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Min/Max Model class

source files: minmax.lsp 

A min/max radial contour model is a specific type of radial contour model. A graphics relation is used to store length constraints between radials. These constraints are used to compute absolute lower and upper bounds for each radial. As new radial lengths are made available, these bounds are tightened via constraint propagation.

Two types of min/max models are available. The `local' model stores constraints between neighboring radials, and the `maximal' model store constraints between all pairs of radials. In experiments, the maximal model works better than the local model, but it is generally slower too.


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