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SIMBa (confinat): There are no Banach function spaces, only weighted L2

SIBMa

El proper dimarts, 23 de juny, se celebrarà una nova xerrada —en format virtual— del Seminari Informal de Matemàtiques de Barcelona (SIMBa).

Speaker: Sergi Baena i Miret.
Universitat: Universitat de Barcelona.

Data: Tuesday, 23th of June
Hora: 12:00, virtual coffee break (bring your coffee); 12:20, talk.
Lloc: Zoom meeting. A link will be sent via email, please sign up in our web.
Idioma: English

Títol: There are no Banach function spaces, only weighted L^{2}
Resum: An important property of the A_{p} weights is the extrapolation theorem of Rubio de Francia. It was announced in 1982 and givenwith a detailed proof in 1984, both by J.L. Rubio de Francia. Inits original version, reads as follows: if T is a sublinear operator which satisfies the strong type boundedness:

T: L^{2}(v) \rightarrow L^{2}(v)

for every weight v \in A_{2} with constant only depending onv, then for 1<p<\infty,

T: L^{p}(v) \rightarrow L^{p}(v)

is bounded for every v \in A_{p}, with constant depending only on v We will make a review of some of the different versions that have been appeared since then.

Si voleu estar al cas de les xerrades previstes, podeu consultar el calendari. Si voleu proposar una xerrada, ompliu el formulari. Si voleu contactar amb els responsables podeu escriure un missatge a seminari(dot)simba(at)ub(dot)edu.