Results 41 to 50 of about 47,091 (227)
Fundación Mazda para el arte y la ciencia décima segunda entrega de becas
Civilizar, 2003 Matemáticos y físicos, desde los albores de estas disciplinas han formulado problemas y conjeturas que muy posteriormente y gracias a herramientas nuevas y deaarrollo insospechados han encontrado alguna respuesta.
Fernando Isaza Delgado
doaj
Methods in Ecology and Evolution, Volume 16, Issue 6, Page 1136-1148, June 2025.Abstract One of the main limitations of phylogenetic comparative analyses is that associations between traits can only be interpreted as correlations. Here, we present a novel Bayesian structural equation model (PhyBaSE) which allows us to disentangle direct from indirect relationships among variables to propose potential causal hypotheses while ...
Achaz von Hardenberg +1 more
wiley +1 more source
Dirichlet problems with skew-symmetric drift terms
Comptes Rendus. MathématiqueWe prove existence of finite energy solutions for a linear Dirichlet problem with a drift and a convection term of the form $A\,E(x)\nabla u + \mathrm{div}(u\,E(x))$, with $A > 0$ and $E$ in $(L^{r}(\Omega ))^{N}$.
Boccardo, Lucio +2 more
doaj +1 more source
Mathematical Methods in the Applied Sciences, Volume 48, Issue 8, Page 9207-9224, 30 May 2025.ABSTRACT We consider a Maxwell system on ℝ3$$ {\mathbb{R}}^3 $$ with highly oscillating periodic coefficients. It is known that the solutions converge in the weak‐ ∗$$ \ast $$ topology of L∞(0,T;L2(ℝ3))$$ {L}^{\infty}\left(0,T;\kern0.3em {L}^2\left({\mathbb{R}}^3\right)\right) $$ to the solution of a similar problem with constant coefficients given as ...
Juan Casado‐Díaz +2 more
wiley +1 more source
Catálogo editorial, 2021 En dos de los problemas estudiados en sesiones anteriores se ha necesitado solucionar sistemas de ecuaciones lineales. En el caso de los trazadores cúbicos, es necesario solucionar un sistema tridiagonal con el fin de conocer los ci y en el cual la dimensión del sistema depende del número de puntos a interpolar.
Diego Arévalo-Ovalle +2 more
openaire +1 more source
Chemostat models with Monod and Haldane consumption functions and random environmental fluctuations
Mathematical Methods in the Applied Sciences, Volume 48, Issue 7, Page 7412-7431, 15 May 2025.In this paper, we study the asymptotic dynamics of two chemostat models with random environmental fluctuations modeled by means of real noise, where different consumption functions for the consumer species (Monod and Haldane) are taking into account. For each model, our main goal is to investigate the existence of deterministic attracting sets.
Tomás Caraballo +2 more
wiley +1 more source
, 1965 Es claro que dada una función indefinidamente diferenciable f(x1, x2, ...xn) puede existir un operador diferencial P(D) y una funcion u que sea indefinidamente diferenciable en x1, ....xj (j and lt; n) y no lo sea en x j+1 ...
openaire +3 more sources
MathematicsThere was an error in the original publication [...]
Inmaculada Gayte Delgado +1 more
doaj +1 more source
Stochastic COVID‐19 epidemic model incorporating asymptomatic and isolated compartments
Mathematical Methods in the Applied Sciences, Volume 48, Issue 7, Page 8400-8422, 15 May 2025.This study delves into the intricate dynamics of the COVID‐19 epidemic by extending a deterministic compartmental model incorporating asymptomatic, quarantined and isolated compartments, with a stochastic model capturing the natural randomness of the processes.
Tomás Caraballo +5 more
wiley +1 more source
Sistemas de ecuaciones lineales
, 2018 Identificación de posibilidades de solución de un sistema de ecuaciones lineales 2x2.1Definición de sistema de ecuaciones lineales 2x2. Solución gráfica del sistema..storyAplicar, Comparar, Comprender, Comprobar, Observar, Practicar, Recordar ...
Liliana Marcela González Carrillo +1 more
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