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Moments of the doubly truncated selection elliptical distributions with emphasis on the unified multivariate skew-t distribution
(ELSEVIER INC, 2022)
In this paper, we compute doubly truncated moments for the selection elliptical class of distributions, including some multivariate asymmetric versions of well-known elliptical distributions, such as the normal, Student's ...
Gross misinterpretation of a conditionally solvable eigenvalue equation
(World Scientific, 2020-11-10)
We solve an eigenvalue equation that appears in several papers about a wide range of physical problems. The Frobenius method leads to a three-term recurrence relation for the coefficients of the power series that, under ...
Modelos não lineares truncados mistos para locação e escala
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Estatística - PPGEs, 2015-01-14)
We present a class of nonlinear truncated mixed-effects models where the truncation nature of the data is incorporated into the statistical model by assuming that the variable of interest, namely the truncated variable, ...
An increasing-angle property of the conjugate gradient method and the implementation of large-scale minimization algorithms with line searches
(John Wiley & Sons LtdW SussexInglaterra, 2003)
An ubiquitous three-term recurrence relation
(American Institute of Physics, 2021-03)
We solve an eigenvalue equation that appears in several papers about a wide range of physical problems. The Frobenius method leads to a three-term recurrence relation for the coefficients of the power series that, under ...
On some conditionally solvable quantum-mechanical problems
(IOP Publishing, 2020-09-03)
We analyze two conditionally solvable quantum-mechanical models: a one-dimensional sextic oscillator and a perturbed Coulomb problem. Both lead to a three-term recurrence relation for the expansion coefficients. We show ...
Power law distribution in education: Effect of economical, teaching, and study conditions in university entrance examination
(World Scientific Publ Co Pte Ltd, 2003-05-01)
We studied the statistical distribution of student's performance, which is measured through their marks, in university entrance examination (Vestibular) of UNESP (Universidade Estadual Paulista) with respect to (i) period ...
Power law distribution in education: Effect of economical, teaching, and study conditions in university entrance examination
(World Scientific Publ Co Pte Ltd, 2003-05-01)
We studied the statistical distribution of student's performance, which is measured through their marks, in university entrance examination (Vestibular) of UNESP (Universidade Estadual Paulista) with respect to (i) period ...
Chaos and Intermittency in the DNLS Equation Describing the Parallel Alfvén Wave Propagation
(Hindawi Publishing Corporation, 2014-04)
When the Hall effect is included in the magnetohydrodynamics equations (Hall-MHD model) the wave propagation modes become coupled, but for propagation parallel to the ambient magnetic field the Alfvén mode decouples from ...