Host Institution:

University of Newcastle

Title of Seminar:

AMSI-SigmaOpt Access Grid Optimization Seminar Series: Global Optimization of pessimistic bi-level problems

Speaker's Name:

Angelos Tsoukalas

Speaker's Institution:

RMIT University

Time and Date:

Thursday 19 November 2009 at 2:30 pm

Seminar Abstract:

We argue that the most often used optimistic formulation of bi-level problems has conceptual limitations, and we turn our attention to the alternative pessimistic formulation. Unlike its optimistic counterpart, the pessimistic formulation can have a non-closed feasible region even when the second stage feasible region is independent of first stage variables. We argue that global optimization is a necessity for bi-level problems and we provide a semi-infinite solution approach that solves (closed) epsilon-approximations of the problem. The optimal values of the approximations converge to the infimum of the original problem under a technical condition.

Seminar Convenor:

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AGR IT support:

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