Počet záznamů: 1
Bounds and extremal domains for Robin eigenvalues with negative boundary parameter
- 1.0479662 - ÚJF 2018 RIV DE eng J - Článek v odborném periodiku
Antunes, P. R. S. - Freitas, P. - Krejčiřík, David
Bounds and extremal domains for Robin eigenvalues with negative boundary parameter.
Advances in Calculus of Variations. Roč. 10, č. 4 (2017), s. 357-379. ISSN 1864-8258. E-ISSN 1864-8266
Grant CEP: GA ČR(CZ) GA14-06818S
Institucionální podpora: RVO:61389005
Klíčová slova: Eigenvalue optimisation * Robin Laplacian * negative boundary parameter * Bareket's conjecture
Obor OECD: Pure mathematics
Impakt faktor: 1.676, rok: 2017
We present some new bounds for the first Robin eigenvalue with a negative boundary parameter. These include the constant volume problem, where the bounds are based on the shrinking coordinate method, and a proof that in the fixed perimeter case the disk maximises the first eigenvalue for all values of the parameter. This is in contrast with what happens in the constant area problem, where the disk is the maximiser only for small values of the boundary parameter. We also present sharp upper and lower bounds for the first eigenvalue of the ball and spherical shells. These results are complemented by the numerical optimisation of the first four and two eigenvalues in two and three dimensions, respectively, and an evaluation of the quality of the upper bounds obtained. We also study the bifurcations from the ball as the boundary parameter becomes large (negative).
Trvalý link: http://hdl.handle.net/11104/0275635
Počet záznamů: 1