Michael Trick

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Michael Trick commented on a post on Blogger.

Roy's strategy (as given) is not quite tit-for-tat. Tit-for-tat would include a promise to start cooperating again after defecting if opponent cooperated. http://www.iterated-prisoners-dilemma.net/prisoners-dilemma-strategies.shtml calls Roy's strategy "grudger". Though we can't see what they really intended given the outcome.

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Michael Trick commented on a post on Blogger.

Any 2-3PM or do you have a particular time zone in mind? UK I would guess?

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Nope: not >=. How about x_j + 1 on the LHS? With >=. Or maybe I should just work it out before posting.

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Are these constraints (in the x variables) what you wanted? Take K=3 and let x_1, x_2, x_3 = 1 and the rest zero. You have a constraint 2x_3 <= x_2+x_4 which doesn't quite work. Maybe >= ?

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A new post on creating optimal ecological structures. I was thinking of exploring the robustness of optimal designs, but the panda story overwhelmed me.

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International Transactions in Operational Research is now an ISI journal

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