Results 51 to 60 of about 811 (117)

Mechanical Hamiltonization of Unreduced ϕ$\phi$‐Simple Chaplygin Systems

Studies in Applied Mathematics, Volume 154, Issue 5, May 2025.
ABSTRACT In this paper, we prove that the trajectories of unreduced ϕ$\phi$‐simple Chaplygin kinetic systems are reparameterizations of horizontal geodesics with respect to a modified Riemannian metric. Furthermore, our proof is constructive and these Riemannian metrics, which are not unique, are obtained explicitly in interesting examples.
Alexandre Anahory Simoes, Juan Carlos Marrero, David Martín de Diego   +2 more
wiley   +1 more source

The minima of the geodesic length functions of uniform filling curves

Journal of the London Mathematical Society, Volume 111, Issue 4, April 2025.
Abstract There is a natural link between (multi‐)curves that fill up a closed oriented surface and dessins d'enfants. We use this approach to exhibit explicitly the minima of the geodesic length function of filling curves that admit a self‐transverse homotopy equivalent representative such that all self‐intersection points, as well as all faces of the ...
Ernesto Girondo, Gabino González‐Diez, Rubén A. Hidalgo   +2 more
wiley   +1 more source

Symmetric Double Normal Models for Censored, Bounded, and Survival Data: Theory, Estimation, and Applications

Mathematics
We develop a unified likelihood-based framework for limited outcomes built on the two-piece normal family. The framework includes a censored specification that accommodates boundary inflation, a doubly truncated specification on (0,1) for rates and ...
Guillermo Martínez-Flórez, Hugo Salinas, Javier Ramírez-Montoya   +2 more
doaj   +1 more source

A Note of Non‐Existence of Strongly Regular and Deza Graphs

Electronics Letters, Volume 61, Issue 1, January/December 2025.
ABSTRACT In this letter, we prove that strongly regular graphs and Deza digraphs do not exist with parameters (pm,k,2m,2m)$(p^m,k,2^m,2^m)$ where m=3,4$m=3,4$. As a consequence, we provide many parameters for which there is no a difference set.
Fernando Andres Benavides, Carlos Alberto Trujillo Solarte   +1 more
wiley   +1 more source

High‐order in‐cell discontinuous reconstruction path‐conservative methods for nonconservative hyperbolic systems–DR.MOOD method

Numerical Methods for Partial Differential Equations, Volume 40, Issue 6, November 2024.
Abstract In this work, we develop a new framework to deal numerically with discontinuous solutions in nonconservative hyperbolic systems. First an extension of the MOOD methodology to nonconservative systems based on Taylor expansions is presented.
Ernesto Pimentel‐García, Manuel J. Castro, Christophe Chalons, Carlos Parés   +3 more
wiley   +1 more source

On the Cramér–Von Mises Statistic

Revista de Matemática: Teoría y Aplicaciones, 2012
Probably, one of the most useful criterions in order to compare distribution functions is the one introduced by the researchers Harald Cramér and Richard Edler von Mises which is known as Cramérvon Mises criterion $(C_M)$.
Pablo Martínez-Camblor, Carlos Carleos, Norberto Corral   +2 more
doaj   +1 more source

Distance to Spaces of Semicontinuous and Continuous Functions

Journal of Function Spaces, 2019
Given a topological space X, we establish formulas to compute the distance from a function f∈RX to the spaces of upper semicontinuous functions and lower semicontinuous functions.
Carlos Angosto
doaj   +1 more source

Variables psicológicas relacionadas con el rendimiento académico en matemática y estadística en alumnos del primer y segundo año de la facultad de psicología de la UNMSM

Revista de Investigación en Psicología, 2001
El objetivo de esta investigación es estudiar las relaciones entre la inteligencia general, el auto concepto académico, los rasgos animación, respeto por las normas y sensibilidad, la actitud hacia la matemática y la estadística, la motivación y las ...
Jaime Aliaga Tovar, Carlos Ponce Díaz, Víctor Gutiérrez Olaya, Gloria Díaz Acosta, Yesica Reyes Tejada, Alejandro Pinto López   +5 more
doaj   +1 more source

Effectiveness of Centrality Measures for Competitive Influence Diffusion in Social Networks

Mathematics
This paper investigates the effectiveness of centrality measures for the influence maximization problem in competitive social networks (SNs). We consider a framework, which we call “I-Game” (Influence Game), to conceptualize the adoption of competing ...
Fairouz Medjahed, Elisenda Molina, Juan Tejada   +2 more
doaj   +1 more source

Concepciones sobre la estadística, su enseñanza y aprendizaje: Un estudio exploratorio con estudiantes para profesor en matemática [PDF]

Ikastorratza.e-Revista de Didáctica, 2017
Este trabajo se ubica en la problemática de la formación de profesores en matemática en el área de estadística. Presentamos resultados de la implementación y análisis de un cuestionario diseñado para caracterizar las concepciones sobre estadística, su ...
Claudia Noemí Ferrari, Ana Rosa Corica
doaj