TY - BOOK AU - Kushner Harold J TI - Probability methods for approximations in stochastic control and for Elliptic equations T2 - Mathematics in science and engineering ; A series of monographs and textbooks U1 - B28110j392L8, L7 PY - 1977/// CY - Delhi PB - Academic Press KW - Approximation theory KW - Differential equations KW - Elliptic KW - Probabilities KW - Control theory ER -