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Seminar

Elliptic Cohomology Learning Group: Spectral formal groups and orientations April 18, 2019 (03:30 PM PDT - 04:30 PM PDT)
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Location: MSRI: Simons Auditorium
Speaker(s) Paul VanKoughnett (Purdue University)
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Following last week's discussion of p-divisible groups over commutative ring spectra, we'll define formal groups over commutative ring spectra. One key example is the Quillen formal group associated to a complex oriented ring spectrum. We'll introduce the idea of an orientation of a formal group, which amounts to an isomorphism with the associated Quillen formal group. This will allow us to state the new construction of Morava E-theory -- it is the object representing oriented deformations of a height n formal group over a perfect field.

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