On Feb 25, 2012, at 17:52 , Steven G. Johnson wrote: > Why would a problem with more equality constraints than unknowns have a > solution?
A lot of them are just artificial because of the way we generate the problem. If I cleanup them I'll have less constraints than variables, with more involved expressions. For example: I need to constraint some variables to: x / (y + z) = x' / (y' + z'), where any of the denominators may be 0 (in which case I don't care), so they are expressed as w (y + z) = x plus w (y' + z') = x', and with basic simplifications I'm able to reduce more variables than constraints in the problem. By the way: how many variables/equality constraints can the methods (abled to deal with them) handle? _______________________________________________ NLopt-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/nlopt-discuss
