Variational-Like Inclusions and Resolvent Equations Involving Infinite Family of Set-Valued Mappings
© Rais Ahmad and Mohd Dilshad. 2011
Received: 18 December 2010
Accepted: 23 December 2010
Published: 29 December 2010
We study variational-like inclusions involving infinite family of set-valued mappings and their equivalence with resolvent equations. It is established that variational-like inclusions in real Banach spaces are equivalent to fixed point problems. This equivalence is used to suggest an iterative algorithm for solving resolvent equations. Some examples are constructed.
The important generalization of variational inequalities, called variational inclusions, have been extensively studied and generalized in different directions to study a wide class of problems arising in mechanics, optimization, nonlinear programming, economics, finance and applied sciences, and so forth; see, for example [1–7] and references theirin. The resolvent operator technique for solving variational inequalities and variational inclusions is interesting and important. The resolvent operator technique is used to establish an equivalence between variational inequalities and resolvent equations. The resolvent equation technique is used to develop powerful and efficient numerical techniques for solving various classes of variational inequalities (inclusions) and related optimization problems.
In this paper, we established a relationship between variational-like inclusions and resolvent equations. We propose an iterative algorithm for computing the approximate solutions which converge to exact solution of considered resolvent equations. Some examples are constructed.
2. Formulation and Preliminaries
Similarly, we can define Lipschitz continuity in the second argument.
Proposition 2.6 (see ).
Let , be an infinite family of set-valued mappings, and let be a nonlinear mapping. Let ; be single-valued mappings, let and be set-valued mappings. Suppose that is -accretive mapping in the first argument. We consider the following problem.
The problem (2.14) is called variational-like inclusions problem.
Problem (2.15) is introduced and studied by Wang .
It is now clear that for a suitable choice of maps involved in the formulation of problem (2.14), we can drive many known variational inclusions considered and studied in the literature.
In connection with problem (2.14), we consider the following resolvent equation problem.
where is a constant and , where and is the identity mapping. Equation (2.17) is called the resolvent equation problem.
In support of problem (2.17), we have the following example.
3. An Iterative Algorithm and Convergence Result
We mention the following equivalence between the problem (2.14) and a fixed point problem which can be easily proved by using the definition of resolvent operator.
Now, we show that the problem (2.14) is equivalent to a resolvent equation problem.
We now invoke Lemmas 3.1 and 3.2 to suggest the following iterative algorithm for solving resolvent equation problem (2.17).
Continuing the above process inductively, we obtain the following.
From (3.22), we have , and consequently is a Cauchy sequence in . Since is a Banach space, there exists such that . From (3.28), we know that is also a Cauchy sequence in . Therefore, there exists such that . Since the mappings 's, , and are -Lipschitz continuous, it follows from (3.16)–(3.19) of Algorithm 3.3 that , , , and are also Cauchy sequences. We can assume that , , , and .
This work is supported by Department of Science and Technology, Government of India, under Grant no. SR/S4/MS: 577/09.
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