In set theory, a branch of mathematics, determinacy is the study of under what circumstances one or the other player of a game must have a winning strategy, and the consequences of the existence of such strategies. ==Basic notions== ===Games=== The first sort of game we shall consider is the two-player game of perfect information of length ω, in ...
• (n.) Determinateness.
De·ter'mi·na·cy noun Determinateness. [ R.]