تصفح Qatar University Science Journal - [From 1981 TO 2007] حسب الموضوع "Mathematics"
السجلات المعروضة 1 -- 20 من 98
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A 6th-order local approximation by a cubic curve
( Qatar University , 1997 , Article)We derive and present a MAPLE program for the construction of a parametric cubic polynomial curve which has sixth-order contract with a given smooth curve at a given point, thus providing a local sixth-order approximation ... -
The Adjoint Problem Of A Modified Sturm-Liouville Boundary Value Problem
( Qatar University , 1993 , Article)The authors give the solutions of the eigenvalue equation that is associated with a modified Stum-Liouille problem. The discrete specturm and hence the resolvent will be obtained by means of different types of solutions ... -
Algebraic Approach to Formal Microstructure Sheaves and Formal Quantum Sheaves Over Projective Schemes
( Qatar University , 2007 , Article)The I-adic non-commutative filtrations have crucial applications in the study of Lie algebras and the integral group rings. The I-completion R of a commutative ring R is considered a useful tool in algebraic geometry. Here ... -
An Algorithm for the Consturction of Admissible Tests of the Weibull Distrbution
( Qatar University , 1999 , Article)The method of H. Al-Rawwash and J. Marden [2] is used here for the construction of an admissible test which dominates a given inadmissible one for testing hyupothesis about the Weibull distribution. The algorithm and its ... -
Approximate Solution For A Problem Of Propagation Of Elastic-Plastic Wave In The Half-Space
( Qatar University , 1984 , Article)In this paper, we consider a half-space occupying an elastic-plastic medium. Treatments were carried out under the assumption of perpendicular load, on boundary which propagates with a constant speed D. The assumption ... -
Approximating the Distribution of Quadratic Forms Using Orthogonal Polynomials
( Qatar University , 1999 , Article)In this paper we propose some techniques to approximate the distribution of quadratic forms in normal random variables. The first two techniques will be based on orthogonal polynomials, namely; the Hermitte and Laguerre ... -
An Approximation Leading To The Binomial Distribution In The Stochastic Treatment Of A Reversible Chemical Reaction
( Qatar University , 1992 , Article)The exact equilibrium distribution of the number of molecules of C in the reversible chemical reaction A+B ^=S: C is shown to converge to the binomial distribution when N is finite, M—»!K, K—>0 in such a way that KM is ... -
The Backlund Transformation Of A Kp-Like Class Of Nonlinear Partial Differential Equations
( Qatar University , 1996 , Article)The Backlund transformation of a class that behaves in a manner similar to that of the Kadometsev-Petviashli is derived via the use of a transformation that couples this class with a modified given class of the same order. ... -
Bayes Estimation of the Parameter of Burr Type II Distribution in Case of Type II Censoring
( Qatar University , 1997 , Article)Suppose that Xj, X2, ..., Xn is a random sample of failure times from a Burr type II (B2) distribution with parameter 9. Let x = (xj, x2, , xr) with xj < x2 S x3 < < xr be the observed failure censored sample of the first ... -
A Class Of Functions Stronger Than M-Precontinuity, Preirresolute And A-Functions
( Qatar University , 1990 , Article)We propose a definition for a new class of functions that may be stronger than the previous types. Some of its characterizations, connections with known ones and the effect of them on some topological spaces are studied . -
Cleavability of Decomposition Spaces
( Qatar University , 2006 , Article)Assume that X and Y have the same homotopy type, if X (respectively Y) is cleavable over p, have proved that the decomposition space of Y/g (respectively X/f) is cleavable over p. A result ncerning Arhangel'skii - Teroni's ... -
Collineations Of Polar Spaces
( Qatar University , 1990 , Article)In this paper we consider general embeddable polar spaces with Witt index at least three. If π : S( ξ) —> S( ξ’) be a thick collineation between polar spaces with i( ξ) =i( ξ’) ≥3. Then there exists a place Ø: k—> k' U ... -
Completeness Of Distributive P-Algebras
( Qatar University , 1988 , Article)According to the triple characterization of distributive p-algebras which is given by T. Katrinak, we characterize the completeness of distributive p-algebras. -
Concerning Sequential Spaces
( Qatar University , 1985 , Article)In this paper, important notions concerning sequential spaces are clarified new ideas, one of which is a complete and direct proof of the fundamental theorem characterizing sequential spaces, are introduced. -
Conditionally Exponential Convex Functions On Locally Compact Groups
( Qatar University , 1993 , Article)The main objectives of this study are: 1) The construction of a compact base for the convex cone of all conditionally exponential convex functions. The determination of the extreme parts of this cone. -
Decomposition of a Special Type of Machines
( Qatar University , 1994 , Article)In this paper, the concept of a finite n-state cyclic machine An is defined. These machines are then completely characterized using the prime factorization of n. Specifically, it is proved that any finite-state cyclic machine -
Decomposition Of The Set Of Conditionally Exponential Convex Functions
( Qatar University , 1993 , Article)The theory of C* -algebra is used to develop a connection between the local extreme points and the topology of the spectrum space G. -
Diagonalizable Indefinite Integral Quadratic Forms
( Qatar University , 1991 , Article)This paper deals with some special cases on Hasse's principle about the diagonalization of Z-lattices L of indefinite regular guadratic forms over Q. It is asserted that for some specific values of a certain set D of ... -
Diffusion Problems Arising In Mathematical Biology 2
( Qatar University , 1996 , Article)In this paper we consider long range diffusion, examine the local behavior of epidemics in Lp'q. In section 1 of chapter 2 we develop a model, the long range diffusion pressure in planktonic patchiness and then in secion ... -
Elliptic surfaces over a genus 1 curve with exactly the pair (I8, IV) of singular fibers
( Qatar University , 2000 , Article)In this paper we classify all minimal elliptic surfaces (TI : E —> C) over a genus 1 curve C, with a section and exactly the pair (Is, IV) of singular fibers.