{"185201":{"#nid":"185201","#data":{"type":"event","title":"CSE Seminar: Dr. Jack Poulson","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ECSE Seminar\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ESpeaker:\u003C\/strong\u003E \u0026nbsp;Dr. Jack Poulson, Postdoctoral Fellow in the Department of Mathematics at Stanford University\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ETitle:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EFast parallel solution of heterogeneous 3D time-harmonic wave equations\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003ESeveral advancements related to the iterative solution of heterogeneous 3D time-harmonic wave equations are presented. In particular, efficient distributed-memory parallelizations of sweeping preconditioners are discussed in the context of Helmholtz equations and\u003C\/p\u003E\u003Cp\u003Elinear elasticity, and it will be shown that challenging 3D problems approaching a billion degrees of freedom can be solved in just a few minutes using several thousand cores. In addition, several high-performance parallel algorithms are proposed for performing multifrontal triangular solves with many right-hand sides, and a custom Kronecker-product compression scheme for the sweeping preconditioner is introduced which is motivated by the translation invariance of free-space Green\u0027s functions. Lastly, the software developed as part of this\u003C\/p\u003E\u003Cp\u003Eresearch is made freely available through Parallel Sweeping Preconditioner (PSP) [1] and Clique [2], a distributed-memory multifrontal solver. Both of these packages are built upon the author\u0027s distributed-memory dense linear algebra library, Elemental [3].\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003Cstrong\u003EAuthor Bio:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EJack Poulson is a Postdoctoral Fellow in the Department of Mathematics at Stanford University working with Lexing Ying. He received his Ph.D. in Computational and Applied Mathematics from the Institute of Computational Engineering and Sciences (ICES)\u003C\/p\u003E\u003Cp\u003Eat the University of Texas at Austin at the end of 2012 and is interested in the development and application of scalable fast algorithms.\u003C\/p\u003E\u003Cp\u003E[1] \u003Ca href=\u0022http:\/\/bitbucket.org\/poulson\/psp\u0022\u003Ehttp:\/\/bitbucket.org\/poulson\/psp\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003E[2] \u003Ca href=\u0022http:\/\/bitbucket.org\/poulson\/clique\u0022\u003Ehttp:\/\/bitbucket.org\/poulson\/clique\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003E[3] \u003Ca href=\u0022http:\/\/code.google.com\/p\/elemental\u0022\u003Ehttp:\/\/code.google.com\/p\/elemental\u003C\/a\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Fast parallel solution of heterogeneous 3D time-harmonic wave equations"}],"uid":"27439","created_gmt":"2013-01-18 12:42:36","changed_gmt":"2016-10-08 02:02:10","author":"Lometa Mitchell","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2013-01-25T13:00:00-05:00","event_time_end":"2013-01-25T14:00:00-05:00","event_time_end_last":"2013-01-25T14:00:00-05:00","gmt_time_start":"2013-01-25 18:00:00","gmt_time_end":"2013-01-25 19:00:00","gmt_time_end_last":"2013-01-25 19:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"37041","name":"Computational Science and Engineering"},{"id":"47223","name":"College of Computing"},{"id":"50875","name":"School of Computer Science"},{"id":"50876","name":"School of Interactive Computing"},{"id":"50877","name":"School of Computational Science and Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EHost: Dr.\u0026nbsp;Edmond Chow\u0026nbsp;: \u003Ca href=\u0022mailto:echow@cc.gatech.edu\u0022\u003Eechow@cc.gatech.edu\u003C\/a\u003E \u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}