Newton's method in the context of gradients.
Karatson, Janos, Neuberger, John W. (2007)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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Karatson, Janos, Neuberger, John W. (2007)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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Argyros, Ioannis K. (2006)
Revista Colombiana de Matemáticas
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Uko, Livinus U., Velásquez Ossa, Raúl Eduardo (2001)
Revista Colombiana de Matemáticas
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Gwoździewicz, Janusz (2008)
Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
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F. Presas (2001)
Extracta Mathematicae
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Denk, Robert, Racke, Reinhard (2006)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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Alexander Esterov (2005)
Revista Matemática Complutense
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A formula of Matsuo Oka (1990) expresses the Milnor number of a germ of a complex analytic map with a generic principal part in terms of the Newton polyhedra of the components of the map. In this paper this formula is generalized to the case of the index of a 1-form on a local complete intersection singularity (Theorem 1.10, Corollaries 1.11, 4.1). In particular, the Newton polyhedron of a 1-form is defined (Definition 1.6). This also simplifies the Oka formula in some particular cases...
Pietrus, Alain (2000)
Revista Colombiana de Matemáticas
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García Barroso, Evelia R., Lenarcik, Andrzej, Płoski, Arkadiusz (2007)
Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
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Evelia R. García Barroso, Janusz Gwoździewicz (2010)
Annales de l’institut Fourier
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In this paper we characterize, in two different ways, the Newton polygons which are jacobian Newton polygons of a plane branch. These characterizations give in particular combinatorial criteria of irreducibility for complex series in two variables and necessary conditions which a complex curve has to satisfy in order to be the discriminant of a complex plane branch.