# Caltech/UCLA Joint Analysis Seminar

Friday, February 7, 2020
4:00pm to 4:50pm
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Local smoothing for the wave equation in $2+1$ dimensions
Ruixiang Zhang, Department of Mathematics, University of Wisconsin-Madison,

UCLA MS 6627

Sogge's local smoothing conjecture for the wave equation predicts that the solution to this equation gets smoother when averaged over time. Jointly with Larry Guth and Hong Wang, we recently proved the conjecture in $\mathbb{R}^{2+1}$. I will talk about a sharp square function estimate we proved which implies the local smoothing conjecture in dimensions $2+1$. A key ingredient in the proof is an incidence type theorem.

For more information, please contact Math Department by phone at 626-395-4335 or by email at [email protected].