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This algorithm combines the advantages of both trust region
and line-search worlds. We are using a trust region
for his robustness and speed when confronted to highly non-linear
objective function. We are using line-search techniques
because of their superiority when confronted to non-linear
constraints. When no non-linear constraints are active, we are
using the Moré and Sorensen algorithm [CGT00c,MS83] which
gives us high accuracy in step calculation and which leads to very
fast convergence.
Frank Vanden Berghen
2004-04-19