Variable Hardy and Hardy-Lorentz spaces and applications in Fourier analysis

Ferenc Weisz


We summarize some results about the variable Hardy and Hardy-Lorentz
spaces Hp()(Rd) and Hp();q(Rd) and about the -summability of multi-dimensional
Fourier transforms. We prove that the maximal operator of the -means is
bounded from Hp()(Rd) to Lp()(Rd) and from Hp();q(Rd) to Lp();q(Rd). This
implies some norm and almost everywhere convergence results for the Riesz,
Bochner-Riesz, Weierstrass, Picard and Bessel summations.

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