Nehari manifold

The Nehari manifold is a mathematical concept used in the field of functional analysis, particularly in the context of the study of variational problems and the existence of solutions to certain types of differential equations. It is named after the mathematician Z.A. Nehari. In essence, the Nehari manifold is a subset of a function space that is utilized to find critical points of a functional, especially in the study of elliptic partial differential equations.