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APRG Seminar

Title: Lebesgue space estimates for spherical maximal functions on Heisenberg groups
Speaker: Rajula Srivastava (University of Wisconsin at Madison, USA)
Date: 20 October 2021
Time: 6:30 pm
Venue: Microsoft Teams (online)

We discuss $L^p\to L^q$ estimates for local maximal operators associated with dilates of codimension two spheres in Heisenberg groups, sharp up to endpoints. The proof shall be reduced to estimates for standard oscillatory integrals of Carleson–Sjölin–Hörmander type, relying on the maximal possible number of nonvanishing curvatures for a cone in the fibers of the associated canonical relation. We shall also discuss a new counterexample which shows the sharpness of one of the edges in the region of boundedness. Based on joint work with Joris Roos and Andreas Seeger.

The video of this talk is available on the IISc Math Department channel.


Contact: +91 (80) 2293 2711, +91 (80) 2293 2265 ;     E-mail: chair.math[at]iisc[dot]ac[dot]in
Last updated: 26 Oct 2021