Hostname: page-component-84b7d79bbc-l82ql Total loading time: 0 Render date: 2024-07-28T12:29:09.459Z Has data issue: false hasContentIssue false

Comparison results in second order quasilinear Dirichlet problems*

Published online by Cambridge University Press:  14 November 2011

L. E. Payne
Affiliation:
Department of Mathematics, Cornell University, Ithaca, New York, U.S.A.
J. R. L. Webb
Affiliation:
Department of Mathematics, University of Glasgow, Glasgow, Scotland, U.K.

Synopsis

In [6] and [9] two different methods are given for comparing solutions of Dirichlet problems for second order quasilinear elliptic equations on convex regions. In this paper a general comparison technique is outlined—one which contains the methods of [6] and [9] as special cases. This technique is then applied to a number of special examples, comparisons with known results are given and a number of possible extensions are indicated.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Bandle, C.. Isoperimetric Inequalities and Applications, Pitman Monograph and Studies in Mathematics 7 (New York: Pitman Advanced Publishing Program, 1980).Google Scholar
2Bernstein, S.. Uber ein geometrisches Theorem und seine Anwendungen auf die partiellen Differentialgeichungen vom elliptischen Typus. Math. Z. 26 (1927), 551588.CrossRefGoogle Scholar
3Hopf, E.. Elementare Bemerkung über die Lösung partieller Differentialgleichungen zweiter Ordnung von elliptischen Typus. Berlin Sber. Preuss. Akad. Wiss. 19 (1927), 147152.Google Scholar
4Kawohl, B.. Rearrangements and Convexity of Level Sets in PDE, Springer Lecture Notes in Math 1150 (Berlin: Springer, 1985).CrossRefGoogle Scholar
5Korevaar, N. J.. Convexity of level sets for solutions to elliptic ring problems. Comm. Partial Differential Equations 13 (1990), 541546.CrossRefGoogle Scholar
6Payne, L. E.. Bounds for solutions of a class of quasi-linear elliptic boundary value problems in terms of the torsion function. Proc. Roy. Soc. Edinburgh Sect. A 88 (1981), 251256.CrossRefGoogle Scholar
7Payne, L. E. and Philippin, G. A.. On maximum principles for a class of nonlinear second order elliptic equations. J. Differential Equations 37 (1980), 3948.Google Scholar
8Payne, L. E. and Philippin, G. A.. Some maximum principles for nonlinear elliptic equations in divergence form with applications to capillary surfaces and to surfaces of constant mean curvature. Nonlinear Anal. 3 (1979), 193211.CrossRefGoogle Scholar
9Payne, L. E. and Philippin, G. A.. Comparison theorems for a class of nonlinear elliptic boundary value problems. Nonlinear Anal. 9 (1985), 787797.Google Scholar
10Serrin, J. B.. The problem of Dirichlet for quasilinear elliptic differential equations with many independent variables. Philos. Trans. Roy. Soc. London 264 (1969), 413496.Google Scholar
11Sperb, R. P.. Maximum Principles and their Applications, Mathematics in Sci. and Engr. 157 (New York: Academic Press, 1981).Google Scholar