unconstrained tool, gradient evaluation
g = ugr(X)
real vector, variables of the problem
real vector, gradient at X
ugr evaluates the gradien of the objective function of the current SIF problem (see usetup) at the point X, in the case where the only possible constraints are bound constraints.
Based on CUTEr authored by
Nicholas I.M. Gould - n.gould@rl.ac.uk - RAL
Dominique Orban - orban@ece.northwestern.edu - Northwestern
Philippe L. Toint - Philippe.Toint@fundp.ac.be - FUNDP
see http://hsl.rl.ac.uk/cuter-www