Results 61 to 70 of about 827,039 (225)

UN PROBLEMA TRIDIMENSIONALE DI TRASPORTO FUORI DI UNA SFERA RIFLETTENTE

Ratio Mathematica, 1991
In this paper we study the linear monoenergetic Boltzmann equation in the space external to a sphere ofradius n> f} with specular refiectionboundary conditions- By means oftheory of linear positive operator semigroups in Banach spaces we Show that ...
L Bassi, P Gamba
doaj  

Equi-statistical convergence of positive linear operators

Journal of Mathematical Analysis and Applications, 2008
The authors study a Korovkin-type approximation theorem using the equi-statistical convergence which is stronger than the statistical uniform convergence. By an example it is shown that the new approximation result works while its classical and statistical cases do not work.
Karakus, Sevda, Demirci, Kamil, Duman, Oktay   +2 more
openaire   +2 more sources

Domination and Kwapień’s factorization theorems for positive Cohen p–nuclear m–linear operators [PDF]

, 2020
Amar Bougoutaia, Amar Belacel, Halima Hamdi   +2 more
openalex   +1 more source

A discrete Stochastic Korovkin theorem

International Journal of Mathematics and Mathematical Sciences, 1991
In this article we give a sufficient condition for the pointwise −− in the first mean Korovkin property on B0(P), the space of stochastic processes with real state space and countable index set Γ and bounded first moments.
George A. Anastassiou
doaj   +1 more source

Notes On The Non Linear Operator Equation I AXAX n  *

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2016
  Necessary and sufficient conditions for the operator equation I AXAX n  * , to have a real positive definite solution X are given. Based on these conditions, some properties of the operator A as well as relation between the solutions X ...
B.A. Ahmed, M.M. Hilal
doaj  

Some refinements of operator reverse AM-GM mean inequalities

Journal of Inequalities and Applications, 2017
In this paper, we prove the operator inequalities as follows: Let A , B $A,B$ be positive operators on a Hilbert space with 0 < m ≤ A , B ≤ M $0 < m \le A,B \le M$ and M m ≤ 2.314 $\sqrt{\frac{M}{m}} \le2.314$ .
Jianming Xue
doaj   +1 more source

The Carathéodory Pseudodistance and Positive Linear Operators

International Journal of Mathematics, 1997
We give a new elementary proof of Lempert's theorem, which states that for convex domains the Carathéodory pseudodistance coincides with the Lempert function and thus with the Kobayashi pseudodistance. Moreover, we prove the product property of the Carathéodory pseudodistance.
openaire   +2 more sources

Positive linear operators continuous for strict topologies [PDF]

Proceedings of the American Mathematical Society, 1974
If A A is an S W SW algebra of real-valued functions on a set X X equipped with the weak topology for A A , and if A A separates its zero sets, then many results valued for C b (
openaire   +1 more source

On the modified beta approximating operators of second kind

Journal of Numerical Analysis and Approximation Theory, 2005
We shall define a general linear operator from which we obtain as particular case the modified beta second kind operator\[(T_{p,q}f)(x)=\frac{1}{B(p,q)}\int_0^\infty\tfrac{u^{p-1}}{(1+u)^{p+q}}f\left(\frac{B(p,q)}{B(p+a,q-a)}u^ax\right){\rm d}u.\] We ...
Vasile Miheşan
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Operator upper bounds for Davis-Choi-Jensen's difference in Hilbert spaces [PDF]

Mathematica Moravica
In this paper we obtain several operator inequalities providing upper bounds for the Davis-Choi-Jensen's Difference Ph (f (A)) - f (Ph (A)) for any convex function f : I → R, any selfadjoint operator A in H with the spectrum Sp (A) ⊂ I and any linear ...
Dragomir Silvestru Sever
doaj   +1 more source