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Vértices, curva focal e superfície focal de curvas no espaço
(Universidade Federal de Santa MariaBRMatemáticaUFSMPrograma de Pós-Graduação em Matemática, 2013-03-19)
The focal surface of a curve γ in the Euclidean 3-space is defined as the envelope of the normal
planes of γ. The focal surface of γ is singular along a curve Cγ, called the focal curve or generalized
evolute. This curve ...
Puntos focales nacionales = National focal points
(CEPAL, 1977)
New and renewable energy statistics in the Caribbean
(Caribbean Energy Information System, 2001, 2011-09-06)
COMPARISON RESULTS FOR CONJUGATE AND FOCAL POINTS IN SEMI-RIEMANNIAN GEOMETRY VIA MASLOV INDEX
(PACIFIC JOURNAL MATHEMATICS, 2009)
We prove an estimate on the difference of Maslov indices relative to the choice of two distinct reference Lagrangians of a continuous path in the Lagrangian Grassmannian of a symplectic space. We discuss some applications ...
Geometria Diferencial do conjunto focal
(Universidade Estadual Paulista (Unesp), 2018-02-08)
Seja S uma superf´ıcie regular em R3 sem pontos parab´olicos. O conjunto focal de S ´e o lugar geom´etrico dos centros das esferas que possuem contato degenerado com S em cada ponto. Tal contato ´e medido pelas singularidades ...
Characterization of the evolutes of planes curvesCaracterización de las evolutas de curvas planas
(Pereira : Universidad Tecnológica de PereiraFacultad de Ciencias Básicas, 2011)
PETSTATS : Petroleum energy statistics in the Caribbean, 1992-1998
(Caribbean Energy Information System, 2001, 2011-09-06)