{ "145458-21897372": { "datetime_modified":"20260225T091422", "datetime_start":"20260309T150000", "datetime_end":"20260309T160000", "has_end_time":1, "date_start":"2026-03-09", "date_end":"2026-03-09", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HEP-Astro Seminar | A frequentist view on cosmological neutrinos and dark-energy constraints", "occurrence_title":"", "combined_title":"HEP-Astro Seminar | A frequentist view on cosmological neutrinos and dark-energy constraints: Laura Herold (Johns Hopkins University)", "event_subtitle":"Laura Herold (Johns Hopkins University)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"The DESI galaxy survey has recently placed the tightest constraint on the sum of neutrino masses to date. For such effects \u201cbelow the detection limit\u201d, where data can only infer upper bounds, Bayesian and frequentist methods can give important complimentary information. I will begin with an overview of the frequentist profile-likelihood method, its advantages and limitations. Using a frequentist and Bayesian toolbox, I will discuss neutrino mass constraints from Planck and DESI data. In particular, I will focus on the impact of different assumptions about the neutrino mass hierarchy on the inferred mass bounds. Further, I will compare Bayesian and frequentist constraints on evolving dark energy from recent cosmological data.", "occurrence_notes":null, "guid":"145458-21897372@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/145458", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Science","Physics"], "website":"", "sponsors":[ { "group_name":"HEP - Astro Seminars", "group_id":"3799", "website":"" }, { "group_name":"Department of Physics", "group_id":"1965", "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":21897372 } , "145036-21896571": { "datetime_modified":"20260204T094256", "datetime_start":"20260309T150000", "datetime_end":"20260309T160000", "has_end_time":1, "date_start":"2026-03-09", "date_end":"2026-03-09", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Intersections of AI, Photonics, and Scientific Discovery", "occurrence_title":"", "combined_title":"Intersections of AI, Photonics, and Scientific Discovery: Marin Solja\u010di\u0107, Cecil and Ida Green Professor of Physics, Masachusetts Institute of Technology", "event_subtitle":"Marin Solja\u010di\u0107, Cecil and Ida Green Professor of Physics, Masachusetts Institute of Technology", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Abstract: Artificial intelligence is beginning to transform the way we do science and engineering\u2014not only by analyzing data, but increasingly by generating hypotheses, designing experiments, and even running them. Photonics plays a dual role in this story: it provides some of the most promising physical platforms for AI hardware, while also serving as a rich testbed for applying AI itself. I will discuss how conventional \u201cblack box\u201d AI and more interpretable approaches can both uncover structure in complex systems, and how large language models point toward a future where significant parts of scientific discovery may be automated. I will also highlight how robotics, combined with AI, is moving us closer to self-driving laboratories. While my examples will often come from photonics, the broader message is that these developments foreshadow a profound shift in how science is practiced across disciplines.\n\nBio: Marin Solja\u010di\u0107 is a Professor of Physics at MIT. He is a founder of a few companies, including WiTricity Corporation (2007), Lightelligence (2017) and Axiomatic (2024). His main research interests are in artificial intelligence as well as electromagnetic phenomena, focusing on nanophotonics, non-linear optics, and wireless power transfer. He is a co-author of more than 300 scientific articles, more than 100 issued US patents, and he has been invited to give more than 100 invited talks at conferences and universities around the world. He is a recipient of the Adolph Lomb medal from the Optical Society of America (2005), and the TR35 award of the Technology Review magazine (2006). In 2008, he was awarded a MacArthur fellowship \u201cgenius\u201d grant. He is an international member of the Croatian Academy of Engineering since 2009. In 2011 he became a Young Global Leader (YGL) of the World Economic Forum. In 2014, he was awarded Blavatnik National Award, as well as Invented Here! (Boston Patent Law Association). In 2017, he was awarded \u201cThe Order of the Croatian Daystar, with the image of Ru\u0111er Bo\u0161kovi\u0107\u201d, the Croatian President\u2019s top medal for Science. In 2017, the Croatian President also awarded him with \u201cThe Order of the Croatian Interlace\u201d medal. He was a Highly Cited Researcher according to WoS for 2019, 2020, 2021, 2022, 2023, 2024 & 2025. In 2023, he was awarded Max Born award of Optica.", "occurrence_notes":"Reception to follow in the Masco