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A Library of Mixed-Integer and Continuous Nonlinear Programming Instances

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This page illustrates some statistics about the MINLPLib.

Scatter plots: Area of bubble corresponds to instance (nonlinear) density.
Density in left scatter plot is (#nonzeros in objective and jacobian) / (#vars * (#cons + 1)).
Density in right scatter plot is (#nonlinear nonzeros in objective and jacobian) / (#nonlinear vars * (#nonlinear cons + 1 if objective is nonlinear)).
Densities below 0.05 are shown as 0.05.

Trusted gap is gap between primal bound and a dual bound that has been confirmed by at least 2 other solvers.

Scatter plots: Area of bubble corresponds to trusted gap (projected onto [0.01,1.0]).

Last updated: 2018-01-13
Git hash: e280d95a