Abstract
We show how to approximate a separable concave minimization problem over a general closed ground set by a single piecewise linear minimization problem. The approximation is to arbitrary 1+ε precision in optimal cost. For polyhedral ground sets in \(\mathbb{R}^n_+\) and nondecreasing cost functions, the number of pieces is polynomial in the input size and proportional to 1/log(1+ε). For general polyhedra, the number of pieces is polynomial in the input size and the size of the zeroes of the concave objective components.
We illustrate our approach on the concave-cost uncapacitated multicommodity flow problem. By formulating the resulting piecewise linear approximation problem as a fixed charge, mixed integer model and using a dual ascent solution procedure, we solve randomly generated instances to within five to twenty percent of guaranteed optimality. The problem instances contain up to 50 nodes, 500 edges, 1,225 commodities, and 1,250,000 flow variables.
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References
Nemhauser, G., Wolsey, L.: Integer and combinatorial optimization. Wiley-Interscience Series in Discrete Mathematics and Optimization. John Wiley & Sons Inc., New York (1999); Reprint of the 1988 original, A Wiley-Interscience Publication
Meyerson, A., Munagala, K., Plotkin, S.: Cost-distance: two metric network design. In: 41st Annual Symposium on Foundations of Computer Science, Redondo Beach, CA, pp. 624–630. IEEE Comput. Soc. Press, Los Alamitos (2000)
Munagala, K.: Approximation algorithms for concave cost network flow problems. PhD thesis, Stanford University, Department of Computer Science (2003)
Ahuja, R.K., Magnanti, T.L., Orlin, J.B.: Network flows, Theory, algorithms, and applications. Prentice Hall Inc., Englewood Cliffs (1993)
Hochbaum, D.S., Shanthikumar, J.G.: Convex separable optimization is not much harder than linear optimization. J. Assoc. Comput. Mach. 37, 843–862 (1990)
Balakrishnan, A., Magnanti, T.L., Wong, R.T.: A dual-ascent procedure for largescale uncapacitated network design. Oper. Res. 37, 716–740 (1989)
Korte, B., Vygen, J.: Combinatorial optimization Theory and algorithms, 2nd edn. Algorithms and Combinatorics, vol. 21. Springer, Berlin (2002)
Grötschel, M., Lovász, L., Schrijver, A.: Geometric algorithms and combinatorial optimization, 2nd edn. Algorithms and Combinatorics, vol. 2. Springer, Berlin (1993)
Bauer, H.: Minimalstellen von Funktionen und Extremalpunkte. Arch. Math. 9, 389–393 (1958)
Croxton, K.L., Gendron, B., Magnanti, T.L.: A comparison of mixed-integer programming models for nonconvex piecewise linear cost minimization problems. Management Science 49, 1268–1273 (2003)
Guisewite, G.M., Pardalos, P.M.: Minimum concave-cost network flow problems: applications, complexity, and algorithms. Ann. Oper. Res. 25, 75–99 (1990), Computational methods in global optimization
Ball, M.O., Magnanti, T.L., Monma, C.L. (eds.): Network models. Handbooks in Operations Research and Management Science, vol. 7. North-Holland Publishing Co., Amsterdam (1995)
Balakrishnan, A., Magnanti, T.L., Mirchandani, P.: Network design. In: Dell’Amico, M., Maffioli, F. (eds.) Annotated bibliographies in combinatorial optimization. Wiley-Interscience Series in Discrete Mathematics and Optimization, pp. 311–334. John Wiley & Sons Ltd., Chichester (1997), A Wiley-Interscience Publication
Goemans, M., Williamson, D.: The primal-dual method for approximation algorithms and its application to network design problems. In: Hochbaum, D.S. (ed.) Approximation algorithms for NP-hard problems, pp. 144–191. PWS Pub. Co., Boston (1997)
Schrijver, A.: Combinatorial optimization. In: Polyhedra and efficiency Paths, flows, matchings, Chapters. Algorithms and Combinatorics, vol. A24, pp. 1–38. Springer, Berlin (2003)
Bell, G.J., Lamar, B.W.: Solution methods for nonconvex network flow problems. In: Network optimization, Gainesville, FL, 1996. Lecture Notes in Econom. and Math. Systems, vol. 450, pp. 32–50. Springer, Berlin (1997)
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Magnanti, T.L., Stratila, D. (2004). Separable Concave Optimization Approximately Equals Piecewise Linear Optimization. In: Bienstock, D., Nemhauser, G. (eds) Integer Programming and Combinatorial Optimization. IPCO 2004. Lecture Notes in Computer Science, vol 3064. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-25960-2_18
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DOI: https://doi.org/10.1007/978-3-540-25960-2_18
Publisher Name: Springer, Berlin, Heidelberg
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