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Location, scheduling and design problems are assignment type
problems with quadratic cost functions and occur in many contexts
stretching from spatial economics via plant and office layout
planning to VLSI design and similar prob lems in high-technology
production settings. The presence of nonlinear inter action terms
in the objective function makes these, otherwise simple, problems
NP hard. In the first two chapters of this monograph we provide a
survey of models of this type and give a common framework for them
as Boolean quadratic problems with special ordered sets (BQPSs).
Special ordered sets associated with these BQPSs are of equal
cardinality and either are disjoint as in clique partitioning
problems, graph partitioning problems, class-room scheduling
problems, operations-scheduling problems, multi-processor assign
ment problems and VLSI circuit layout design problems or have
intersections with well defined joins as in asymmetric and
symmetric Koopmans-Beckmann problems and quadratic assignment
problems. Applications of these problems abound in diverse
disciplines, such as anthropology, archeology, architecture,
chemistry, computer science, economics, electronics, ergonomics,
marketing, operations management, political science, statistical
physics, zoology, etc. We then give a survey of the traditional
solution approaches to BQPSs. It is an unfortunate fact that even
after years of investigation into these problems, the state of
algorithmic development is nowhere close to solving large-scale
real life problems exactly. In the main part of this book we follow
the polyhedral approach to combinatorial problem solving because of
the dramatic algorith mic successes of researchers who have pursued
this approach."
Location, scheduling and design problems are assignment type
problems with quadratic cost functions and occur in many contexts
stretching from spatial economics via plant and office layout
planning to VLSI design and similar prob lems in high-technology
production settings. The presence of nonlinear inter action terms
in the objective function makes these, otherwise simple, problems
NP hard. In the first two chapters of this monograph we provide a
survey of models of this type and give a common framework for them
as Boolean quadratic problems with special ordered sets (BQPSs).
Special ordered sets associated with these BQPSs are of equal
cardinality and either are disjoint as in clique partitioning
problems, graph partitioning problems, class-room scheduling
problems, operations-scheduling problems, multi-processor assign
ment problems and VLSI circuit layout design problems or have
intersections with well defined joins as in asymmetric and
symmetric Koopmans-Beckmann problems and quadratic assignment
problems. Applications of these problems abound in diverse
disciplines, such as anthropology, archeology, architecture,
chemistry, computer science, economics, electronics, ergonomics,
marketing, operations management, political science, statistical
physics, zoology, etc. We then give a survey of the traditional
solution approaches to BQPSs. It is an unfortunate fact that even
after years of investigation into these problems, the state of
algorithmic development is nowhere close to solving large-scale
real life problems exactly. In the main part of this book we follow
the polyhedral approach to combinatorial problem solving because of
the dramatic algorith mic successes of researchers who have pursued
this approach."
This book offers a comprehensive treatment of the exercises and case studies as well as summaries of the chapters of the book "Linear Optimization and Extensions" by Manfred Padberg. It covers the areas of linear programming and the optimization of linear functions over polyhedra in finite dimensional Euclidean vector spaces.Here are the main topics treated in the book: Simplex algorithms and their derivatives including the duality theory of linear programming. Polyhedral theory, pointwise and linear descriptions of polyhedra, double description algorithms, Gaussian elimination with and without division, the complexity of simplex steps. Projective algorithms, the geometry of projective algorithms, Newtonian barrier methods. Ellipsoids algorithms in perfect and in finite precision arithmetic, the equivalence of linear optimization and polyhedral separation. The foundations of mixed-integer programming and combinatorial optimization.
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