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Our main result is that if two slice knots have sufficiently different knot Floer homology, then the resulting exotic R^4's made with the simplest Casson handle are distinct. This allows us to distinguish an explicit infinite family of exotic R^4's. Our main tool is Gadgil's end Floer homology, which we compute effectively by analyzing Heegaard Floer cobordism maps. We also discuss new phenomena related to these R^4's, and relevance to the open problem of finding infinitely many smooth structures on all noncompact 4 manifolds. This is joint work with Jen Hom, Tye Lidman, and Shunyu Wan.", "occurrence_notes":null, "guid":"150488-21909511@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/150488", "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":"Topology Seminar - Department of Mathematics", "group_id":"4910", "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":21909511 } , "151419-21911571": { "datetime_modified":"20260902T161740", "datetime_start":"20261009T163000", "datetime_end":"20261009T180000", "has_end_time":1, "date_start":"2026-10-09", "date_end":"2026-10-09", "time_start":"16:30:00", "time_end":"18:00:00", "time_zone":"America\/Detroit", "event_title":"2026 Faculty Mixer", "occurrence_title":"", "combined_title":"2026 Faculty Mixer", "event_subtitle":"", "event_type":"Reception \/ Open House", "event_type_id":"17", "description":"Socialize with your faculty colleagues and visit the University\u2019s famous Kelsey Museum of Archaeology during our annual Faculty Mixer event. 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Join us in the WISE space for snacks, new friends, professional development lead by our student mentors, and time for connections in small groups! All are welcome.\nSTEM equity for everyone needs everyone! WISE programming is open to all students regardless of sex, gender, or gender identity.", "occurrence_notes":null, "guid":"151300-21912380@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151300", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"WISE Office, 3236 Undergraduate Science Building", "has_livestream":0, "cost":"", "tags":["Engineering","Food","Free","Graduate Students","Michigan Engineering","Sessions","Undergraduate Students"], "website":"https:\/\/sessions.studentlife.umich.edu\/p\/track\/17813", "sponsors":[ { "group_name":"Sessions @ Michigan", "group_id":"4791", "website":"https:\/\/sessions.studentlife.umich.edu\/" }, { "group_name":"Women in Science and Engineering (WISE) Program", "group_id":"3737", "website":"http:\/\/wise.umich.edu" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/09\/event_151300_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_thumb\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_2x\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_lightbox\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb_square\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid_2x\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_large\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_thumb\/media\/attachments\/2026\/09\/crop-event_151300_original-1.png" }, "occurrence_count":4, "first_occurrence":21911337 } , "152773-21914495": { "datetime_modified":"20260923T165210", "datetime_start":"20261009T163000", "datetime_end":"20261009T180000", "has_end_time":1, "date_start":"2026-10-09", "date_end":"2026-10-09", "time_start":"16:30:00", "time_end":"18:00:00", "time_zone":"America\/Detroit", "event_title":"Yale Law School Information Session", "occurrence_title":"", "combined_title":"Yale Law School Information Session: Current YLS Student, Susan He", "event_subtitle":"Current YLS Student, Susan He", "event_type":"Presentation", "event_type_id":"16", "description":"Join us for a private in-person open house for students and alumni featuring YLS Student Susan He \u201921, MS \u201922, regarding student life and the admissions process at Yale Law School. 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