Zobrazeno 1 - 10
of 42
pro vyhledávání: '"F. M. Fernández"'
Publikováno v:
Revista Argentina de Microbiología, Vol 38, Iss 4, Pp 216-218 (2006)
La asociación entre infección por herpesvirus equino 2 (HVE-2) y enfermedad respiratoria en los equinos plantea un interrogante acerca del verdadero papel del virus como agente causal de la enfermedad, debido a que este virus también ha sido detec
Externí odkaz:
https://doaj.org/article/cd1fb5af0f9a4cc0a0fc1cdda2e8051c
Autor:
P. Amore, F. M. Fernández
Publikováno v:
Acta Polytechnica, Vol 51, Iss 4 (2011)
We propose a method for the treatment of two-point boundary value problems given by nonlinear ordinary differential equations. The approach leads to sequences of roots of Hankel determinants that converge rapidly towards the unknown parameter of the
Externí odkaz:
https://doaj.org/article/839373ab67d44f6eaf27dc3401a8bc6c
Autor:
P. Amore, F. M. Fernández
Publikováno v:
Acta Polytechnica, Vol 50, Iss 5 (2010)
We study a harmonic molecule confined to a one-dimensional box with impenetrable walls. We explicitly consider the symmetry of the problem for the cases of different and equal masses. We propose suitable variational functions and compare the approxim
Externí odkaz:
https://doaj.org/article/be909ef406284bcbbb725783b6d6ab92
Autor:
F M Fernández
Publikováno v:
European Journal of Physics. 26:151-155
We derive the main equations for the Magnus expansion, Wilcox formula and Fer's product in a simple, straightforward way that we believe is most suitable for teaching purposes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcd9b84f0a56126a5309af4e965355fd
https://doi.org/10.1088/0143-0807/26/1/015
https://doi.org/10.1088/0143-0807/26/1/015
Autor:
C.G. Diaz, F. M. Fernández
Publikováno v:
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Universidad Nacional de La Plata
instacron:UNLP
We show that algebraic approximants prove suitable for the summation of the perturbation series for the eigenvalues of periodic problems. Appropriate algebraic approximants constructed from the perturbation series for a given eigenvalue provide infor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a095e8072c1658c6fbf700439ada28f8
https://doi.org/10.1007/s100530170181
https://doi.org/10.1007/s100530170181
Autor:
F. M. Fernández, R. H. Tipping
Publikováno v:
Canadian Journal of Physics. 78:845-850
We propose a systematic construction of algebraic approximants for the bound-state energies of anharmonic oscillators. The approximants are based on the Rayleigh-Schrödinger perturbation series and take into account the analytical behavior of the en
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f486b6df17d7b0a146640d5193fd2bd9
https://doi.org/10.1139/p00-066
https://doi.org/10.1139/p00-066
Autor:
F M Fernández
Publikováno v:
European Journal of Physics. 18:440-443
By means of a straightforward Lie algebraic method we find a class of quantum mechanical models that admit non-spreading wavepackets. Resumen. Mediante un sencillo metodo algebraico obtenemos una clase de modelos mecano cuanticos que admiten paquetes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4877e426f66125d841216852fc73cf88
https://doi.org/10.1088/0143-0807/18/6/006
https://doi.org/10.1088/0143-0807/18/6/006
Autor:
F M Fernández
Publikováno v:
European Journal of Physics. 18:436-439
We show that a simple formula for the solution of second-order ordinary inhomogeneous differential equations with constant coefficients is suitable for the straightforward application of perturbation theory to small oscillations. We consider the moti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e29bfae205642083e229ce861f2b24b4
https://doi.org/10.1088/0143-0807/18/6/005
https://doi.org/10.1088/0143-0807/18/6/005
Autor:
F M Fernández, R Guardiola
Publikováno v:
Journal of Physics A: Mathematical and General. 30:5825-5833
We present a method for calculating the energies of bound and quasibound states of quantum-mechanical problems expressed in terms of coupled-channel equations. The approach is based on a rational approximation to the logarithmic derivative of the eig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e21c4ac9877bfe6b766fbd22c7935067
https://doi.org/10.1088/0305-4470/30/16/023
https://doi.org/10.1088/0305-4470/30/16/023
Autor:
R Guardiola, F M Fernández
Publikováno v:
Journal of Physics A: Mathematical and General. 30:3101-3105
By using properties of the Sturm sequences related to tridiagonal matrices we describe a very efficient algorithm to determine the density of resonance states based on the stabilization method.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e21e84d0c3887210818ab3dc68656d31
https://doi.org/10.1088/0305-4470/30/9/020
https://doi.org/10.1088/0305-4470/30/9/020