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A smoothing projected Newton-type method for semismooth equations with bound constraints
This paper develops a smoothing algorithm to
solve a system of constrained equations. Compared with the
traditional methods, the new method does not need the continuous
differentiability assumption for the corresponding merit function.
By using some perturbing technique and suitable strategy of the
chosen search direction, we find that the new method not only
keeps the strict positivity of the smoothing variable at any
non-stationary point of the corresponding optimization problem,
but also enjoys global convergence and locally superliner
convergence. The former character is the key requirement for
smoothing methods. Some numerical examples arising from
semi-infinite programming (SIP) show that the new algorithm is
promising.