Commons", "guid":"145036-21896571@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/145036", "building_id":"1000397", "building_name":"Lurie Robert H. Engin. Ctr", "campus_maps_id":"90", "room":"Johnson Rooms (3rd Floor)", "location_name":"Lurie Robert H. Engin. Ctr", "has_livestream":0, "cost":"", "tags":["College Of Engineering","Lecture","engineering","Electrical Engineering and Computer Science","Electrical And Computer Engineering","Computer Science And Engineering","Computer Engineering"], "website":"http:\/\/www.ece.engin.umich.edu", "sponsors":[ { "group_name":"Electrical and Computer Engineering", "group_id":"3153", "website":"http:\/\/www.ece.engin.umich.edu" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2026\/02\/event_145036_original-1.jpg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2026\/02\/event_145036_original-1.jpg" }, "occurrence_count":1, "first_occurrence":21896571 } , "144927-21896159": { "datetime_modified":"20260211T154959", "datetime_start":"20260309T150000", "datetime_end":"20260309T160000", "has_end_time":1, "date_start":"2026-03-09", "date_end":"2026-03-09", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"MCDB Seminar> Microenvironmental sensing by intestinal stem cells promotes adult Drosophila intestinal regeneration", "occurrence_title":"", "combined_title":"MCDB Seminar> Microenvironmental sensing by intestinal stem cells promotes adult Drosophila intestinal regeneration: Dr. Parthive Patel- University of Bristol UK", "event_subtitle":"Dr. Parthive Patel- University of Bristol UK", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"A failure to properly maintain or regenerate an epithelium results in the loss of its integrity, architecture and function, and thus also organismal homeostasis. In many adult epithelia, stem cells divide to replace damaged or lost tissue cell types. Stem cells are coaxed to proliferate by signalling cues produced by cells in the regenerative microenvironment that forms shortly after injury. Cells within this microenvironment can include other epithelial cells as well as other cell types and tissues associated with the organ. While much is known about how signalling cues from the regenerative microenvironment promotes stem cell proliferation in several adult epithelia, we know less about how stem cells sense damage or even damage-causing pathogens and how they translate this information to modify their behaviour for regeneration. Furthermore, even less is understood about how stem cells modulate their microenvironment after tissue damage to support regeneration. \n\nUsing the adult Drosophila intestine (or midgut), we have uncovered mechanisms that allow intestinal stem cells (ISCs) to recognise tissue damage as well as invading pathogens and translate this into their proliferation for regeneration. Moreover, we have found that after damage, these same ISC pathways can shape the regenerative microenvironment.\n\nHost: Laura Buttitta", "occurrence_notes":null, "guid":"144927-21896159@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/144927", "building_id":"1005169", "building_name":"Biological Sciences Building", "campus_maps_id":"631", "room":"1010", "location_name":"Biological Sciences Building", "has_livestream":0, "cost":"", "tags":["Biology","Bsbsigns","seminar"], "website":"https:\/\/lsa.umich.edu\/mcdb\/news-events\/upcoming-events.html#date=2026-02-02&view=month", "sponsors":[ { "group_name":"Department of Molecular, Cellular, and Developmental Biology", "group_id":"3755", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/02\/event_144927_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/02\/event_144927_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2026\/02\/event_144927_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2026\/02\/event_144927_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2026\/02\/event_144927_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2026\/02\/event_144927_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2026\/02\/event_144927_original-1.png" }, "occurrence_count":1, "first_occurrence":21896159 } , "146319-21898875": { "datetime_modified":"20260308T184509", "datetime_start":"20260309T150000", "datetime_end":"20260309T160000", "has_end_time":1, "date_start":"2026-03-09", "date_end":"2026-03-09", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Perturbation of mixed characteristics test ideal", "occurrence_title":"", "combined_title":"Perturbation of mixed characteristics test ideal: Hanlin Cai, Columbia University", "event_subtitle":"Hanlin Cai, Columbia University", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Given a normal domain R of finite type over a mixed characteristic complete DVR or a perfect field of characteristic p, one can define the notion of a test ideal. In equal characteristic p, it is well known that test ideals are stable under small perturbations. The proof of this fact boils down to a fundamental result in Smith's thesis on tight closure, which states that there are no nonzero almost zero