نتایج جستجو برای: multivalued f

تعداد نتایج: 307838  

Recently‎, some researchers have established some results on existence of endpoints for multivalued mappings. In particular, Mohammadi and Rezapour's [Endpoints of Suzuki type quasi-contractive multifunctions, U.P.B. Sci. Bull., Series A, 2015] used the technique of $alpha-psi$-contractive mappings, due to Samet et al. (2012), to give some results about endpoints of Suzuki type quasi-contractiv...

2006
Marco Baioletti Alfredo Milani Valentina Poggioni Silvia Suriani

In this work a model for planning with multivalued fluents and graded actions, based on the infinite valued Lukasiewicz logic, is introduced. In multivalued planning, fluents can assume truth values in the interval [0, 1] and actions can be executed at different application degrees also varying in [0, 1]. The notions of planning problem and solution plan also reflect a multivalued approach. Mul...

2008
Abdelkader Boucherif

Let be a an open bounded domain in R , N 2; with a smooth boundary @ ; and T > 0. De…ne D = (0; T ) and = @ [0; T ]: In this paper we are concerned with the existence of solutions of the following parabolic inclusion ut + Lu 2 F (x; t; u), (x; t) 2 D; u(x; t) = 0; (x; t) 2 subjected to the nonlocal condition u(x; 0) = R T 0 g(x; t; u(x; t))dt for x 2 : We provide su¢ cient conditions on L; F; g...

Journal: :Acta Applicandae Mathematicae 2021

Abstract We consider nonlinear systems driven by a general nonhomogeneous differential operator with various types of boundary conditions and reaction in which we have the combined effects maximal monotone term $A(x)$ A ( x ) multivalued perturbation $F(t,x,y...

1997
TOMASZ KACZYNSKI

The deenitions of isolating block, index pair, and the Conley index, together with the proof of homotopy and additivity properties of the index are generalized for discrete multivalued dynamical systems. That generalization provides a theoretical background of numerical computation used by Mischaikow and Mrozek in their computer assisted proof of chaos in the Lorenz equations, where nitely repr...

1984
Catriel Beeri Michael Kifer

We propose a new approach to the design of relational database schemes. The main features of the approach are: (4 A combination of the traditional decomposition and synthesis approaches, thus allowing the use of both functional and multivalued dependencies. (b) Separation of structural dependencies relevant for the design process from integrity constraints, i.e., constraints that do not bear an...

Journal: :bulletin of the iranian mathematical society 2013
a. abkar m. eslamian

in this paper, we present some common fixed point theorems for two generalized nonexpansive multivalued mappings in cat(0) spaces as well as in uced banach spaces. moreover, we prove the existence of fixed points for generalized nonexpansive multivalued mappings in complete geodesic metric spaces with convex metric for which the asymptotic center of a bounded sequence in a bounded closed convex...

Journal: :Int. J. Math. Mathematical Sciences 2012
Ismat Beg Hemant Kumar Nashine

The purpose of this paper is to prove end-point theorems for multivalued mappings satisfying comparatively a more general contractive condition in ordered complete metric spaces. Afterwards, we extend the results of previous sections and prove common end-point results for a pair of T-weakly isotone increasing multivalued mappings in the underlying spaces. Finally, we present common end point fo...

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