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Mitsunori MAKINO Masahide KASHIWAGI Shin'ichi OISHI Kazuo HORIUCHI
An estimation method of region is presented, in which a solution path of the so-called Newton type homotopy equation in guaranteed to exist, it is applied to a certain class of uniquely solvable nonlinear equations. The region can be estimated a posteriori, and its upper bound also can be estimated a priori.