The solvability of the boundary value problem for the operator differential equations.
Main publications:
S. S. Mirzoev, M. Yu. Salimov, “O razreshimosti kraevoi zadachi dlya uravneniya vtorogo poryadka v gilbertovom prostranstve s operatornym koeffitsientom v kraevom uslovii”, Matem. zametki, 91:6 (2012), 861–869