Seminar series
Date
Thu, 07 Mar 2019
12:00
12:00
Location
L4
Speaker
Óscar Domínguez Bonilla
Organisation
Universidad Complutense de Madrid
Motivated by recent problems on mixing flows, it is useful to characterize Besov spaces via oscillation of functions (averages) and minimization problems for bounded variation functions (Bianchini-type norms). In this talk, we discuss various descriptions of Besov spaces in terms of different kinds of averages, as well as Bianchini-type norms. Our method relies on the K-functional of the theory of real interpolation. This is a joint work with S. Tikhonov (Barcelona).