Geodesic
Numerical continuation of solution at a singular point of high codimension for systems of nonlinear algebraic or transcendental equations
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 56 (2016) no. 9, pp. 1571-1585 Cet article a éte moissonné depuis la source Math-Net.Ru

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Numerical continuation of solution through certain singular points of the curve of the set of solutions to a system of nonlinear algebraic or transcendental equations with a parameter is considered. Bifurcation points of codimension two and three are investigated. Algorithms and computer programs are developed that implement the procedure of discrete parametric continuation of the solution and find all branches at simple bifurcation points of codimension two and three. Corresponding theorems are proved, and each algorithm is rigorously justified. A novel algorithm for the estimation of errors of tangential vectors at simple bifurcation points of a finite codimension $m$ is proposed. The operation of the computer programs is demonstrated by test examples, which allows one to estimate their efficiency and confirm the theoretical results. 
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S. D. Krasnikov; E. B. Kuznetsov. Numerical continuation of solution at a singular point of high codimension for systems of nonlinear algebraic or transcendental equations. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 56 (2016) no. 9, pp. 1571-1585. http://geodesic.mathdoc.fr/item/ZVMMF_2016_56_9_a3/

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