Home > Articles > Published articles > The Kato Square Root Problem follows from an extrapolation property of the Laplacian |
Date: | 2016 |
Abstract: | On a domain Ω ⊆ _ Rd we consider second-order elliptic systems in divergence-form with bounded complex coefficients, realized via a sesquilinear form with domain H1/0 (Ω) ⊆ V ⊆ H1 (Ω). Under very mild assumptions on Ω and V we show that the solution to the Kato Square Root Problem for such systems can be deduced from a regularity result for the fractional powers of the negative Laplacian in the same geometric setting. This extends earlier results of McIntosh [25] and Axelsson-Keith-McIntosh [6] to non-smooth coefficients and domains. |
Rights: | Tots els drets reservats. |
Language: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Subject: | Kato's square root problem ; Sectorial and bisectorial operators ; Functional calculus ; Quadratic estimates ; Carleson measures |
Published in: | Publicacions matemàtiques, Vol. 60 Núm. 2 (2016) , p. 451-483 (Articles) , ISSN 2014-4350 |
33 p, 487.6 KB |