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Resultats globals: 6 registres trobats en 0.03 segons.
Articles, 6 registres trobats
Articles 6 registres trobats  
1.
28 p, 509.2 KB Well-posedness for the continuity equation for vector fields with suitable modulus of continuity / Clop, Albert (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Jylhä, Heikki (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Orobitg i Huguet, Joan (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Mateu Bennassar, Joan (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We prove well-posedness of linear scalar conservation laws using only assumptions on the growth and the modulus of continuity of the velocity field, but not on its divergence. As an application, we obtain uniqueness of solutions in the atomic Hardy space, H-1, for the scalar conservation law induced by a class of vector fields whose divergence is an unbounded BMO function.
2019 - 10.1016/j.jfa.2018.10.001
Journal of Functional Analysis, Vol. 276, Issue 1 (January 2019) , p. 45-77  
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2.
18 p, 333.3 KB Solving polynomials with ordinary differential equations / Gasull, Armengol (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Giacomini, Hector (Université de Tours. Institut Denis Poisson)
In this work we consider a given root of a family of n-degree polynomials as a one-variable function that depends only on the independent term. Then we prove that this function satisfies several ordinary differential equations (ODE). [...]
2021 - 10.1016/j.exmath.2021.06.001
Expositiones Mathematicae, Vol. 39, Issue 4 (December 2021) , p. 624-643  
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3.
25 p, 744.8 KB Differential equations with a given set of solutions / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Ramírez, Rafael Orlando (Universitat Rovira i Virgili. Departament d'Enginyeria Informàtica i Matemàtiques) ; Sadovskaia, Natalia (Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada II)
The aim of this paper is to study the following inverse problem of ordinary differential equations: For a given set of analytic functions ω={z(t),…,z(t)}, with z(t)=x(t)+iy(t) and z¯(t)=x(t)−iy(t) for j=1,…,r, defined in the open interval I⊆R, we want to determine the differential equation F(t,z¯,z,z˙,z¯˙,…,z,z¯)=0,where [Formula presented] for j=1,…,n, in such a way that the given set of functions ω is a set of solutions of this differential equation.
2020 - 10.1016/j.amc.2019.124659
Applied Mathematics and Computation, Vol. 365 (January 2020) , art. 124659  
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4.
24 p, 563.0 KB Singular solutions for a class of traveling wave equations arising in hydrodynamics / Geyer, Anna (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Mañosa Fernández, Víctor 1971- (Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada III)
We give an exhaustive characterization of singular weak solutions for ordinary differential equations of the form 12^2 F'(u) =0, where F is an analytic function. Our motivation stems from the fact that in the context of hydrodynamics several prominent equations are reducible to an equation of this form upon passing to a moving frame. [...]
2016 - 10.1016/j.nonrwa.2016.01.009
Nonlinear Analysis: Real World Applications, Vol. 31 (2016) , p. 57-76  
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5.
14 p, 126.3 KB On the probability of reaching a barrier in an Erlang(2) risk process / Claramunt Bielsa, M. Mercè 1964- (Universitat de Barcelona) ; Mármol, Maite (Universitat de Barcelona) ; Lacayo, Ramon A. (Universitat Autònoma de Barcelona)
In this paper the process of aggregated claims in a non-life insurance portfolio as defined in the classical model of risk theory is modified. The Compound Poisson process is replaced with a more general renewal risk process with interoccurrence times of Erlangian type. [...]
2005
SORT : statistics and operations research transactions, Vol. 29, Núm. 2 (July-December 2005) , p. 235-248  
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6.
12 p, 745.0 KB Dificultades de los estudiantes en la interpretación de las soluciones de ecuaciones diferenciales ordinarias que modelan un problema / Guerrero Ortiz, Carolina (Cinvestav. Departamento de Matemática Educativa) ; Camacho Machín, Matías (Universidad de La Laguna. Departamento de Análisis Matemático) ; Mejía Velasco, Hugo Rogelio (Cinvestav. Departamento de Matemática Educativa)
En este trabajo se analizan algunas de las dificultades que surgen en el momento de interpretar las soluciones de una ecuación Diferencial Ordinaria (EDO) cuando se expresan en forma gráfica y algebraica. [...]
In this work we analyzed some of the difficulties that arise when the student interpret the solutions of Ordinary Differential Equation (ODE) when they are expressed in graphical and algebraic form. The investigation was carried out with Engineering students who were at the end of a first course of ODE, who realized some activities in a graphical dynamic environment that included the interpretation of the solutions represented in algebraic and graphic form of a ODE that models the behavior of a population. [...]
2010 - 10.5565/rev/ec/v28n3.431
Enseñanza de las ciencias, Vol. 28, Núm. 3 (2010) , p. 341-352  
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