Mathematical Programming

, Volume 156, Issue 1–2, pp 101–123 | Cite as

Error bounds for mixed integer linear optimization problems

Full Length Paper Series A


We introduce computable a priori and a posteriori error bounds for optimality and feasibility of a point generated as the rounding of an optimal point of the LP relaxation of a mixed integer linear optimization problem. Treating the mesh size of integer vectors as a parameter allows us to study the effect of different “granularities” in the discrete variables on the error bounds. Our analysis mainly bases on a global error bound for mixed integer linear problems constructed via a so-called grid relaxation retract. Relations to proximity results, the integer rounding property, and binary analytic problems are highlighted.


Global error bound Rounding Grid relaxation retract Granularity Hoffman constant 

Mathematics Subject Classification

90C11 90C10 90C31 90C05 



The author is grateful to the anonymous referees for their precise and substantial remarks, and to Immanuel Bomze, Peter Gritzmann and Guoyin Li for helpful comments on an earlier version of this manuscript.


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Copyright information

© Springer-Verlag Berlin Heidelberg and Mathematical Optimization Society 2015

Authors and Affiliations

  1. 1.Institute of Operations ResearchKarlsruhe Institute of Technology (KIT)KarlsruheGermany

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