elements in the top local cohomology of R^+.In this talk, I will explain how to extend this result to the mixed characteristic setting, along with its applications to mixed characteristic test ideals. Time permitting, I will also outline the key ideas behind the proof. This is joint work in progress with Bhargav Bhatt and Linquan Ma.", "occurrence_notes":null, "guid":"146319-21898875@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/146319", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"3088", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics","seminar"], "website":"", "sponsors":[ { "group_name":"Commutative Algebra Seminar - Department of Mathematics", "group_id":"4886", "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":21898875 } , "145083-21896643": { "datetime_modified":"20260204T164301", "datetime_start":"20260309T150000", "datetime_end":"20260309T163000", "has_end_time":1, "date_start":"2026-03-09", "date_end":"2026-03-09", "time_start":"15:00:00", "time_end":"16:30:00", "time_zone":"America\/Detroit", "event_title":"Services for Students with Disabilities Office Hours", "occurrence_title":"", "combined_title":"Services for Students with Disabilities Office Hours", "event_subtitle":"", "event_type":"Well-being", "event_type_id":"12", "description":"Introducing Services for Students with Disabilities Office Hours! Stop by the Spectrum Center to learn about Services for Students with Disabilities, how to connect with us, and how we can support you. Also, we\u2018ll have some cool swag for you, including stickers!", "occurrence_notes":null, "guid":"145083-21896643@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/145083", "building_id":"1000120", "building_name":"Michigan Union", "campus_maps_id":"191", "room":"Spectrum Center, Room 3020", "location_name":"Michigan Union", "has_livestream":0, "cost":"", "tags":["academics","sexuality","services for students with disabilities","lgbt","Inclusion","educational","disability","disabilities","Accommodations","accessibility","access","student life"], "website":"https:\/\/studentaccessibility.umich.edu\/applying-for-accommodations", "sponsors":[ { "group_name":"Services for Students with Disabilities", "group_id":"1203", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/02\/event_145083_original-1.jpg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2026\/02\/crop-event_145083_original-1.jpg" }, "occurrence_count":6, "first_occurrence":21896641 } , "130127-21897563": { "datetime_modified":"20260309T142056", "datetime_start":"20260309T150000", "datetime_end":"20260309T160000", "has_end_time":1, "date_start":"2026-03-09", "date_end":"2026-03-09", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Social Work Grad School Info Session", "occurrence_title":"Winter 2026 Social Work Grad School Info Session", "combined_title":"Social Work Grad School Info Session: Winter 2026 Social Work Grad School Info Session", "event_subtitle":"", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"The Psychology Dept. is hosting a Grad School Informational session with the School of Social Work.This virtual event will take place on Monday, January 27 at 3:00pm via Zoom.Please register for this event so that you will receive an email confirmation that includes the Zoom link for the session. You will also receive a reminder message 24-48 hours before events. You can delete registration at any time through Sessions @ Michigan.", "occurrence_notes":null, "guid":"130127-21897563@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/130127", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"Livestream", "has_livestream":0, "cost":"", "tags":["Sessions"], "website":"https:\/\/sessions.studentlife.umich.edu\/p\/track\/13217", "sponsors":[ { "group_name":"Sessions @ Michigan", "group_id":"4791", "website":"https:\/\/sessions.studentlife.umich.edu\/" } ], "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":21897563 } , "142308-21890446": { "datetime_modified":"20251202T085317", "datetime_start":"20260309T153000", "datetime_end":"20260309T170000", "has_end_time":1, "date_start":"2026-03-09", "date_end":"2026-03-09", "time_start":"15:30:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"RCGD Seminar Series on Social Connection: Kristina Smiley", "occurrence_title":"", "combined_title":"RCGD Seminar Series on Social Connection: Kristina Smiley: How Hormones and Sensory Cues Shape the Parental Brain", "event_subtitle":"How Hormones and Sensory Cues Shape the Parental Brain", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Kristina Smiley\r\nUniversity of Michigan\r\nHow Hormones and Sensory Cues Shape the Parental Brain\r\nMarch 9, 2026\r\n\r\nABOUT THE SERIES\r\n\r\nThe Winter 2026 RCGD Seminar Series: The Ties that Bond: Interdisciplinary Perspectives on Social Connection\r\n\r\nThis seminar series brings together senior and early-career scholars to explore fundamental questions about how we connect, protect, and care. Talks will highlight lifespan and comparative approaches to understanding social connection, physiological implications of social and race-related stressors, and diverse conceptualizations of what it means to belong\u2014from romantic and parent\u2013child relationships to group and societal dynamics to technology-mediated interactions.