TY  - JOUR
AU  - M. Yu. Romanova
TI  - About numerical range of semigroup's generator
JO  - Izvestiya of Saratov University. Mathematics. Mechanics. Informatics
PY  - 2012
SP  - 29
EP  - 32
VL  - 12
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ISU_2012_12_1_a4/
LA  - ru
ID  - ISU_2012_12_1_a4
ER  -