Numerical Invariants
Mostrando 1-6 de 6 artigos, teses e dissertações.
-
1. CALCULUS OF AFFINE STRUCTURES AND APPLICATIONS FOR ISOSURFACES / CÁLCULO DE ESTRUTURAS AFINS E APLICAÇÃO ÀS ISOSSUPERFÍCIES
Differential Geometry provides a set of measures invariant under a set of transformations, in particular rigid, affine, and projective. The invariants by rigid motions are using almost all applications of computer graphics and geometric modeling. The affine case, since it is more general, allows to extend these tools. In this work, geometric properties are p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2011
-
2. Seasonal cusp radiation belt on dayside magnetosphere
The possibility of quasi-stable trapping of charged particles of hundreds keV to MeV energy on the frontside Earth magnetosphere is explored in by numerical modeling of the single particle orbits in the geomagnetic field utilizing empirical Tsyganenko magnetic field model. Due to solar wind pressure the remote magnetic field lines on the frontside of the mag
Brazilian Journal of Physics. Publicado em: 2004-12
-
3. Os tipos estáveis e multiplicidades de germes quase homogêneos de Cn em Cn / The stable types and multiplicities of weighted homogeneous germs from Cn to Cn
A determinação dos invariantes numéricos associados a germes de aplicações diferenciáveis é uma ferramenta muito útil no estudo de problemas de equisingularidade em famílias. Em geral, estes invariantes são obtidos algebricamente através de esquemas r-dimensionais, que surgem nos tipos estáveis de uma perturbação estável do germe. Neste trabal
Publicado em: 2004
-
4. Symplectic integrators revisited
This paper is a survey on Symplectic Integrator Algorithms (SIA): numerical integrators designed for Hamiltonian systems. As it is well known, n degrees of freedom Hamiltonian systems have an important property: their ows preserve not only the total volume of the phase space, which is only one of the Poincaré invariants, but also the volume of sub-spaces le
Brazilian Journal of Physics. Publicado em: 2002-12
-
5. Statistical geometry in sequence space: a method of quantitative comparative sequence analysis.
A statistical method of comparative sequence analysis that combines horizontal and vertical correlations among aligned sequences is introduced. It is based on the analysis mainly of quartet combinations of sequences considered as geometric configurations in sequence space. Numerical invariants related to relative internal segment lengths are assigned to each
-
6. Topologically driven swelling of a polymer loop
Numerical studies of the average size of trivially knotted polymer loops with no excluded volume were undertaken. Topology was identified by Alexander and Vassiliev degree 2 invariants. Probability of a trivial knot, average gyration radius, and probability density distributions as functions of gyration radius were generated for loops of up to N = 3,000 segm
National Academy of Sciences.