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Event

Amit Ophir (Jerusalem)

Thursday, March 24, 2022 15:00to16:30

Québec-Vermont Number Theory Seminar

Title:ÌýInvariantÌýnormsÌýon the p-adic Schrodinger representation.

´¡²ú²õ³Ù°ù²¹³¦³Ù:ÌýMotivated by questions about a p-adic Fourier transform, we studyÌýinvariantÌýnormsÌýon the p-adic Schrödinger representations of Heisenberg groups. These Heisenberg groups are p-adic, and the Schrodinger representations are explicit irreducible smooth representations that playÌýan important role in their representation theory.Ìý
Classically, the field of coefficients is taken to be the complex numbers and, among other things, one studies the unitary completions of the representations (which are well understood). By taking the field of coefficients to be an extension of the p-adic numbers, we can consider completions that better capture the p-adic topology, but at the cost of losing the Haar measure and the $L^2$-norm. Nevertheless, we establish a rigidity property for a family ofÌýnormsÌý(parametrized by a Grassmannian) that areÌýinvariantÌýunder the action of the Heisenberg group.
The irreducibility of some Banach representations follows as a result. The proof uses "q-arithmetics".

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For Zoom details, please contact: martinez [at] crm.umontreal.ca

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