We present results on extended convergence domains and their applications for the Newton-Kantorovich method (NKM), using the same information as in previous papers. Numerical examples are provided to emphasize that our results can be applied to solve nonlinear equations using (NKM), in contrast with earlier results which are not applicable in these cases. MSC 2010. 65J15, 65G99, 47H99, 49M15.

We prove that any Kantorovich potential for the cost function c = d/2 on a Riemannian manifold (M, g) is locally semiconvex in the “region of interest”, without any compactness assumption on M , nor any assumption on its curvature. Such a region of interest is of full μ-measure as soon as the starting measure μ does not charge n − 1-dimensional rectifiable sets.

We derive bounds on the variance of a random variable in terms of its arithmetic and harmonic means. Both discrete and continuous cases are considered, and an operator version is obtained. Some refinements of the Kantorovich inequality are obtained. Bounds for the largest and smallest eigenvalues of a positive definite matrix are also obtained.

In this study, we define a Kantorovich type generalization of W. MeyerKönig and K. Zeller operators and we will give the approximation properties of these operators with the help of Korovkin theorems. Then we compute the approximation order by modulus of continuity.

New modified Schurer-type q-Bernstein Kantorovich operators are introduced. The local theorem and statistical Korovkin-type approximation properties of these operators are investigated. Furthermore, the rate of approximation is examined in terms of the modulus of continuity and the elements of Lipschitz class functions.

It is shown that the problem of designing a two-reflector system transforming a plane wave front with given intensity into an output plane front with prescribed output intensity can be formulated and solved as the Monge-Kantorovich mass transfer problem1.

Given a sequence {xn}n=Q in a Banach space, it is well known that if there a sequence {r^J^—QSUch that Wxn+X — xn\\ < tn + x — tn and lim tn = t* < °°, then {xn}n=Q converges to some x* and the error bounds IIjc* — jc II < f* — tn hold. It is shown that certain stronger hypotheses imply sharper error bounds, ■**-*„« <—-—Jxn-Xn-X*11* * \'*1-'0|M" > »• Representative applications to infinite seri...

We transfer the celebrating Monge-Kontorovich problem in a bounded domain of Euclidean plane into a Dirichlet boundary problem associated to a quasi-linear elliptic equation with 0−order term missing in its diffusion coefficients: A(x, F ′ x )F ′′ xx +B(y, F ′ y )F ′′ yy = C(x, y, F ′ x , F ′ y ) where A(., .) > 0, B(., .) > 0 and C are functions based on the initial distributions, F is an unkn...