TY - BOOK AU - Donner,Klaus TI - Extension of positive operators and Korovkin theorems T2 - Lecture notes in mathematics SN - 0387111832 (U.S. : pbk.) PY - 1982/// CY - Berlin , New York PB - Springer-Verlag KW - Linear operators KW - Positive operators KW - Banach lattices KW - Convergence N1 - Includes index; Bibliography: p. [177]-181 ER -