The Mathematics of Poker

[Patrick Sileo]

For a classic and very readable text on game theory, see "Games and Decisions" by R. Duncan Luce and Howard Raiffa.

From the text:

"In the domain of mixed-strategies, every zero-sum, 2-person game has at least one equilibrium [strategy] pair, and when there are several, they are equivalent and the equivalent strategies are interchangeable."