{ "128992-21861995": { "datetime_modified":"20241110T235211", "datetime_start":"20241113T150000", "datetime_end":"20241113T160000", "has_end_time":1, "date_start":"2024-11-13", "date_end":"2024-11-13", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Learning Seminar in Algebraic Combinatorics: Poincare duality algebras, the Kahler package, and volume polynomials", "occurrence_title":"", "combined_title":"Learning Seminar in Algebraic Combinatorics: Poincare duality algebras, the Kahler package, and volume polynomials: George H. Seelinger", "event_subtitle":"George H. Seelinger", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"By what has been shown in previous talks, we have seen that we can show coefficients of the characteristic polynomial of a realizable matroid can be realized via specific computations in the Chow ring of its wonderful compactification. In this talk, we will introduce the notion of Poincare duality algebras, which are graded algebras with a degree function giving an isomorphism from the top degree to the base field that induces a non-degenerate pairing between complementary degrees of the algebra. Furthermore, we will introduce a notion of hard Lefschetz and Hodge-Riemann relations for such algebras. When a Poincare duality algebra satisfies a certain version of these properties, we can show that the log-concavity of its \"volume polynomial\" is equivalent to the eigenvalues of a symmetric form on the algebra arising from the Hodge-Riemann relations. Because the Hodge-Riemann relations in appropriate degree imply the log-concavity of the coefficients of the characteristic polynomial of the matroid, this framework gives us a program to establish the log-concavity result. Throughout this talk, I will attempt to provide intuition from the case of the Chow rings of smooth projective varieties.", "occurrence_notes":null, "guid":"128992-21861995@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/128992", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"4088", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":[], "website":"", "sponsors":[ { "group_name":"Learning Seminar in Algebraic Combinatorics - Department of Mathematics", "group_id":"4894", "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":21861995 } , "125049-21854295": { "datetime_modified":"20241030T143629", "datetime_start":"20241113T150000", "datetime_end":"20241113T170000", "has_end_time":1, "date_start":"2024-11-13", "date_end":"2024-11-13", "time_start":"15:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Opening Reception for Hoshea Love: Photographs", "occurrence_title":"", "combined_title":"Opening Reception for Hoshea Love: Photographs: With Hoshea Love in conversation with curator Amanda Krugliak.", "event_subtitle":"With Hoshea Love in conversation with curator Amanda Krugliak.", "event_type":"Reception \/ Open House", "event_type_id":"17", "description":"Join us as we celebrate the opening of the pop-up exhibition *Hoshea Love: Photographs* in the Osterman Common Room. Artist Hoshea Love will be in conversation with curator Amanda Krugliak.\r\n\r\nHoshea Love is 85 years old. Born in San Francisco and raised in Southern California, Love has traveled without bounds across the United States, getting an education formally and spiritually. He holds degrees in fine art, metaphysical science, and biology (specializing in sustainable living) and is licensed in metaphysical science and traditional ministry.\r\n\r\nLove\u2019s colorful, abstract photographs are inspired by nature and the nature of things, taking inventory of the immense beauty that surrounds us and guides us in our searching.\r\n\r\nLove\u2019s work has been exhibited at the Ellen Kayrod Gallery, Detroit, and the U-M Museum of Art. He is a former artist-in-residence at The Heidelberg Project in Detroit.", "occurrence_notes":null, "guid":"125049-21854295@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/125049", "building_id":"1005179", "building_name":"Thayer Academic Building", "campus_maps_id":"676", "room":"Osterman Common Room #1022", "location_name":"Thayer Academic Building", "has_livestream":0, "cost":"", "tags":["Art","Humanities","Visual Arts"], "website":"http:\/\/www.lsa.umich.edu\/humanities", "sponsors":[ { "group_name":"Institute for the Humanities", "group_id":"1130", "website":"http:\/\/www.lsa.umich.edu\/humanities" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2024\/08\/event_125049_original-1.jpeg" }, "occurrence_count":1, "first_occurrence":21854295 } , "126221-21856734": { "datetime_modified":"20240918T103127", "datetime_start":"20241113T150000", "datetime_end":"20241113T170000", "has_end_time":1, "date_start":"2024-11-13", "date_end":"2024-11-13", "time_start":"15:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Pugs & Planning @ The DSI", "occurrence_title":"", "combined_title":"Pugs & Planning @ The DSI", "event_subtitle":"", "event_type":"Social \/ Informal Gathering", "event_type_id":"19", "description":"Join us at the DSI to learn about the exciting courses we will be offering for Winter 2025!\r\n\r\nOur resident Digital Studies Academic Advisor and Professor, Toni Bushner, will be available to answer any questions about courses and the Digital Studies minor. Toni's pugs Draco and Ludo will also be here to help!\r\n\r\nSnacks and drinks will be provided! No RSVP needed!", "occurrence_notes":null, "guid":"126221-21856734@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/126221", "building_id":"1000197", "building_name":"Mason Hall", "campus_maps_id":"540", "room":"G333\/G325", "location_name":"Mason Hall", "has_livestream":0, "cost":"", "tags":["Digital Studies","Digital Studies Institute"], "website":"", "sponsors":[ { "group_name":"Digital Studies Institute", "group_id":"4337", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2024\/09\/event_126221_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2024\/09\/event_126221_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2024\/09\/event_126221_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2024\/09\/event_126221_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2024\/09\/event_126221_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2024\/09\/event_126221_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2024\/09\/event_126221_original-1.png" }, "occurrence_count":1, "first_occurrence":21856734 } }