Lower Bounds on the Number of Points in the Lower Spectrum of Elliptic Operators
Lower Bounds on the Number of Points in the Lower Spectrum of Elliptic Operators
Let G denote an unbounded domain of Euclidean m -space E m with regular boundary, and let L be a self-adjoint operator generated in L 2 (G) by a second order elliptic expression. We denote by S( L ) the spectrum of L, by µ the least point of the …