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PRODID:Mathematics Seminar Calendar
BEGIN:VEVENT
UID:20181216T130720-15399@math.msu.edu
DTSTAMP:20181216T130720Z
SUMMARY:Hochschild Cohomology
DESCRIPTION:Speaker\: Nick Ovenhouse, MSU\r\nI will give the basic definitions of Hochschild cohomology, and discuss interpretations of the first few cohomology groups H^0, H^1, and H^2. Time permitting, I will discuss how the groups H^2 and H^3 are related to formal deformations of algebras and quantization of Poisson brackets.
LOCATION:C517 Wells Hall
DTSTART:20180910T170000Z
DTEND:20180910T175000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=15399
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BEGIN:VEVENT
UID:20181216T130720-15404@math.msu.edu
DTSTAMP:20181216T130720Z
SUMMARY:Absolute Values and Ostrowski's Theorem
DESCRIPTION:Speaker\: Joshua Ruiter, MSU\r\nThe notion of an absolute value function can be generalized to arbitrary fields; one example is the p-adic absolute value on the rational. Ostrowski's theorem classifies all absolute values on the rationals. An absolute value induces a metric in a natural way, so we can "complete" a field with respect to a given absolute value. We'll also discuss the close relationship between absolute values and discrete valuation rings.
LOCATION:C517 Wells Hall
DTSTART:20180917T170000Z
DTEND:20180917T175000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=15404
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BEGIN:VEVENT
UID:20181216T130720-15425@math.msu.edu
DTSTAMP:20181216T130720Z
SUMMARY:Witt Schemes and Witt Vectors
DESCRIPTION:Speaker\: Chuangtian Guan, MSU\r\n
LOCATION:C517 Wells Hall
DTSTART:20180924T170000Z
DTEND:20180924T175000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=15425
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BEGIN:VEVENT
UID:20181216T130720-15441@math.msu.edu
DTSTAMP:20181216T130720Z
SUMMARY:Étale Cohomology and its Applications to Curves
DESCRIPTION:Speaker\: Charlotte Ure, MSU\r\nÉtale cohomology was originally introduced by Grothendieck in the 1960s as a tool for solving the Weil conjectures. Since then it has proven very useful in algebraic and arithmetic geometry. In my talk, I will introduce the notion of Grothendieck topology, étale site, and étale cohomology. I will then explore the cohomology of curves and briefly describe some applications. This talk will be accessible to all levels.
LOCATION:C517 Wells Hall
DTSTART:20181008T170000Z
DTEND:20181008T175000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=15441
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BEGIN:VEVENT
UID:20181216T130720-16477@math.msu.edu
DTSTAMP:20181216T130720Z
SUMMARY:Universal Central Extensions
DESCRIPTION:Speaker\: Joshua Ruiter, MSU\r\nI'll define universal central extensions of groups, and prove a criterion for a central extension to be universal. Time permitting, I'll connect this to the 2nd algebraic K-group of a ring, and a certain group cohomology.
LOCATION:C517 Wells Hall
DTSTART:20181112T180000Z
DTEND:20181112T190000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=16477
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BEGIN:VEVENT
UID:20181216T130720-17480@math.msu.edu
DTSTAMP:20181216T130720Z
SUMMARY:The Brauer Class Associated to the Binary Cubic Generic Clifford Algebra
DESCRIPTION:Speaker\: Charlotte Ure, MSU\r\nThe Clifford algebra associated to a quadratic form is a classical algebraic object with many applications. Its definition can be generalized to forms of higher degree. In the case of a binary cubic form, the center of the associated Clifford algebra is isomorphic to the affine coordinate ring of an elliptic curve. Furthermore, it is an Azumaya algebra over its center and thus it defines an element in the Brauer group. We study this phenomenon in families and show that the universal class (the class of the binary cubic generic Clifford algebra) is never trivial. This is joint work with Rajesh Kulkarni.
LOCATION:C517 Wells Hall
DTSTART:20181119T180000Z
DTEND:20181119T190000Z
URL:https://math.msu.edu/Seminars/TalkView.aspx?talk=17480
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