TY  - JOUR
AU  - A. D. Gadzhiev
TI  - The convergence problem for a sequence of positive linear operators on unbounded sets, and theorems analogous to that of P.\,P.~Korovkin
JO  - Doklady Akademii Nauk
PY  - 1974
SP  - 1001
EP  - 1004
VL  - 218
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1974_218_5_a0/
LA  - ru
ID  - DAN_1974_218_5_a0
ER  -