Ooops, I forgot Christian's book (which is freely available as a PDF): __Programming_Constraint_Services__
But, that might be a little dated. I think Gecode is more focused on the practial implementation of efficient propagation and less about the concept of Spaces, which that book concentrates on. I *believe* there's an expert lurking around on this list that might be in a better position to offer an opinion on that, though ... Regards, Chris _______________________________________________ Gecode users mailing list [EMAIL PROTECTED] https://www.gecode.org/mailman/listinfo/gecode-users
