Boundary Value Problems for Elliptic PDEs and the Morse Index Theorem in Multi-Dimensions.

Abstract: A symplectic view of linearized elliptic problems leads naturally to the formulation of an appropriate Maslov Index. This is well-known in one space dimension and is generalized here to domains in higher space dimensions. The result is a Morse Index type theorem that applies on bounded domains with any prescribed (symplectic) boundary conditions.