Modern Scientific Press

ABSTRACT: The object of this paper is to establish a general Eulerian integral involving the multivariable Aleph-function and multivariable I-function which provides unification and extension of numerous results. Several particular cases will be studied.

ABSTRACT: In this article, we have considered the first and second law of thermodynamics to investigate the flow and thermal decomposition in a variable viscosity couette flow of conducting fluid in a rotating system under the combined effect of magnetic field and Hall current. The non-linear differential equations are solved analytically. The analytical expressions of dimensionless fluid velocity and temperature profiles are derived by using the Homotopy analysis method. We also derived the analytical expressions of the entropy generation rate, Bejan number, Skin friction coefficients and Nusselt number. The graphical representations of temperature, velocity, entropy generation rate, Bejan number, Nusselt number and Skin friction coefficients are also presented by various values of thermophysical parameters. The entropy production is more at the lower fixed plate region while the effect of heat transfer irreversibility at the upper moving plate region increased by fluid rotation.

ABSTRACT: In this paper we investigate the third Hankel H₃(1) determinant for normalized univalent functions belonging to the class R(α; A,B)  in the unit disc E={z:|z|<1}. The class includes very important subclass of the family of univalent functions- the class of functions whose derivative has a positive real part denoted by R. Our results therefore includes the special cases of the third Hankel determinants for the two classes of functions.

ABSTRACT: In this paper, the solutions of Cauchy problems for the stochastic advection and stochastic diffusion equations are obtained using the finite difference method. In the case when the flow velocity is a function of stochastic flow velocity and also, the diffusion coefficient in the stochastic heat equation is a function of stochastic diffusion coefficient, the consistency and stability of the finite difference scheme we are used need to be performed under mean square calculus.

ABSTRACT: In sample surveys, it is usual to make use of auxiliary information to increase the precision in estimating the population parameters to be estimated. In the present paper we propose a new class of improved ratio type estimators in simple random sampling without replacement for estimating finite population mean using the linear combinations of population deciles, median and correlation coefficient, coefficient of variation of the auxiliary variable, obtain their mean square error (MSE), bias and compare with the existing estimators. By this comparison we conclude that our proposed estimators are more efficient than the existing estimators. Numerical study is provided to support the theoretical results.

ABSTRACT: The present study concerned with trinomial delay differential equation of third-order with the hypothesis that the differential equation of second-order is nonoscillatory. By means of a generalized Riccati transformation technique, we established new oscillation results for this equation. An example is provided to illustrate the fundamental results.

ABSTRACT: We have considered the β−change of Finsler metric L →L given by L = f(L, β), where f is any positively homogeneous function of degree one in L and one-form β. The purpose of the present paper is to find the condition under which a β−change of Douglas space becomes a Douglas space. We have also found the necessary and sufficient condition under which a β−change becomes a projective change.

ABSTRACT: As we know, let alone to find the determinant of infinite matrix, it is difficult to find the determinant of some n x n matrixes by the usual methods like, the cofactor method and Crammer’s rule. But now we will show how to find the determinant of some n x n matrices and how to find the determinant of some infinite matrix by using Exponential Generating Functions. In this paper we will consider matrices having 1, 2, 3, 4, 5,…on the supper diagonal, 0"s on the upper and identical entries on each diagonal below the supper diagonal. Here we will try how to obtain the determinant of n x n upper left corner sub matrix of a given infinite matrix by introducing Exponential Generating functions of some sequences and how to get a sequence by calculating the determinant of n x n upper left corner sub matrix of infinite matrix. We will also check the correctness of the determinant by using Numerical method.

ABSTRACT: This paper develops optimal ordering and transfer policy for an inventory with non-increasing dependent demand from the warehouse to the display area. Mathematical model is developed for finding optimal order quantity, cycle time and total profit. The main aim is to find maximum the average profit per unit time provided by the retailer. Moreover, a numerical example is provided to illustrate the proposed model. Next, sensitivity analysis with respect to different parameters is established to demonstrate the model developed. Mathematica 5.1 software is used to find numerical result.

ABSTRACT: Most of the literature on survey sampling deals with obtaining optimum strata boundaries is based on only one stratifying variable. In this paper the problem of obtaining optimum strata boundaries when we have two concomitant variables with one estimation variable and the regression line between them is assumed to be linear. Neyman allocation procedure has been made for obtaining optimum strata boundaries from minimal equations. Due to complexities of minimal equations,we are supposed to have approximate to the variance of the study variable. This approximation depends only on the number of strata, the simultaneous density of stratifying variables and the correlation between the study variable and each of the stratifying variables. Numerical illustration has been done when the stratifying variables follow some particular distributions.

ABSTRACT: In this paper, Hermite wavelet for the numerical solution of Fredholm integral equations of the second kind is proposed. The method is based upon Hermite wavelet approximations. The Hermite wavelet is first presented and the resulting Hermite wavelet matrices are utilized to reduce the integral equations into system of algebraic equations. The required Hermite coefficients are computed using Matlab. The technique is tested on some numerical examples and comparisons are made with the exact and existing method. Error analysis is worked out, which shows efficiency of the method.