On the principal eigenvalue of elliptic second order differential operators. (English) Zbl 0447.35030

Proc. int. Symp. on stochastic differential equations, Kyoto 1976, 41-47 (1978).


35J25 Boundary value problems for second-order elliptic equations
35P05 General topics in linear spectral theory for PDEs
60J35 Transition functions, generators and resolvents
60J60 Diffusion processes
35P15 Estimates of eigenvalues in context of PDEs
35J20 Variational methods for second-order elliptic equations
60J45 Probabilistic potential theory