Nick Fryganiotis
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Nick Fryganiotisさんがコメントを作成しました:
Ok, let us consider that $x \in {0,1,\dots, W\}, the acceptable values for the integer variables ($W$ may be equal to $\infty$). The relaxation mechanism transforms the aforementioned set into a co...
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Nick Fryganiotisさんがコメントを作成しました:
Hi Ryuta,Thank you for answering. What i am trying to figure out is, if \(x^*\) is the optimal solution of an integer program with a convex objective function, does there exist a standard relation ...
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Nick Fryganiotisさんが投稿を作成しました:
Integer Program - LP relaxation for convex objective function
回答済みIs there any way to bound for each decision variable the difference of the optimal solution of the integer program and the linear program relaxation solution, in case of convex functions?
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Nick Fryganiotisさんが投稿を作成しました:
Product of integer and binary linearization
回答済みHi, consider the product of a binary variable x, with an integer variable y. How to efficiently linearize this term? Also is it is better to linearize this term, or gurobi solver can handle it? Th...
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Nick Fryganiotisさんがコメントを作成しました:
Hi Riley, thanks for the answer. In my source code m.update() is prior to m.getQConstrs(). - Nikos
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Nick Fryganiotisさんが投稿を作成しました:
MILP bilinear constraints
ユーザーの入力を待っています。I have a mixed integer linear program. My objective function involves the sumation of binary variables and quadratic terms of continuous variables. When i execute the model optimize function i get ...
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Nick Fryganiotisさんが投稿を作成しました:
Douple vtype for variable created by addVars
回答済みCould i define 3-index variable using addVars where for the first index when it's value is less than 2 it will be a binary variable, otherwise it will be a continuous varible.
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Nick Fryganiotisさんが投稿を作成しました:
Integer division in integer programming
回答済みIn case of an integer programming problem, i would like to add in the objective function an integer division of a decision variable with a constant number. Is there any efficient way to implent thi...
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Nick Fryganiotisさんがコメントを作成しました:
Thanks for the comment. I have seen the article you mention. The problem is that in my own case, the variable $z_s(t)$ is upper and lower bounded. I am not quite sure if that means that i need two ...
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Nick Fryganiotisさんが投稿を作成しました:
Conditional stament in Gurobi
回答済みConsider a binary variable \(x_s(t)\), and a continuous variable \(z_s(t) = t - t_s\), where \(t_s\) is a known constant. We define a conditional variable \(sr_s(t) = x_s(t)\) if \(0 \leq z_s(t) < ...