▁responsible ▁for ▁their ▁parents ", ▁M kh itar ▁Dj rb ash ian ▁could ▁en roll ▁in ▁Y ere van ▁State ▁University , ▁where ▁his ▁scientific ▁activities ▁were ▁encourag ed ▁by ▁Prof . ▁Art ash es ▁Shah in ian , ▁a ▁tal ented ▁teacher ▁who ▁directed ▁his ▁pup ils ▁mainly ▁to ▁Appro xim ation ▁theory . ▁ ▁M kh itar ▁Dj rb ash ian ▁was ▁greatly ▁influenced ▁by ▁the ▁results ▁of ▁R olf ▁Ne van lin na ▁in ▁Complex ▁Analysis , ▁which ▁he ▁studied ▁att ending ▁lect ures ▁delivered ▁by ▁M st is lav ▁K eld y sh ▁ ▁at ▁Y ere van ▁State ▁University ▁in ▁ 1 9 4 4 . ▁This ▁directed ▁his ▁scientific ▁research ▁to ▁the ▁field ▁of ▁Complex ▁Analysis . ▁ ▁Under ▁the ▁super vision ▁of ▁Prof . ▁Art ash es ▁Shah in ian , ▁M kh itar ▁Dj rb ash ian ▁was ▁the ▁first ▁to ▁defend ▁a ▁C andid ate ▁of ▁Sciences ▁Th esis ▁in ▁mathematics ▁at ▁Y ere van ▁State ▁University ▁in ▁ 1 9 4 5 , ▁with ▁some ▁new , ▁original ▁results ▁on ▁weight ed ▁Ne van lin na ▁classes ▁of ▁mer omorphic ▁functions ▁( see ▁Section ▁ 2 1 6 ▁in ▁). ▁In ▁ 1 9 4 9 ▁M kh itar ▁Dj rb ash ian ▁def ended ▁his ▁Doctor ▁of ▁Science ▁Th esis ▁in ▁Moscow ▁State ▁University ▁with ▁excellent ▁references ▁from ▁Prof . ▁M st is lav ▁K eld y sh , ▁Prof . ▁Alexander ▁G elf ond ▁ ▁and ▁Prof . ▁Alex ei ▁Mark