F: Mathematics & Decision (359)
GJSFR: F
Study On Prey-Predator Model With Predator In Disease And Harvesting
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 2 In this article, predator prey interactions where the predator is exposed to the risk of disease and harvesting is proposed. Equilibrium points, boundedness, and non-periodic solutions of the model are obtained. Local stability and global stability were discussed. The equilibrium was stable locally, but not globally. ...
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Authors Ahmed Buseri AshineRead Journal Click Here
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Page No. 23 to 27
Properties of Simple Semirings
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 2 Authors determine different properties of simple semiring which was introduced by Golan [3]. We also proved some results based on the papers of Fitore Abdullahu [1]. P. Sreenivasulu Reddy and Guesh Yfter tela [4]. ...
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Authors P. Sreenivasulu Reddy, Abduselam Mahamed DerdarRead Journal Click Here
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Page No. 1 to 4
Smoothness for Some Selected Test Functions Relative to Shape Parameter via IMQ
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 2 Radial basis function (RBF) approximation has the potential to provide accurate func-tion approximations for large data site given at scattered node locations which yields smooth solutions for a given number of node points especially when the basis functions are scaled to be nearly at and when the shape parameter is choose wisely. In this paper, we concentrate on the choice of shape para...
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Authors K. Issa, B. O. SanniRead Journal Click Here
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Page No. 29 to 36
Fish Harvesting Experienced by Depensation Growth Function
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 2 Getachew [1] introduced there is overfishing in Lake Tana, Amhara, Ethiopia using critical depensation model. In this paper, we applied this technique for depensation model. We investigated that if we consider depensation model we found that there is overfishing. ...
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Authors Getachew Abiye SalilewRead Journal Click Here
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Page No. 37 to 47
Positive Definite and Related Functions in the Product of Hypercomplex Systems
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 2 The main aim of this paper is to explore harmonic properties of functions defined in the product of hypercomplex systems. By means of the generalized translation operators, the precise definition of the product of commutative hypercomplex systems is given and full description for its properties are shown. The integral representations of positive definite function defined in the product o...
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Authors A.S. Okb El Bab, A.M. Zabel, Hossam A. Ghany, M. ZakaryaRead Journal Click Here
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Page No. 49 to 61
Lagrangian Dynamical Systems on Clifford Ka ̈hler Manifolds
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 2 In his paper we obtained a canonical local basis {ð½ð½ð‘–} ,ð‘–ð‘–=1,5 of vector bundle 𑉠on Clifford ð¾ð‘ŽÌˆâ„Žð‘™er manifold (ð‘€,ð‘‰). The paths of semispray on Clifford Ã...
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Authors Gebreel Mohammed Khur Baba Gebreel, Mohammed Ali BashirRead Journal Click Here
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Page No. 5 to 22
Loss of Fitting and Distance Prediction in Fixed vs Updated ARIMA Models
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 1 In many cases, it might be advisable to keep an operational time series model fixed for a given span of time, instead of updating it as a new datum becomes available. One common case, is represented by model–based deseasonalization procedures, whose time series models are updated on a regular basis by National Statistical Offices. In fact, in order to minimize the extent...
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Authors Livio FengaRead Journal Click Here
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Page No. 19 to 29
General Coordinate Formula of Strain (Skew Reflection) of R2 Onto R2
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 1 The authors establish a set of presumably new results, which provide general coordinate formula of strain(skew reflection) of â„Â2 onto â„Â2. Several closely related results are also considered. ...
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Authors Gedefa Negassa Feyissa, M.P. ChaudharyRead Journal Click Here
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Page No. 53 to 58
Role of Banks and Financial Institutions in Export Finance of Bangladesh
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 1 With a view to find out the role of banks and financial institutions in export finance of Bangladesh, a questionnaire survey was done on commercial banks and exporters. Besides, reading materials and secondary data on export financing from various sources were analyzed. As an apex body in the financial system, Bangladesh Bank plays an important role in export financing through its policy...
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Authors Syed Tanimul Haque, Faijun Nahar Mim, Md. Soyebur RahmanRead Journal Click Here
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Page No. 39 to 52
On Characterizing Generalized Cambanis Family of Bivariate Distributions
Published In: GJSFR Part: F: Mathematics & Decision Volume: 17 Issue: 1 In this work we present characterizations of a generalized version of Cambanis family of bivariate distributions. This family contains extensions of the Farlie-Gumbel-Morgenstern system as special cases. The characterizations are by properties of P(X>Y), regression functions and E(XjX > Y) which were found to be useful in many applications. ...
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Authors N. Unnikrishnan Nair, Johny Scaria, Sithara Mohan.Read Journal Click Here
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Page No. 31 to 38
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A Study on Sensitivity and Robustness of One Sample Test Statistics to Outliers
Published In: GJSFR Part: F: Mathematics & Decision Volume: 16 Issue: 6 Outliers are observations that stand too different from others in a set of observations. When present in a data set, they affect both descriptive and inferential statistics. This work therefore, studies the sensitivity and robustness of one sample test statistics to outliers so as to know the appropriate one to test hypothesis about the population parameter when outliers are present. One...
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Authors Kayode Ayinde, Taiwo Joel Adejumoand, Gbenga Sunday SolomonRead Journal Click Here
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Page No. 99 to 112
Pseudo Ricci-Symmetric (LCS)n-Manifolds
Published In: GJSFR Part: F: Mathematics & Decision Volume: 16 Issue: 6 The present paper deals with the study of pseudo Ricci symmetric properties on (LCS)n-manifolds. Here we study generalized pseudo Riccisymmetric, almost pseudo Ricci-symmetric and semi pseudo Ricci-symmetric (LCS)nmanifolds and obtained some interesting results. ...
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Authors N.S. Ravikumar, K. Nagana Gouda,Read Journal Click Here
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Page No. 71 to 77
Distribution Natural Waves in an Infinite Viscoelastic Cylinder with Radial Cracks and Wedges
Published In: GJSFR Part: F: Mathematics & Decision Volume: 16 Issue: 6 This paper deals with the distribution of natural waves of an infinite cylinder with radial crack and wedge. The task is put in cylindrical coordinates. Viscoelastic cylinder with radial crack is a limiting case of the wedge with an angle 3600 . With the help of the Navier equations and physical system received six differential equations. After not complicated conversion obtained spectra...
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Authors Safarov Ismail Ibrahimovich, Akhmedov Maqsud Sharipovich, Boltayev ZafarIxtiyarovichRead Journal Click Here
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Page No. 79 to 98
A Production Inventory Model for Deteriorating Products with Multiple Market and Selling Price Dependent Demand
Published In: GJSFR Part: F: Mathematics & Decision Volume: 16 Issue: 6 This paper presents an inventory model for deteriorating items that have a single manufacturer but multiple market demands for a finite planning horizon. For the market, different selling seasons are considered. It is a production inventory model, which has a demand rate dependent on the selling price. Here, we have presented a solution-search procedure to find the optimal replenishment ...
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Authors Pinky Saxena, S.R Singh, Isha SangalRead Journal Click Here
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Page No. 59 to 69