\r\n\r\nRobin Edelstein, Professor of Psychology at the University of Michigan and an affiliate of the Research Center for Group Dynamics, has organized this series. She will introduce the series at this kick-off event that doubles as a faculty meeting.\r\n\r\nThe first seminar in the series will be Jan. 26. Join us on Mondays to learn about the biological, social, and developmental pathways that shape human connection.\r\n\r\nThese events are held Mondays from 3:30 to 5.\r\nIn person: ISR Thompson 1430, unless otherwise specified.\r\nOrganized by Robin Edelstein\r\nAs permissions allow, seminars are later posted to our YouTube playlist.", "occurrence_notes":null, "guid":"142308-21890446@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/142308", "building_id":"1000145", "building_name":"Institute For Social Research", "campus_maps_id":"76", "room":"1430", "location_name":"Institute For Social Research", "has_livestream":0, "cost":"", "tags":["Biology","Social Sciences","Psychology","Medicine"], "website":"https:\/\/rcgd.isr.umich.edu\/", "sponsors":[ { "group_name":"Research Center for Group Dynamics (RCGD)", "group_id":"4836", "website":"https:\/\/rcgd.isr.umich.edu\/" }, { "group_name":"Center for Political Studies - Institute for Social Research", "group_id":"3159", "website":"http:\/\/www.isr.umich.edu\/cps\/" }, { "group_name":"Department of Psychology", "group_id":"3615", "website":"http:\/\/www.lsa.umich.edu\/psych\/" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2025\/12\/event_142308_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2025\/12\/event_142308_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2025\/12\/event_142308_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2025\/12\/event_142308_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2025\/12\/event_142308_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2025\/12\/event_142308_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2025\/12\/event_142308_original-1.png" }, "occurrence_count":1, "first_occurrence":21890446 } , "143124-21892178": { "datetime_modified":"20260304T174808", "datetime_start":"20260309T160000", "datetime_end":"20260309T170000", "has_end_time":1, "date_start":"2026-03-09", "date_end":"2026-03-09", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"An introduction to Dirac geometry and reduction schemes for concurrent Dirac structures.", "occurrence_title":"", "combined_title":"An introduction to Dirac geometry and reduction schemes for concurrent Dirac structures.: Alessandro Arsie (The University of Toledo)", "event_subtitle":"Alessandro Arsie (The University of Toledo)", "event_type":"Livestream \/ Virtual", "event_type_id":"24", "description":"I will provide first a gentle introduction to Dirac geometry, which is a way to unify pre-symplectic and Poisson geometry, as well as turning possibly singular Poisson structures into a perfectly smooth object. \n\nAfter this, I will consider a particular situation of transferring Dirac structures which is the following:\ngiven an embedded submanifold X of a Dirac manifold (M, L_M) and given p: X -> Y a smooth surjective submersion, we want to derive the minimal set of conditions to transfer the Dirac structure L_M on M to a Dirac structure L_Y on Y. These conditions are however not compatible with concurrence, which is a generalization for Dirac structures of the notion of commuting Poisson pairs. \n\nThen I will characterize a geometric structure, more precisely a vector bundle E\\subset TM|_X that is a \\emph{witness} for concurrence: it allows to transfer weakly concurrent Dirac structures on M to weakly concurrent Dirac structures on Y. We show that the Marsden-Ratiu reduction in Poisson geometry is exactly a special case of this construction. Furthermore, in the presence of a Hamiltonian action of a Lie group G on L_M, there is a natural candidate for a witness E. \n\nThe main results carry over to the case of complex Dirac structures. This allows us to give an extension of the bi-Hamiltonian reduction of Casati, Magri e Pedroni in terms of our framework and provide a (conjectural) interpretation of it in terms of complex Dirac structures. \n\nThis talk is based on a joint work with Dan Aguero, Pedro Frejlich and Igor Mencattini.", "occurrence_notes":null, "guid":"143124-21892178@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/143124", "building_id":"null", "building_name":"Off Campus Location", "campus_maps_id":"1", "room":"", "location_name":"Virtual", "has_livestream":0, "cost":"", "tags":["Mathematics","Seminar","Virtual"], "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":"" }, "occurrence_count":1, "first_occurrence":21892178 } }