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        "event_title":"Grants office hours: Get support applying for one of SSC's Sustainability Grants!",
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        "tags":["Environment","Sustainability"],
        "website":"https:\/\/planetblue.umich.edu\/campus\/get-involved\/for-students\/ssc\/grants\/",
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        "datetime_modified":"20260108T145844",
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        "event_title":"Pre-Law 101 Information Session",
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        "datetime_modified":"20260118T144519",
        "datetime_start":"20260121T150000",
        "datetime_end":"20260121T160000",
        "has_end_time":1,
        "date_start":"2026-01-21",
        "date_end":"2026-01-21",
        "time_start":"15:00:00",
        "time_end":"16:00:00",
        "time_zone":"America\/Detroit",
        "event_title":"Riemann's Existence Theorem",
        "occurrence_title":"",
        "combined_title":"Riemann's Existence Theorem: Jacob Zweifler",
        "event_subtitle":"Jacob Zweifler",
        "event_type":"Workshop \/ Seminar",
        "event_type_id":"21",
        "description":"If you search for statements of Riemann\u2019s Existence Theorem, you will find many seemingly different statements which all might deserve their own name. These statements, which go under the name RET, range from the existence of nonconstant meromorphic functions on compact Riemann surfaces to the classification of finite branched covers via fundamental group monodromy. Also related is the fact that all compact Riemann surfaces are algebraic. In this talk, I will explain how these different concepts are closely related (while using as little analysis as possible).",
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                "guid":"144089-21894639@events.umich.edu",
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        "location_name":"East Hall",
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        "tags":["Mathematics"],
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                "group_name":"Student Dynamics\/Geometry\/Topology Seminar - Department of Mathematics",
                "group_id":"4909",
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        "date_end":"2026-01-21",
        "time_start":"15:10:00",
        "time_end":"16:10:00",
        "time_zone":"America\/Detroit",
        "event_title":"MIPSE Seminar | Breaking Newton\u2019s Law: Using Dusty Plasma to Investigate Anisotropic Forces",
        "occurrence_title":"",
        "combined_title":"MIPSE Seminar | Breaking Newton\u2019s Law: Using Dusty Plasma to Investigate Anisotropic Forces: Prof. Lorin Swint Matthews, Baylor University",
        "event_subtitle":"Prof. Lorin Swint Matthews, Baylor University",
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        "description":"Abstract: \r\nThe stability of structures and transport of energy are affected by the forces acting between elements in the system. We are used to thinking of forces in terms of Newton\u2019s third law: for every action there is an equal and opposite reaction. However, there are some systems where the forces appear to be non-reciprocal; the objects exert different forces on each other. Such an interaction is possible when the interaction is anisotropic. In this case, the force between two particles depends on their relative orientation. Anisotropic interactions are known to arise in some of the most interesting complex systems, including proteins, electrorheological (ER) fluids, and liquid crystals. Here, we study anisotropic interactions in a complex, or dusty, plasma. We use numerical models of the interactions between ions and dust to learn the form of the anisotropic interaction potential. We can then use this potential to model the dynamics of interacting dust particles without modeling the ions. We compare the results of our models to experimental data collected in laboratory experiments conducted here on earth and on the International Space Station.\r\nThis work was supported by the US Department of Energy, Office of Fusion Energy Sciences (DE-SC0024681) and National Science Foundation (PHY-2308742, PHY-2308743).\r\n\r\nAbout the Speaker: \r\nLorin Swint Matthews is a Professor and Chair of the Department of Physics and Astronomy at Baylor University and Associate Director of the Center for Astrophysics, Space Physics, and Engineering Research. She received her Ph.D. in Physics from Baylor University in 1998. She worked for Raytheon Aircraft Integration Systems from 1998-2000 as a multi-disciplined engineer in the Flight Sciences Department, where she worked on NASA\u2019s SOFIA (Stratospheric Observatory for Infrared Astronomy) aircraft. In 2000, she joined the faculty at Baylor University. Her areas of research include numerical modeling and experimental investigations of the charging and dynamics of dust in astrophysical and laboratory plasma environments, for which she received a National Science Foundation CAREER Award in 2009. She is a Fellow of the American Physical Society.\r\n\r\nThis seminar is free and open to the public. It will be conducted in person and on Zoom, please check MIPSE website for details: https:\/\/mipse.umich.edu\/seminars_2526.php",
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        "description":"A smooth projective variety X is called D-affine if every left D-module is globally generated over D (the sheaf of differential operators) and has vanishing higher cohomology. A well known result of Beilinson-Bernstein asserts that over the field of complex numbers flag varieties of semi-simple algebraic groups are D-affine. So far, Flag varieties are the only known examples of smooth projective D-affine varieties. Moreover, Kashiwara-Lauritzen showed that over fields of positive characteristic the grassmannian Gr(2,5) is not D-affine and the classification of D-affine flag varieties remains an open problem.\r\n\r\nIn the first part of the talk, I will briefly recall the basics of D-affine varieties. Then, I will survey both the problem of classification of D-affine varieties over fields of arbitrary characteristic and the problem of classification of D-affine flag varieties in positive characteristic.  Finally, I will present my recent result: Over a field of positive characteristic the smooth even-dimensional quadric hypersurface of dimension at least four is not D-affine. This result implies that various other flag varieties fail to be D-affine and refines a previous result of A. Langer who showed that odd-dimensional quadrics are D-affine if the characteristic of the base field is sufficiently large.",
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