A critical parabolic Sobolev embedding via Littlewood-Paley decomposition

Details A critical parabolic Sobolev embedding via Littlewood-Paley decomposition A critical parabolic Sobolev embedding via Littlewood-Paley decomposition

2009-08-13

arxiv.org/abs/0908.1866v1

Mathematics

Functional Analysis

17 pages

Scientific paper

In this paper, we show a parabolic version of the Ogawa type inequality in Sobolev spaces. Our inequality provides an estimate of the $L^{\infty}$ norm of a function in terms of its parabolic $BMO$ norm, with the aid of the square root of the logarithmic dependency of a higher order Sobolev norm. The proof is mainly based on the Littlewood-Paley decomposition and a characterization of parabolic $BMO$ spaces.

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