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In mathematical optimization, the perturbation function is any function which relates to primal and dual problems. The name comes from the fact that any such function defines a perturbation of the initial problem. In many cases this takes the form of shifting the constraints. In some texts the value function is called the perturbation function, and the perturbation function is called the bifunction. == Definition == Given two dual pairs separated locally convex spaces and . Then given the function , we can define the primal problem by : If there are constraint conditions, these can be built into the function by letting where is the indicator function. Then is a ''perturbation function'' if and only if .〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「perturbation function」の詳細全文を読む スポンサード リンク
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