Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Fernando Dobarro"'
For appropriate orthonormal wavelet basis {ψ^e_jk} j∈Zk∈Z^de∈{0,1}^d, constants p and γ , if I_γ denotes the Riesz fractional integral operator of order γ and (ηjke)j∈Zk∈Z^de∈{0,1}^d a sequence of independent identically distributed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8594972e10e2c23ad15dff4af1fe3ca4
https://ieeexplore.ieee.org/document/9069293/
https://ieeexplore.ieee.org/document/9069293/
Autor:
Fernando Dobarro1, Bülent Ünal2
Publikováno v:
Acta Applicandae Mathematicae. Oct2008, Vol. 104 Issue 1, p1-46. 46p. 8 Charts, 1 Graph.
Autor:
Bülent Ünal, Fernando Dobarro
Publikováno v:
Journal of Geometry and Physics
Cataloged from PDF version of article. We provide a global characterization of the Killing vector fields of a standard static space-time by a system of partial differential equations. By studying this system, we determine all the Killing vector field
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f09f8feb9e94d2995251d37dea0867b
https://doi.org/10.1016/j.geomphys.2011.12.010
https://doi.org/10.1016/j.geomphys.2011.12.010
Autor:
Bülent Ünal, Fernando Dobarro
Publikováno v:
Nonlinear Analysis: Theory, Methods and Applications
Nonlinear Analysis, Theory, Methods and Applications
Nonlinear Analysis, Theory, Methods and Applications
In the framework of standard static space times, we state a family of sufficient or necessary conditions for a set of physically reasonable energy and convergence conditions in relativity and related theories. We concentrate our study on questions ab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2dbcffc48e5dd35763fdfd99049174c0
https://doi.org/10.1016/j.na.2009.04.035
https://doi.org/10.1016/j.na.2009.04.035
Autor:
Bülent Ünal, Fernando Dobarro
Publikováno v:
Journal of Physics A : Mathematical and Theoretical
We consider the curvature of a family of warped products of two pseduo-Riemannian manifolds $(B,g_B)$ and $(F,g_F)$ furnished with metrics of the form $c^{2}g_B \oplus w^2 g_F$ and, in particular, of the type $w^{2 \mu}g_B \oplus w^2 g_F$, where $c,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b604f495998b4ba2e6ebd3c7ec0c5c16
https://doi.org/10.1088/1751-8113/40/46/006
https://doi.org/10.1088/1751-8113/40/46/006
Autor:
Fernando Dobarro, Bülent Ünal
Publikováno v:
Nonlinear Analysis. 59:759-770
Essentially, some conditions for the Riemannian factor and the warping function of a standard static space–time are obtained in order to guarantee that no nontrivial warping function on the Riemannian factor can make the standard static space–tim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e945ca970a265a9ccb9d3b696949de3
https://doi.org/10.1016/s0362-546x(04)00286-x
https://doi.org/10.1016/s0362-546x(04)00286-x
The problem of the nonequivalence of the sets of equilibrium points and energy-Casimir extremal points, which occurs in the noncanonical Hamiltonian formulation of equations describing ideal fluid and plasma dynamics, is addressed in the context of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f49418a3dffe3fefb6588e47c46c3dd6
Autor:
Bülent Ünal, Fernando Dobarro
In this paper, we study Ricci-flat and Einstein Lorentzian multiply warped products. We also consider the case of having constant scalar curvatures for this class of warped products. Finally, after we introduce a new class of spacetimes called as gen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::642f5783c9aee1de2cfc3b62ac92a65f
Autor:
Fernando Dobarro, Bülent Ünal
Publikováno v:
Acta Applicandae Mathematicae
We introduce the concept of a base conformal warped product of two pseudo-Riemannian manifolds. We also define a subclass of this structure called as a special base conformal warped product. After, we explicitly mention many of the relevant fields wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::044768083340f44ecbe4f6172626fc89