3

None if the axiom is to be on preferences, as any smooth utility representation can be monotone transformed into a non-smooth utility function.


3

Although I don't have the book here, I am quite certain that mixed strategies are already present in the book from 1944. I believe that I have read somewhere the claim that "mixed strategies" where actually introduced in an earlier version of the book (published in German in 1928, says Wikipedia). However, what I have read mostly is the claim that ...


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