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k-th rekord values from Dagum distribution and characterization

Devendra Kumar — 2016

Discussiones Mathematicae Probability and Statistics

In this study, we gave some new explicit expressions and recurrence relations satisfied by single and product moments of k-th lower record values from Dagum distribution. Next we show that the result for the record values from the Dagum distribution can be derived from our result as special case. Further, using a recurrence relation for single moments and conditional expectation of record values we obtain characterization of Dagum distribution. In addition, we use the established explicit expression...

On approximation and interpolation of entire functions with index-pair (p,q).

H. S. KasanaDevendra Kumar — 1994

Publicacions Matemàtiques

In this paper we have studied the Chebyshev and interpolation errors for functions in C(E), the normed algebra of analytic functions on a compact set E of positive transfinite diameter. The (p,q)-order and generalized (p,q)-type have been characterized in terms of these approximation errors. Finally, we have obtained a saturation theorem for f ∈ C(E) which can be extended to an entire function of (p,q)-order 0 or 1 and for entire functions of minimal generalized (p,q)-type.

An efficient computational approach for generalized Hirota-Satsuma coupled KdV equations arising in shallow water waves

Sumit GuptaDevendra KumarJagdev Singh — 2017

Waves, Wavelets and Fractals

The aim of this letter is to present a numerical algorithm for generalized Hirota-Satsuma coupled KdV equations arising in unidirectional propagation of shallow water waves by using the homotopy analysis transform technique. The computational approach is the merged form of the homotopy analysis technique and Laplace transform scheme. The technique provides a series solution, which converges very fast, components are very easily calculated, and it does not require linearization or small perturbation....

On the approximation of entire functions over Carathéodory domains

Devendra KumarHarvir S. Kasana — 1994

Commentationes Mathematicae Universitatis Carolinae

Let D be a Carathéodory domain. For 1 p , let L p ( D ) be the class of all functions f holomorphic in D such that f D , p = [ 1 A D | f ( z ) | p d x d y ] 1 / p < , where A is the area of D . For f L p ( D ) , set E n p ( f ) = inf t π n f - t D , p ; π n consists of all polynomials of degree at most n . In this paper we study the growth of an entire function in terms of approximation error in L p -norm on D .

An efficient computational approach for linear and nonlinear fractional differential equations

Jagdev SinghDevendra KumarRam SwroopRam Prakash Sharma — 2017

Waves, Wavelets and Fractals

The pivotal aim of this article is to propose an efficient computational technique namely q-homotopy analysis transform method (q-HATM) to solve the linear and nonlinear time-fractional partial differential equation. In q-HATM iterative process, we investigate the behavior of independent variable for convergent series solution in admissible range. The q-HATM technique manipulates and controls the series solution, which rapidly converges to the exact solution in large admissible domain in a very...

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