New estimates for the Beurling-Ahlfors operator on differential forms

Details New estimates for the Beurling-Ahlfors operator on differential forms New estimates for the Beurling-Ahlfors operator on differential forms

2009-01-04

arxiv.org/abs/0901.0345v1

J. Operator Theory 65 (2011), no. 2, 307--324

Mathematics

Classical Analysis and ODEs

v1: 17 pages

Scientific paper

We establish new $p$-estimates for the norm of the generalized Beurling--Ahlfors transform $\mathcal{S}$ acting on form-valued functions. Namely, we prove that $\norm{\mathcal{S}}_{L^p(\R^n;\Lambda)\to L^p(\R^n;\Lambda)}\leq n(p^{*}-1)$ where $p^*=\max\{p, p/(p-1)\},$ thus extending the recent Nazarov--Volberg estimates to higher dimensions. The even-dimensional case has important implications for quasiconformal mappings. Some promising prospects for further improvement are discussed at the end.

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