Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Anais da ABC (AABC) (2) Autor Llibre,Jaume (2) Garcia,Ronaldo (1) Messias,Marcelo (1) Sotomayor,Jorge (1) Palavra-chave Canal surfaces (1) Infinite heteroclinic loops (1) Periodic orbits (1) Principal curvature lines (1) Riccati equation (1) Symmetric systems (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2007 (1) 2006 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Large amplitude oscillations for a class of symmetric polynomial differential systems in R³ Anais da ABC (AABC) Llibre,Jaume; Messias,Marcelo. In this paper we study a class of symmetric polynomial differential systems in R³, which has a set of parallel invariant straight lines, forming degenerate heteroclinic cycles, which have their two singular endpoints at infinity. The global study near infinity is performed using the Poincaré compactification. We prove that for all n <FONT FACE=Symbol>Î</FONT> N there is epsilonn > 0 such that for 0 < epsilon < epsilonn the system has at least n large amplitude periodic orbits bifurcating from the heteroclinic loop formed by the two invariant straight lines closest to the x-axis, one contained in the half-space y > 0 and the other in y < 0. Tipo: Info:eu-repo/semantics/article Palavras-chave: Infinite heteroclinic loops; Periodic orbits; Symmetric systems. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000400001 Lines of principal curvature on canal surfaces in R³ Anais da ABC (AABC) Garcia,Ronaldo; Llibre,Jaume; Sotomayor,Jorge. In this paper are determined the principal curvatures and principal curvature lines on canal surfaces which are the envelopes of families of spheres with variable radius and centers moving along a closed regular curve in R³. By means of a connection of the differential equations for these curvature lines and real Riccati equations, it is established that canal surfaces have at most two isolated periodic principal lines. Examples of canal surfaces with two simple and one double periodic principal lines are given. Tipo: Info:eu-repo/semantics/article Palavras-chave: Riccati equation; Principal curvature lines; Canal surfaces. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000300002 Registros recuperados: 2 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco