{"id":4041,"date":"2026-07-08T07:37:43","date_gmt":"2026-07-08T12:37:43","guid":{"rendered":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/?post_type=tribe_events&#038;p=4041"},"modified":"2026-07-08T07:37:43","modified_gmt":"2026-07-08T12:37:43","slug":"lans-seminar-206","status":"publish","type":"tribe_events","link":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/event\/lans-seminar-206\/","title":{"rendered":"LANS Seminar"},"content":{"rendered":"<p><strong>Seminar Title: <\/strong>A Review of \u201cFaster Linear Algebra with Structured Random Matrices\u201d<\/p>\n<p><strong>Speaker: <\/strong>Vishwas Rao, Computational Mathematician<\/p>\n<p><strong>Affiliation: <\/strong>Argonne National Laboratory, MCS Division<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Date:<\/strong>\u00a0Thursday, July 9, 2026<\/p>\n<p><strong>Time:<\/strong>\u00a02:30 PM-3:30 PM (In-Person)<\/p>\n<p><strong>Location:<\/strong>\u00a0Hybrid, Bldg. 240, Conference Room 4301<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Zoom Link: <\/strong><a href=\"https:\/\/argonne.zoomgov.com\/j\/1659346308?pwd=peKBZ2iAXFz4TTxuveQukvfIUfmqxb.1\"><strong>https:\/\/argonne.zoomgov.com\/j\/1659346308?pwd=peKBZ2iAXFz4TTxuveQukvfIUfmqxb.1<\/strong><\/a><\/p>\n<p><strong>Meeting ID: 165 934 6308<\/strong><\/p>\n<p><strong>Passcode: 448219<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Abstract: <\/strong>This is an expository talk reviewing a recent paper by Cama\u00f1o, Epperly, Meyer, and Tropp; none of the results are my own. Randomized algorithms for the SVD, Nystr\u00f6m approximation, and least squares all rely on the same trick: replace A large matrix A with a small random sketch. In theory, the random test matrix is a dense Gaussian. In practice, people reach for much cheaper structured alternatives \u2013 sparce matrices, fast trigonometric transforms, Khatri-Rao products \u2013 and they work just as well. We\u2019ll look at these cheaper alternatives through two lenses for what it means for a sketch to \u201cwork\u201d: oblivious subspace embeddings (OSEs) and oblivious subspace injections (OSIs).<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Bio: <\/strong>Vishwas Rao is a Computational Mathematician at the MCS division.\u00a0 He has been at Argonne National Laboratory since 2017.<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p>See all upcoming talks at\u00a0<a href=\"https:\/\/www.anl.gov\/mcs\/lans-seminars\">https:\/\/www.anl.gov\/mcs\/lans-seminars<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Seminar Title: A Review of \u201cFaster Linear Algebra with Structured Random Matrices\u201d Speaker: Vishwas Rao, Computational Mathematician Affiliation: Argonne National Laboratory, MCS Division &nbsp; Date:\u00a0Thursday, July 9, 2026 Time:\u00a02:30 PM-3:30 PM (In-Person) Location:\u00a0Hybrid, Bldg. 240, Conference Room 4301 &nbsp; Zoom &hellip; <a href=\"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/event\/lans-seminar-206\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":976,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":"","_members_access_role":[],"_members_access_error":""},"tags":[],"tribe_events_cat":[2],"class_list":["post-4041","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-seminar","cat_seminar"],"acf":[],"_links":{"self":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events\/4041","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events"}],"about":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/types\/tribe_events"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/users\/976"}],"version-history":[{"count":1,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events\/4041\/revisions"}],"predecessor-version":[{"id":4042,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events\/4041\/revisions\/4042"}],"wp:attachment":[{"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/media?parent=4041"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tags?post=4041"},{"taxonomy":"tribe_events_cat","embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/lans-seminars\/wp-json\/wp\/v2\/tribe_events_cat?post=4041"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}