(set theory) The axiom that the power set of any set exists and is a valid set, which appears in the standard axiomatisation of set theory, ZFC.

(set theory) An early and influential axiomatisation of set theory.

Synonym of put pen to paper

(chiefly UK) To talk about improving the world.

Synonym of get the ball rolling.

present participle of set the world on fire

Alternative form of turn one's hand to

Alternative form of set one's heart on

Alternative form of put the cat among the pigeons

(idiomatic, archaic) Synonym of put one's shoulder to the wheel