


Paper's Title:
An Algorithm to Compute GaussianType Quadrature Formulae
that Integrate Polynomials and Some Spline Functions Exactly
Author(s):
Allal Guessab
Laboratoire de Mathématiques Appliquées,
Université de Pau, 64000, Pau,
France.
allal.guessab@univpau.fr
URL: http://www.univpau.fr/~aguessab/
Abstract:
It is wellknown that for sufficiently smooth integrands on an interval, numerical integration can be performed stably and efficiently via the classical (polynomial) Gauss quadrature formulae. However, for many other sets of integrands these quadrature formulae do not perform well. A very natural way of avoiding this problem is to include a wide class among arbitrary functions (not necessary polynomials) to be integrated exactly. The spline functions are natural candidates for such problems. In this paper, after studying Gaussian type quadrature formulae which are exact for spline functions and which contain boundary terms involving derivatives at both end points, we present a fast algorithm for computing their nodes and weights. It is also shown, taking advantage of the close connection with ordinary Gauss quadrature formula, that the latter are computed, via eigenvalues and eigenvectors of real symmetric tridiagonal matrices. Hence a new class of quadrature formulae can then be computed directly by standard software for ordinary Gauss quadrature formula. Comparative results with classical Gauss quadrature formulae are given to illustrate the numerical performance of the approach.
Paper's Title:
Ostrowski Type Inequalities for Lebesgue Integral: a Survey of Recent Results
Author(s):
Sever S. Dragomir^{1,2}
^{1}Mathematics, School of Engineering
& Science
Victoria University, PO Box 14428
Melbourne City, MC 8001,
Australia
Email: sever.dragomir@vu.edu.au
^{2}DSTNRF Centre of Excellence in the Mathematical and Statistical Sciences,
School of Computer Science & Applied Mathematics,
University of the Witwatersrand,
Private Bag 3, Johannesburg 2050,
South Africa
URL:
http://rgmia.org/dragomir
Abstract:
The main aim of this survey is to present recent results concerning Ostrowski type inequalities for the Lebesgue integral of various classes of complex and realvalued functions. The survey is intended for use by both researchers in various fields of Classical and Modern Analysis and Mathematical Inequalities and their Applications, domains which have grown exponentially in the last decade, as well as by postgraduate students and scientists applying inequalities in their specific areas.
Paper's Title:
Bounds for Two Mappings Associated to the HermiteHadamard Inequality
Author(s):
S. S. Dragomir^{1,2} and I. Gomm^{1}
^{1}Mathematics, School of Engineering & Science,
Victoria University,
PO Box 14428,
Melbourne City, MC 8001,
Australia.
^{2}School of Computational & Applied Mathematics,
University of
the Witwatersrand,
Private Bag 3, Johannesburg 2050,
South Africa.
sever.dragomir@vu.edu.au
ian.gomm@vu.edu.au
URL: http://rgmia.org/dragomir
Abstract:
Some inequalities concerning two mappings associated to the celebrated HermiteHadamard integral inequality for convex function with applications for special means are given.
Paper's Title:
Further Bounds for Two Mappings Related to the HermiteHadamard Inequality
Author(s):
S. S. Dragomir^{1,2} and I. Gomm^{1}
^{1}Mathematics, School of Engineering & Science,
Victoria University,
PO Box 14428,
Melbourne City, MC 8001,
Australia.
^{2}School of Computational & Applied Mathematics,
University of
the Witwatersrand,
Private Bag 3, Johannesburg 2050,
South Africa.
sever.dragomir@vu.edu.au
ian.gomm@vu.edu.au
URL: http://rgmia.org/dragomir
Abstract:
Some new results concerning two mappings associated to the celebrated HermiteHadamard integral inequality for twice differentiable functions with applications for special means are given.
Paper's Title:
Some Applications of Fejér's Inequality for Convex Functions (I)
Author(s):
S.S. Dragomir^{1,2} and I. Gomm^{1}
^{1}Mathematics, School of
Engineering & Science
Victoria University, PO Box 14428
Melbourne City, MC 8001,
Australia.
URL: http://rgmia.org/dragomir
^{2}School of Computational &
Applied Mathematics,
University of the Witwatersrand,
Private Bag 3, Johannesburg 2050,
South Africa.
Abstract:
Some applications of Fejér's inequality for convex functions are explored. Upper and lower bounds for the weighted integral
under various assumptions for f with applications to the trapezoidal quadrature rule are given. Some inequalities for special means are also provided
Paper's Title:
Inequalities for the Area Balance of Functions of Bounded Variation
Author(s):
Sever S. Dragomir^{1,2}
^{1}Mathematics, School of Engineering
& Science
Victoria University, PO Box 14428
Melbourne City, MC 8001,
Australia
Email: sever.dragomir@vu.edu.au
^{2}DSTNRF Centre of Excellence in the Mathematical and Statistical Sciences,
School of Computer Science & Applied Mathematics,
University of the Witwatersrand,
Private Bag 3, Johannesburg 2050,
South Africa
URL:
http://rgmia.org/dragomir
Abstract:
We introduce the area balance function associated to a Lebesgue
integrable function f:[a,b] →C by
Several sharp bounds for functions of bounded variation are provided. Applications for Lipschitzian and convex functions are also given.
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