10/15/03
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Zero-sum vs. Non Zero-sum
¥Zero-sum: winnings of some is exactly compensated by losses of others
Ðsum is zero for every set of strategies
¥Non zero-sum:
Ðpositive sum (mutual gain)
Ðnegative sum (mutual loss)
Ðconstant sum
Ðnonconstant sum (variable gain or loss)