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Using algebra and geometry we shall study their properties and structure, culminating in a Coxeter presentation for these groups.", "occurrence_notes":null, "guid":"115390-21834612@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/115390", "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":21834612 } , "113374-21830829": { "datetime_modified":"20231110T135223", "datetime_start":"20231120T160000", "datetime_end":"20231120T172000", "has_end_time":1, "date_start":"2023-11-20", "date_end":"2023-11-20", "time_start":"16:00:00", "time_end":"17:20:00", "time_zone":"America\/Detroit", "event_title":"Taxes and Telework: The Impacts of State Income", "occurrence_title":"", "combined_title":"Taxes and Telework: The Impacts of State Income: Jan K. Brueckner, University of California, Irvine", "event_subtitle":"Jan K. Brueckner, University of California, Irvine", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"This paper studies the interstate effects of decentralized taxation and spending when individuals can work from home (WFH), a possibility that decouples a state\u2019s population and employment levels. Our main findings show that a shift from a non-WFH economy to WFH reduces employment and raises the wage in high-tax states, with larger effects under source taxation. Once WHF is established, an increase in a state\u2019s tax rate either reduces employ- ment further while raising the wage (source taxation) or leaves the labor market unaffected (residence taxation). We show that the residence-taxation equilibrium is efficient.", "occurrence_notes":null, "guid":"113374-21830829@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/113374", "building_id":"1000154", "building_name":"Lorch Hall", "campus_maps_id":"88", "room":"201", "location_name":"Lorch Hall", "has_livestream":0, "cost":"", "tags":["Economics","Public Finance","seminar"], "website":"http:\/\/www.lsa.umich.edu\/econ", "sponsors":[ { "group_name":"Department of Economics", "group_id":"3302", "website":"http:\/\/www.lsa.umich.edu\/econ" }, { "group_name":"Public Finance", "group_id":"3553", "website":"" }, { "group_name":"Department of Economics Seminars", "group_id":"3566", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid_2x\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_large\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2023\/10\/event_113374_original-1.jpeg" }, "occurrence_count":1, "first_occurrence":21830829 } , "110614-21825162": { "datetime_modified":"20231120T072343", "datetime_start":"20231120T161500", "datetime_end":"20231120T173000", "has_end_time":1, "date_start":"2023-11-20", "date_end":"2023-11-20", "time_start":"16:15:00", "time_end":"17:30:00", "time_zone":"America\/Detroit", "event_title":"GLNT: Rational torsion in modular Jacobians", "occurrence_title":"", "combined_title":"GLNT: Rational torsion in modular Jacobians: Preston Wake (Michigan State University)", "event_subtitle":"Preston Wake (Michigan State University)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"For a prime number N, Ogg's conjecture states that the torsion in the Jacobian of the modular curve X_0(N) is generated by the cusps. Mazur proved Ogg's conjecture as one of the main theorems in his \"Eisenstein ideal\" paper. I'll talk about a generalization of Ogg's conjecture for squarefree N and a proof using the Eisenstein ideal. 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