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This paper provides an introductory survey of a class of optimization problems known as bilevel programming. We motivate this class through a simple application, and then proceed with the general formulation of bilevel programs. We consider various cases (linear, linear-quadratic, nonlinear),...
In this paper we propose a new rule for removal of population members. We tested the new approach for solving the Quadratic Assignment Problem with excellent results.
The paper addresses the open-shop scheduling problem with unit-time operations and nondecreasing symmetric objective function depending on job completion times. We construct two schedules, one being optimal for any symmetric convex function, the other one for any symmetric concave function. Both...
Upper bounds for the length of a longest (circuit) cycle without chords in a (directed) graph are given in terms of the rank of the adjacency matrix and in terms of its eigenvalues.
We present the main results in the author’s Ph.D. thesis (Iori 2004), defended at the University of Bologna in April 2004 and supervised by S. Martello. The thesis is written in English and is available from the author upon request. It proposes exact and metaheuristic algorithms for solving some...
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