Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Pablo Amster"'
Autor:
Pablo Amster, José Ángel Cid
Publikováno v:
Revista de Educación Matemática, Vol 38, Iss 2, Pp 16-27 (2023)
Presentamos una versión divulgativa de nuestro artículo (Amster y Cid, 2022) en el que mostramos cómo la raíz cuadrada compleja nos permite demostrar de una forma muy sencilla diversos resultados topológicos en el plano, tan profundos como el Te
Externí odkaz:
https://doaj.org/article/5a32297dffd245119538183f2437be2b
Autor:
Pablo Amster, Colin Rogers
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2023, Iss 23, Pp 1-14 (2023)
Here, a proto-type Ermakov–Painlevé I equation is introduced and a homogeneous Dirichlet-type boundary value problem analysed. In addition, a novel Ermakov–Painlevé I system is set down which is reducible by an involutory transformation to the
Externí odkaz:
https://doaj.org/article/1a89a161bd4643d1854e78f7a009e202
Autor:
Pablo Amster
Publikováno v:
Electronic Journal of Differential Equations, Vol Special Issues, Iss 01, Pp 1-11 (2021)
Externí odkaz:
https://doaj.org/article/40d63c59019943db9d51a81cf779af23
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2020, Iss 62, Pp 1-11 (2020)
We study some properties of the range of the relativistic pendulum operator $\mathcal P$, that is, the set of possible continuous $T$-periodic forcing terms $p$ for which the equation $\mathcal P x=p$ admits a $T$-periodic solution over a $T$-periodi
Externí odkaz:
https://doaj.org/article/a6beb260ac914448bfae7316b0222c37
Publikováno v:
Opuscula Mathematica, Vol 40, Iss 4, Pp 405-425 (2020)
We establish the existence and multiplicity of solutions for some boundary value problems on time scales with a \(\varphi\)-Laplacian operator. For this purpose, we employ the concept of lower and upper solutions and the Leray-Schauder degree. The re
Externí odkaz:
https://doaj.org/article/9bbd07c094874e66b5ad8fa11211ff00
Autor:
Pablo Amster
Publikováno v:
Revista de Educación Matemática, Vol 35, Iss 2, Pp 5-20 (2020)
En este artículo se presentan las ideas principales de la versión discreta del modelo SIR (Susceptibles, Infectados, Recuperados), que se emplea para describir las epidemias y se ha convertido en protagonista impensado en los tiempos actuales. Se m
Externí odkaz:
https://doaj.org/article/c72ba0ebaec548339f0ebf6611b09720
Autor:
Pablo Amster, Colin Rogers
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2019, Iss 69, Pp 1-10 (2019)
A Neumann-type boundary value problem is investigated for a hybrid Ermakov–Painlevé equation. Existence properties are established and a sequence of approximate solutions is investigated. In an appendix, a novel class of coupled Hamiltonian Ermako
Externí odkaz:
https://doaj.org/article/a7c41f9e3bd74aa1928a456e821078a1
Autor:
Pablo Amster, Mariel Kuna
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2017, Iss 37, Pp 1-11 (2017)
A second order ordinary differential equation with a superlinear term is studied under radiation boundary conditions. Employing the variational method and an accurate shooting-type argument, we prove the existence of at least three or five solutions,
Externí odkaz:
https://doaj.org/article/378066ac05c4435f92860929555c9235
Autor:
Pablo Amster
Publikováno v:
Desde el Jardín de Freud, Iss 17 (2017)
En el curso del seminario 19, “... Ou pire”, el psicoanalista francés Jacques Lacan pronunció una de esas frases que iban a traer más de un dolor de cabeza a sus seguidores: No hay enseñanza más que matemática, el resto es broma. Pero esta
Externí odkaz:
https://doaj.org/article/60f3be42d50c4a479af769ace867c2ae
Publikováno v:
Electronic Journal of Differential Equations, Vol 2013, Iss 272,, Pp 1-14 (2013)
The Wheldon model (1975) of a chronic myelogenous leukemia (CML) dynamics is modified and enriched by introduction of a time-varying microenvironment and time-dependent drug efficacies. The resulting model is a special class of nonautonomous nonli
Externí odkaz:
https://doaj.org/article/bb541d69c653496f91d7e707c1658a04