


Paper's Title:
Some interesting properties of finite continuous Cesàro operators
Author(s):
Abdelouahab Mansour and Abderrazak Hechifa
Operator theory laboratory (LABTHOP),
Eloued University,
Algeria.
Email:
amansour@math.univlyon1.fr
Mathematics Department,
Faculty of Science,
Badji Mokhtar University, Annaba,
Algeria.
Email:
abderrazak02@gmail.com
Abstract:
A complex scalar λ is called an extended eigenvalue of a bounded linear operator T on a complex Banach space if there is a nonzero operator X such that TX = λ XT, the operator X is called extended eigenoperator of T corresponding to the extended eigenvalue λ.
In this paper we prove some properties of extended eigenvalue and extended eigenoperator for C_{1} on L^{p}([0,1]), where C_{1} is the Cesàro operator defined on the complex Banach spaces L^{p}([0 , 1]) for 1<p<∞ by the expression
Paper's Title:
Formulation of Approximate Mathematical Model for Incoming Water to Some Dams on Tigris and Euphrates Rivers Using Spline Function
Author(s):
Nadia M. J. Ibrahem, Heba A. Abd AlRazak, and Muna M. Mustafa
Mathematics Department,
College of Sciences for Women,
University of Baghdad, Baghdad,
Iraq.
Email:
Nadiamj_math@csw.uobaghdad.edu.iq
Abstract:
In this paper, we formulate three mathematical models using spline functions, such as linear, quadratic and cubic functions to approximate the mathematical model for incoming water to some dams. We will implement this model on dams of both rivers; dams on the Tigris are Mosul and Amara while dams on the Euphrates are Hadetha and AlHindya.
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