{ "114772-21833587": { "datetime_modified":"20240407T213055", "datetime_start":"20240419T150000", "datetime_end":"20240419T160000", "has_end_time":1, "date_start":"2024-04-19", "date_end":"2024-04-19", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"AIM Seminar: Solving Large Linear Systems Without Constructing a Preconditioner", "occurrence_title":"", "combined_title":"AIM Seminar: Solving Large Linear Systems Without Constructing a Preconditioner: Micha\u0142 Derezi\u0144ski, EECS, University of Michigan", "event_subtitle":"Micha\u0142 Derezi\u0144ski, EECS, University of Michigan", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Abstract: Solving systems of linear equations has numerous applications across many areas, from data science and machine learning, to scientific computing, engineering and more. When these systems are too large to solve directly, iterative refinement methods such as conjugate gradient have proven to be a powerful alternative. The computational cost of these methods can be significantly affected by a problem-dependent condition number, which is often addressed by combining the iterative solver with a preconditioner, i.e., an easy to invert approximation of the original system. However, constructing a good preconditioner can still be very expensive, which leads to an undesirable trade-off between the cost of preconditioning and the cost of solving the linear system.\r\n\r\nIn this talk, I will present new stochastic iterative methods for solving linear systems based on the so-called Sketch-and-Project paradigm, which can reduce the condition number of the system without having to precondition it. This approach is based on the following phenomenon: Whenever the spectral structure of a linear system is amenable to constructing a strong preconditioner via low-rank matrix approximation, we can design a Sketch-and-Project solver that will implicitly take advantage of this to find the solution faster. In particular, I will show how this leads to solving an n x n linear system with at most k large (outlying) singular values in ~O( n^2 + n k^2 ) arithmetic operations, which is faster than the ~O( n^2 k ) cost of constructing a good preconditioner for this system.\r\n\r\n\r\nContact: Robert Krasny", "occurrence_notes":null, "guid":"114772-21833587@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/114772", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"1084", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Applied Interdisciplinary Mathematics (AIM) Seminar - Department of Mathematics", "group_id":"4882", "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":21833587 } , "120864-21845491": { "datetime_modified":"20240328T181721", "datetime_start":"20240419T150000", "datetime_end":"20240419T160000", "has_end_time":1, "date_start":"2024-04-19", "date_end":"2024-04-19", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Andrew Choi & Ellen Hayashi, violin", "occurrence_title":"", "combined_title":"Andrew Choi & Ellen Hayashi, violin", "event_subtitle":"", "event_type":"Performance", "event_type_id":"15", "description":"Undergraduates Andrew Choi & Ellen Hayashi perform a recital on the violin.", "occurrence_notes":null, "guid":"120864-21845491@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/120864", "building_id":"1000440", "building_name":"Earl V. Moore Building", "campus_maps_id":"52", "room":"Hankinson Rehearsal Hall", "location_name":"Earl V. Moore Building", "has_livestream":0, "cost":"Free - no tickets required", "tags":["North Campus","Music","Free"], "website":"", "sponsors":[ { "group_name":"School of Music, Theatre & Dance (SMTD)", "group_id":"155", "website":"http:\/\/smtd.umich.edu\/events" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2024\/03\/event_120864_original-1.jpg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2024\/03\/event_120864_original-1.jpg" }, "occurrence_count":1, "first_occurrence":21845491 } , "121000-21845660": { "datetime_modified":"20240419T095627", "datetime_start":"20240419T150000", "datetime_end":"20240419T163000", "has_end_time":1, "date_start":"2024-04-19", "date_end":"2024-04-19", "time_start":"15:00:00", "time_end":"16:30:00", "time_zone":"America\/Detroit", "event_title":"Biological Anthropology Colloquium: \"Was Paranthropus actually absent from the Afar Depression (Ethiopia), or have we just not found it yet?\"", "occurrence_title":"", "combined_title":"Biological Anthropology Colloquium: \"Was Paranthropus actually absent from the Afar Depression (Ethiopia), or have we just not found it yet?\": Andrew Du, Assistant Professor, Department of Anthropology and Geography, Colorado State University", "event_subtitle":"Andrew Du, Assistant Professor, Department of Anthropology and Geography, Colorado State University", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"PLEASE NOTE: Room change to 411 West Hall\r\n\r\n\"After decades of fieldwork, the hominin genus Paranthropus is still not observed in the Afar Depression, Ethiopia. Researchers have proposed various ecological and evolutionary hypotheses explaining this pattern, but such explanations are contingent upon the absence of Paranthropus being a \"true\" pattern. Observed absence, however, is consistent with two mutually exclusive outcomes: Paranthropus never occupied the Afar, or it did but just has not been found yet. For my talk, I introduce a model that is able to place probabilities on these two outcomes to determine whether observed Paranthropus absence in the Afar reflects true absence.