDi group present their work in progress from time to time, and discuss current issues in the disciplines, or study selected readings together.", "occurrence_notes":null, "guid":"126360-21857014@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/126360", "building_id":"null", "building_name":"Off Campus Location", "campus_maps_id":"1", "room":"Lorch 473", "location_name":"Hybrid", "has_livestream":1, "livestream_type":"zoom", "livetream_require_login":0, "livestream_id":"93271148173", "livestream_password":"socondi", "livestream_link":"https:\/\/umich.zoom.us\/j\/93271148173", "cost":"", "tags":["Language Contact","Sociolinguistics"], "website":"", "sponsors":[ { "group_name":"Department of Linguistics", "group_id":"3480", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2024\/09\/event_126360_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2024\/09\/event_126360_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2024\/09\/event_126360_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2024\/09\/event_126360_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2024\/09\/event_126360_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2024\/09\/event_126360_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2024\/09\/event_126360_original-1.png" }, "occurrence_count":7, "first_occurrence":21857009 } , "128990-21861982": { "datetime_modified":"20241110T214551", "datetime_start":"20241115T150000", "datetime_end":"20241115T160000", "has_end_time":1, "date_start":"2024-11-15", "date_end":"2024-11-15", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Student Algebraic Geometry: An Introduction to Period Domains", "occurrence_title":"", "combined_title":"Student Algebraic Geometry: An Introduction to Period Domains: Barry Henaku", "event_subtitle":"Barry Henaku", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"In this talk, we give an introduction to the theory of period domains and period integrals. For any compact K\u00e4hler manifold X, the Hodge theorem gives a decomposition of the cohomology of X as the direct sum of complex vector spaces. Such a decomposition can be generalized to the notion of a Hodge structure, which has an equivalent description in terms of the Hodge filtration. Our goal is to study these variations on Hodge structures by viewing this filtration through the lens of the Grassmannian and flag manifolds. We provide a concrete example where we show that the parameter space for the polarized Hodge structures of a compact Riemann surface of genus q is analytically isomorphic to the Siegel upper half space.", "occurrence_notes":null, "guid":"128990-21861982@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/128990", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"2866", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Student Algebraic Geometry Seminar - Department of Mathematics", "group_id":"4904", "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":21861982 } }