Results 31 to 40 of about 2,178,860 (334)

Advances on Matroid Secretary Problems: Free Order Model and Laminar Case [PDF]

open access: yes, 2012
The most well-known conjecture in the context of matroid secretary problems claims the existence of a constant-factor approximation applicable to any matroid. Whereas this conjecture remains open, modified forms of it were shown to be true, when assuming
A. Gupta   +10 more
core   +6 more sources

Approximate Derivations of Order n [PDF]

open access: yesActa Mathematica Hungarica, 2014
The aim of this paper is to prove characterization theorems for higher order derivations. Among others we prove that the system defining higher order derivations is stable. Further characterization theorems in the spirit of N.~G.~de Bruijn will also be presented.
openaire   +2 more sources

Two approximation methods for fractional order Pseudo-Parabolic differential equations

open access: yesAlexandria Engineering Journal, 2022
In this study, fractional order pseudo-parabolic partial differential equation defined by Caputo derivative is investigated with initial-boundary conditions. Modified double Laplace decomposition method is used to find the exact solution of this equation.
Mahmut. Modanli   +4 more
doaj   +1 more source

Exact Conservation Laws of the Gradient Expanded Kadanoff-Baym Equations [PDF]

open access: yes, 2001
It is shown that the Kadanoff-Baym equations at consistent first-order gradient approximation reveal exact rather than approximate conservation laws related to global symmetries of the system.
Abraham-Ibrahim   +70 more
core   +3 more sources

Convergence of the matrix method of numerical integration of the boundary value problems for linear nonhomogeneous ordinary differential second order equations with variable coefficients

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2015
The problems of stability and convergence of previously proposed matrix method of numerical integration of boundary value problems with boundary conditions of the first, second and third kinds of nonhomogeneous linear ordinary differential second order ...
Vladimir N Maklakov
doaj   +1 more source

The Chebyshev Set Problem in Riesz Space

open access: yesJournal of Function Spaces, 2022
In this paper, we mainly study the best approximation theory in Riesz space, which is not constructed by the norm, but only rely on the order structure.
Shengwei Wu   +4 more
doaj   +1 more source

The precision of slow-roll predictions for the CMBR anisotropies [PDF]

open access: yes, 2000
Inflationary predictions for the anisotropy of the cosmic microwave background radiation (CMBR) are often based on the slow-roll approximation. We study the precision with which the multipole moments of the temperature two-point correlation function can ...
Martin, Jerome, Schwarz, Dominik
core   +2 more sources

Direct Estimate for Some Operators of Durrmeyer Type in Exponential Weighted Space

open access: yesDemonstratio Mathematica, 2014
In the present paper, we investigate the convergence and the approximation order of some Durrmeyer type operators in exponential weighted space. Furthermore, we obtain the Voronovskaya type theorem for these operators.
Krech Grażyna, Wachnicki Eugeniusz
doaj   +1 more source

On Cavity Approximations for Graphical Models [PDF]

open access: yes, 2007
We reformulate the Cavity Approximation (CA), a class of algorithms recently introduced for improving the Bethe approximation estimates of marginals in graphical models.
B. Wemmenhove   +8 more
core   +4 more sources

Approximate Partial Order Reduction [PDF]

open access: yes, 2018
23 pages, 5 figures. Accepted at 22nd International Symposium on Formal Methods (FM 2018)
Fan, Chuchu, Huang, Zhenqi, Mitra, Sayan
openaire   +2 more sources

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