Terms containing it is proved by a straight-forward adaptation of

Subject	English	Russian
math.	it is proved by a straight-forward adaptation of 3, Theorem 2	непосредственная адаптация
math.	it is proved by a straight-forward adaptation of theorem	это доказывается непосредственным применением теоремы
math.	it is proved by a straight-forward adaptation of Theorem 3.1	прямое приложение