TY  - JOUR
AU  - A. A. Agrachev
TI  - On the space of symmetric operators with multiple ground states
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 2011
SP  - 1
EP  - 15
VL  - 45
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_2011_45_4_a0/
LA  - ru
ID  - FAA_2011_45_4_a0
ER  -