Seminário Análise Funcional e Aplicações 

04/10/2002, 15:00 — 16:00 — Sala P3.10, Pavilhão de Matemática
Alexei Karlovich, Instituto Superior Técnico, U.T.L.

Norms of Toeplitz and Hankel Operators on Hardy Type Subspacesof Rearrangement-Invariant Spaces

We prove analogues of the Brown-Halmos and Nehari theorems on the norms of Toeplitz and Hankel operators, respectively, acting on subspaces of Hardy type of reflexive rearrangement-invariant spaces with nontrivial Boyd indices over the unit circle.