We prove the following result: if f = \varphi' is the Ghteaux derivative of a functional on a reflexive Banach space, and is demicontinuous of class (S)_+, then it has local index +1 at every isolated zero which is also a local minimum point for q•. An application to the existence of multiple solutions of nonlinear partial differential equations is given.
Publié le : 1990-07-04
Classification:
Browder index,
local minimum,
p-Laplacian,
[MATH.MATH-FA]Mathematics [math]/Functional Analysis [math.FA],
[MATH.MATH-AT]Mathematics [math]/Algebraic Topology [math.AT]
@article{hal-00002657,
author = {Kichenassamy, Satyanad},
title = {Local index of potential operators of monotone type},
journal = {HAL},
volume = {1990},
number = {0},
year = {1990},
language = {en},
url = {http://dml.mathdoc.fr/item/hal-00002657}
}
Kichenassamy, Satyanad. Local index of potential operators of monotone type. HAL, Tome 1990 (1990) no. 0, . http://gdmltest.u-ga.fr/item/hal-00002657/