Oka's lemma [SEP] named after
Oka's lemma
In mathematics, Oka's lemma, proved by Kiyoshi Oka, states that in a domain of holomorphy in C, the function –log "d"("z") is plurisubharmonic, where "d" is the distance to the boundary. This property shows that the domain is pseudoconvex.
Maloyaroslavets
Maloyaroslavets () is a town and the administrative center of Maloyaroslavetsky District in Kaluga Oblast, Russia, located on the right bank of the Luzha River (Oka's basin), northeast of Kaluga, the administrative center of the oblast. Population: 21,200 (1970).
History.
It was founded in the late 14th century by Vladimir the Bold and named Yaroslavets after his son Yaroslav. In 1485, the town was annexed by the Grand Duchy of Moscow and renamed Maloyaroslavets to distinguish it from Yaroslavl.