Seminars usually take place either at
UPV/EHU, Seminar Room of the Mathematics Department, Facultad de Ciencias, on Thursdays at 12:00, or
BCAM, Seminar Room, on Thursdays at 17:00.
Some seminars were recorded, and the videos can be found together with the description of the seminar on the subpage related to the year the talk happened. You can also find them here.
To subscribe to the seminar mailing list, contact one of the organizers.
As of November 13th, 2025, the count of talks reached 271.
BCAM, Thursday, November 20th, 2025, 17:00 - 18:00
Title: Endpoint estimates for the fractal circular maximal function and related local smoothing
Luz Roncal - BCAM
Abstract: The spherical maximal function is a relevant object in harmonic analysis, connected to the solutions of the wave equation and related smoothing properties, and variants of it have been widely studied in the literature. In recent times, there has been an increasing interest in understanding sharp forms of L^p-L^q estimates for the spherical maximal function when the supremum is taken over dilation sets of fractal dimensions of different nature. In this talk we will prove missing endpoint estimates for the fractal spherical maximal function which were open when d=2, and study closely related L^p-L^q local smoothing estimates for the wave operator over fractal dilation sets. Our approach relies on bilinear restriction estimates for the cone due to T. Wolff and T. Tao.
This is joint work with Sanghyuk Lee, Feng Zhang, and Shuijiang Zhao.
UPV/EHU, Thursday, November 27th, 2025, 12:00 - 13:00
Title: TBA
Linfei Zheng - BCAM
TBA
TBA, Thursday, December 4th, 2025, TBA
Title: TBA
Alberto Ruiz
TBA
TBA, Thursday, December 11th, 2025, TBA
Title: TBA
Didier Pilot - Bergen
TBA
TBA, Thursday, December 18th, 2025, TBA
Title: TBA
Tan Jin - Chinese University of Hong Kong
TBA