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Content available remote Approximation properties of certain summation integral type operators
In the present paper, we study approximation properties of a family of linear positive operators and establish direct results, asymptotic formula, rate of convergence, weighted approximation theorem, inverse theorem and better approximation for this family of linear positive operators.
The spectral properties and the asymptotic behaviour of the discrete spectrum for a special class of infinite tridiagonal matrices are given. We derive the asymptotic formulae for eigenvalues of unbounded complex Jacobi matrices acting in l2(N).
This paper considers the asymptotic properties for the spectrum of a positive integer power l of the Laplace–Beltrami operator acting on an n-dimensional torus T. If N(λ) is the number of eigenvalues counted with multiplicity, smaller than a real positive number λ, we establish a Weyl-type asymptotic formula for the spectral problem of the polyharmonic operators on T, that is, as (…), where (…) is the volume of the unit ball in Rn and Vol T is the area of T, which gives the information of the area of the torus based on the spectrum of the polyharmonic operators.
Content available remote Unified elliptic-type integrals and asymptotic formulas
The object of the present paper is to consider a unified and extended form of certain families of elliptic-type integrals, which have been discussed in number of earlier works on the subject due to their importance and applications in problems arising in radiation physics and nuclear technology. The results obtained are of general character and include the investigations carried out by several authors. We obtain asymptotic formulas for the unified elliptic-type integrals.
The aim of this paper is to present estimates for the rate of pointwise convergence of the kantorovichians of the discrete Feller operators in some classes of absolutely continuous functions, in particular, for functions with derivatives of bounded variation in the generalized sense.
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