Specificity Ofanti-kidne Yantibod Ydetermined B Y Its Effect upon Tissue Culture Explants

for all mixed strategies Al, . ., ,, and i = 1, . . ., n in an n-person game r for all possible assignments of the pay-offfunction h is that r have total recall. Theorem 1 generalizes the theorem of von Neumann which asserts that a zero-sum two-person game with perfect information is strictly determined. It is proved by the same inductive device with a slight variation due to the absence of the minorant and majorant games in the general n-person case. Theorem 2 enables us to replace mixed strategies by behavior strategies in games with total recall and has many computational ramifications. The proofs of both of the theorems and further considerations of extensive games will be published elsewhere.