\"", "occurrence_notes":null, "guid":"121000-21845660@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/121000", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"411", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Anthropology","AEM Featured"], "website":"", "sponsors":[ { "group_name":"Department of Anthropology", "group_id":"3469", "website":"https:\/\/lsa.umich.edu\/anthro" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2024\/04\/event_121000_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2024\/04\/event_121000_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2024\/04\/event_121000_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2024\/04\/event_121000_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2024\/04\/event_121000_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2024\/04\/event_121000_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2024\/04\/event_121000_original-1.png" }, "occurrence_count":1, "first_occurrence":21845660 } , "121510-21846639": { "datetime_modified":"20240416T131425", "datetime_start":"20240419T150000", "datetime_end":"20240419T160000", "has_end_time":1, "date_start":"2024-04-19", "date_end":"2024-04-19", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Different Paths in Engineering: Virtual Alumni Panel", "occurrence_title":"", "combined_title":"Different Paths in Engineering: Virtual Alumni Panel", "event_subtitle":"", "event_type":"Careers \/ Jobs", "event_type_id":"2", "description":"Wondering about the different paths students take after getting their engineering PhD? Join us for a (virtual) alumni panel! You will have the opportunity to ask and hear all about alumni's academic journey and current lives after earning their engineering PhDs from U-M. Invited speakers: Dr. Diane Peters, Dr. Abigail (Abby) Azari, and Dr. Sahithya Reddivari.\r\n\r\nAttendees will have the opportunity to receive MDEN Swag!\r\n\r\nRSVP is required: https:\/\/sessions.studentlife.umich.edu\/track\/event\/session\/78103", "occurrence_notes":null, "guid":"121510-21846639@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/121510", "building_id":"null", "building_name":"Off Campus Location", "campus_maps_id":"1", "room":"", "location_name":"Virtual", "has_livestream":0, "cost":"", "tags":["Virtual","Professional Development","Networking","Michigan Engineering","Engineering","Career"], "website":"https:\/\/sessions.studentlife.umich.edu\/track\/event\/session\/78103", "sponsors":[ { "group_name":"Graduate Society of Women Engineers", "group_id":"2294", "website":"http:\/\/www.gradswe.engin.umich.edu\/" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2024\/04\/event_121510_original-1.jpg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2024\/04\/event_121510_original-1.jpg" }, "occurrence_count":1, "first_occurrence":21846639 } , "121452-21846562": { "datetime_modified":"20240414T211838", "datetime_start":"20240419T150000", "datetime_end":"20240419T160000", "has_end_time":1, "date_start":"2024-04-19", "date_end":"2024-04-19", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Faltings' theorem", "occurrence_title":"", "combined_title":"Faltings' theorem: Beomseok Kwon", "event_subtitle":"Beomseok Kwon", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Faltings' theorem states that an algebraic curve of genus at least 2 over a number field has only finitely many rational points. This striking result demonstrates how geometry can influence arithmetic properties. In this talk, I will present Bombieri's simplification of Vojta's proof. The key idea is to embed the curve into its Jacobian and study the height pairing on it. We will employ techniques from diophantine approximation to prove Vojta's inequality, which imposes a stringent condition on rational points.", "occurrence_notes":null, "guid":"121452-21846562@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/121452", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"4088", "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":21846562 } , "120680-21845122": { "datetime_modified":"20240325T100536", "datetime_start":"20240419T150000", "datetime_end":"20240419T163000", "has_end_time":1, "date_start":"2024-04-19", "date_end":"2024-04-19", "time_start":"15:00:00", "time_end":"16:30:00", "time_zone":"America\/Detroit", "event_title":"Fireside Chat with UM Alumni USDA Deputy Under Secretary Stacy Dean", "occurrence_title":"", "combined_title":"Fireside Chat with UM Alumni USDA Deputy Under Secretary Stacy Dean: \"Leveraging the USDA to tackle nutrition insecurity and systemic racism in the food system\"", "event_subtitle":"\"Leveraging the USDA to tackle nutrition insecurity and systemic racism in the food system\"", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"The UM Sustainable Food System Initiative, Transformative Food System (TFS) Fellows are welcoming USDA Deputy Under Secretary Stacy Dean, to speak on her career path from a UM student at the Ford School of Public Policy to working inside the federal government to advance President Biden\u2019s agenda to improve nutrition assistance for struggling families and individuals. \r\n\r\nThis fireside chat, titled \u201cLeveraging the USDA to tackle nutrition insecurity and systemic racism in the food system\u201d, will be held on Friday, April 19th, 3-4:30pm at the Ford School for Public Policy, Walter and Leonore Annenberg Auditorium (Room 1120). The event is open to the public and is supported by faculty and students of the Ford School of Public Policy, the School for Public Health, the School for Environment and Sustainability, and Taubman College of Architecture and Urban Planning. \r\n\r\nIf you are interested in learning more about the role of the USDA in food and nutrition, government career pathways, and the US food system, please join us in this conversation! \r\n\r\nThe TFS Fellows Planning Team:\r\nSai Cheruvu (TFS Fellow, SEAS)\r\nNia Dubon-Robinson (TFS Fellow, SEAS)\r\nj\u00f8n kent (TFS Fellow, Taubman College, Urban and Regional Planning)\r\nTaylor Kaili McKenzie (TFS Fellow, SEAS)\r\nSami Maldonado (TFS Fellow, SEAS)\r\nLesli Hoey (TFS Director, Taubman College, Urban and Regional Planning)", "occurrence_notes":null, "guid":"120680-21845122@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/120680", "building_id":"1005101", "building_name":"Weill Hall (Ford School)", "campus_maps_id":"527", "room":"Walter and Leonore Annenberg Auditorium (Room 1120)", "location_name":"Weill Hall (Ford School)", "has_livestream":0, "cost":"", "tags":["Talk","Alumni","Discussion","Diversity Equity and Inclusion","Nutrition","Social Justice","Social Impact","Public Policy","Public Health"], "website":"https:\/\/sites.lsa.umich.edu\/sustainablefoodsystems\/transformativefoodsystemsfellowship\/", "sponsors":[ { "group_name":"UM Sustainable Food Systems Initiative", "group_id":"3433", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2024\/03\/event_120680_original-1.jpeg" }, "occurrence_count":1, "first_occurrence":21845122 } }