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Algebraic Geometry and Representation Theory Seminar

TuesdayDec 18, 201811:15
Algebraic Geometry and Representation Theory SeminarRoom 155
Speaker:Lenny Makar-LimanovTitle:On algebraically closed skew fields (i.e. Makar-Limanov's bodies).Abstract:opens in new windowin html    pdfopens in new window

We all know what is an algebraically closed field and that any field can be embedded into an algebraically closed field. But what happens if multiplication is not commutative? In my talk I'll suggest a definition of an algebraically closed skew field, give an example of such a skew field, and show that not every skew field can be embedded into an algebraically closed one.
It is still unknown whether an algebraically closed skew field exists in the finite characteristic case!

TuesdayDec 25, 201811:15
Algebraic Geometry and Representation Theory SeminarRoom 155
Speaker:Eyal SubagTitle:Symmetries of the hydrogen atom and algebraic familiesAbstract:opens in new windowin html    pdfopens in new window

The hydrogen atom system is one of the most thoroughly studied examples of a quantum mechanical system. It can be fully solved, and the main reason why is its (hidden) symmetry. In this talk I shall explain how the symmetries of the Schrödinger equation for the hydrogen atom, both visible and hidden, give rise to an example in the recently developed theory of algebraic families of Harish-Chandra modules. I will show how the algebraic structure of these symmetries completely determines the spectrum of the Schrödinger operator and sheds new light on the quantum nature of the system. No prior knowledge on quantum mechanics will be assumed.