Resultados globales: 2 registros encontrados en 0.02 segundos.
Artículos, Encontrados 2 registros
Artículos Encontrados 2 registros  
1.
Gradient systems of harmonic polynomials / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Ramírez, Oscar (Universidade Federal de Viçosa. Departamento de Matemática (Brazil))
We characterize all local phase-portraits of the finite and infinite singular points of the gradient systems defined by the real harmonic polynomials in two variables. We classify all the non-equivalent topological phase portraits of the gradient systems in the Poincaré disc defined by harmonic polynomials of degree less than five.
2020 - 10.1016/j.jde.2020.06.056
Journal of differential equations, Vol. 269, Issue 11 (November 2020) , p. 10073-10084  
2.
17 p, 381.0 KB A theoretical basis for the Harmonic Balance method / García Saldaña, Johanna Denise (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Gasull i Embid, Armengol (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
The Harmonic Balance method provides a heuristic approach for finding truncated Fourier series as an approximation to the periodic solutions of ordinary differential equations. Another natural way for obtaining these type of approximations consists in applying numerical methods. [...]
2013 - 10.1016/j.jde.2012.09.011
Journal of differential equations, Vol. 254 Núm. 1 (2013) , p. 67-80  

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