Local solvability for positive combinations of generalized sub-Laplacians on the Heisenberg group
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- by Detlef Müller and Zhenqiu Zhang PDF
- Proc. Amer. Math. Soc. 129 (2001), 3101-3107 Request permission
Abstract:
As one step in a program to understand local solvability of complex coefficient second order differential operators on the Heisenberg group in a complete way, solvability of operators of the form $\Delta _{S,\alpha }=\Delta _S +i\alpha U$, where the leading term $\Delta _S$ is a “positive combination of generalized and degenerate generalized sub-Laplacians”, has been studied in a recent article by M. Peloso, F. Ricci and the first-named author (J. Reine Angew Math. 513 (1999)). It was shown that there exists a discrete set of “critical” values $E\subset \mathbb {C}$, such that solvability holds for $\alpha \not \in E$. The case $\alpha \in E$ remained open, and it is the purpose of this note to close this gap. Our results extend corresponding results in another article by the above-mentioned authors (J. Funct. Anal. 148 (1997)), by means of an even simplified approach which should allow for further generalizations.References
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Additional Information
- Detlef Müller
- Affiliation: Mathematisches Seminar, C. A. - Universität Kiel, Ludewig-Meyn-Str. 4, D-24098 Kiel, Germany
- Email: mueller@math.uni-kiel.de
- Zhenqiu Zhang
- Affiliation: Department of Mathematics, Tianjin University 300072, Tianjin, People’s Republic of China
- Email: zqzhangmath@yahoo.com
- Received by editor(s): February 3, 2000
- Published electronically: February 15, 2001
- Communicated by: Christopher D. Sogge
- © Copyright 2001 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 129 (2001), 3101-3107
- MSC (2000): Primary 22E30; Secondary 35A07
- DOI: https://doi.org/10.1090/S0002-9939-01-05930-5
- MathSciNet review: 1840117