Unformatted text preview: ± . 1 , ± . 2 as well as larger ones like ± 1 , ± 2. (c) Solve the dual linear program using AMPL, and compare your answer with the rates of change in part (b). Again, you need to write a model ﬁle that represents the dual of the problem you modelled in (a); the data ﬁle can be the same. (d) Use AMPL to calculate the “marginal values” associated with the constraints of the primal problem. (See page 17 of the AMPL book.) Compare your answers with part (c). (e) (Not to be turned in.) Think about why the linear behavior of the objective function for small changes no longer holds when larger changes are made. 1...
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 Fall '08
 TODD
 Operations Research, Linear Programming, Optimization, Dual problem, linear program

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