Zermelo's theorem

English

Etymology

Named after Ernst Zermelo.

Proper noun

Zermelo's theorem

1. (game theory) A theorem about finite two-person games of perfect information in which the players move alternately and chance does not affect the decision-making process. It states that if the game cannot end in a draw, then one of the two players must have a winning strategy, i.e. force a win.
2. (set theory) The well-ordering theorem.