TY  - JOUR
AU  - Elena E. Berdysheva
AU  - Maria A. Filatova
TI  - On the best approximation of the infinitesimal generator of a contraction semigroup in a Hilbert space
JO  - Ural mathematical journal
PY  - 2017
SP  - 40
EP  - 45
VL  - 3
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/UMJ_2017_3_2_a5/
LA  - en
ID  - UMJ_2017_3_2_a5
ER  -