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Dive into the research topics where Nawitcha Onjai-uea is active.

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Featured researches published by Nawitcha Onjai-uea.


Journal of Inequalities and Applications | 2010

A Generalized Nonlinear Random Equations with Random Fuzzy Mappings in Uniformly Smooth Banach Spaces

Nawitcha Onjai-uea; Poom Kumam

We introduce and study the general nonlinear random -accretive equations with random fuzzy mappings. By using the resolvent technique for the -accretive operators, we prove the existence theorems and convergence theorems of the generalized random iterative algorithm for this nonlinear random equations with random fuzzy mappings in -uniformly smooth Banach spaces. Our result in this paper improves and generalizes some known corresponding results in the literature.


Journal of Inequalities and Applications | 2012

Existence and convergence theorems for the new system of generalized mixed variational inequalities in Banach spaces

Nawitcha Onjai-uea; Poom Kumam

In this article, we introduce and consider the three-step iterative algorithms for solving a new system of generalized mixed variational inequalities involving different three multi-valued operators. In this study, we use a generalized f-projection method for finding the solutions of generalized system of mixed variational inequalities in Banach spaces. Our result in this article improves and generalizes some known corresponding results in the literature.2000 Mathematics Subject Classification: 47H10; 47H19; 49J40.


Fixed Point Theory and Applications | 2011

Algorithms of Common Solutions to Generalized Mixed Equilibrium Problems and a System of Quasivariational Inclusions for Two Difference Nonlinear Operators in Banach Spaces

Nawitcha Onjai-uea; Poom Kumam

We consider a new iterative algorithm for finding a common element of the set of generalized mixed equilibrium problems, the set of solutions of a system of quasivariational inclusions for two difference inverse strongly accretive operators, and common set of fixed points for strict pseudo-contraction mappings in Banach spaces. Furthermore, strong convergence theorems of this method were established under suitable assumptions imposed on the algorithm parameters. The results obtained in this paper improve and extend some results in the literature.


Journal of Inequalities and Applications | 2012

Convergence of iterative sequences for fixed points of an infinite family of nonexpansive mappings based on a hybrid steepest descent methods

Nawitcha Onjai-uea; Chaichana Jaiboon; Poom Kumam; Usa Humphries

The propose of this article is to consider the strong convergence of an iterative sequences for finding a common element of the set of fixed points of an infinite family of nonexpansive mappings, the set of solutions of the variational inequalities for inverse strongly monotone mappings, and the set of solutions of system of equilibrium problems in Hilbert spaces by using a hybrid steepest descent methods. Our results improve and generalize many known corresponding results.AMS (2000) Subject Classification: 46C05; 47H09; 47H10.


Fixed Point Theory and Applications | 2012

A new iterative scheme for equilibrium problems, fixed point problems for nonexpansive mappings and maximal monotone operators

Nawitcha Onjai-uea; Poom Kumam

In this article, we introduce a new iterative scheme for finding a common element of the set of fixed points of strongly relatively nonexpansive mapping, the set of solutions for equilibrium problems and the set of zero points of maximal monotone operators in a uniformly smooth and uniformly convex Banach space. Consequently, we obtain new strong convergence theorems in the frame work of Banach spaces. Our theorems extend and improve the recent results of Wei et al., Takahashi and Zembayashi, and some recent results.


Fixed Point Theory and Applications | 2011

A relaxed hybrid steepest descent method for common solutions of generalized mixed equilibrium problems and fixed point problems

Nawitcha Onjai-uea; Chaichana Jaiboon; Poom Kumam

In the setting of Hilbert spaces, we introduce a relaxed hybrid steepest descent method for finding a common element of the set of fixed points of a nonexpansive mapping, the set of solutions of a variational inequality for an inverse strongly monotone mapping and the set of solutions of generalized mixed equilibrium problems. We prove the strong convergence of the method to the unique solution of a suitable variational inequality. The results obtained in this article improve and extend the corresponding results.AMS (2000) Subject Classification: 46C05; 47H09; 47H10.


Fixed Point Theory and Applications | 2012

Strong convergence theorems for solving a general system of finite variational inequalities for finite accretive operators and fixed points of nonexpansive semigroups with weak contraction mappings

Nawitcha Onjai-uea; Phayap Katchang; Poom Kumam

In this paper, we prove a strong convergence theorem for finding a common solution of a general system of finite variational inequalities for finite different inverse-strongly accretive operators and solutions of fixed point problems for a nonexpansive semigroup in a Banach space based on a viscosity approximation method by using weak contraction mappings. Moreover, we can apply the above results to find the solutions of the class of k-strictly pseudocontractive mappings and apply a general system of finite variational inequalities into a Hilbert space. The results presented in this paper extend and improve the corresponding results of Ceng et al. (2008), Katchang and Kumam (2011), Wangkeeree and Preechasilp (2012), Yao et al. (2010) and many other authors.MSC:47H05, 47H10, 47J25.


Journal of Inequalities and Applications | 2017

On solving split mixed equilibrium problems and fixed point problems of hybrid-type multivalued mappings in Hilbert spaces

Nawitcha Onjai-uea; Withun Phuengrattana

In this paper, we introduce and study iterative algorithms for solving split mixed equilibrium problems and fixed point problems of λ-hybrid multivalued mappings in real Hilbert spaces and prove that the proposed iterative algorithm converges weakly to a common solution of the considered problems. We also provide an example to illustrate the convergence behavior of the proposed iteration process.


Mediterranean Journal of Mathematics | 2018

Modified Proximal Point Algorithms for Solving Constrained Minimization and Fixed Point Problems in Complete CAT(0) Spaces

Withun Phuengrattana; Nawitcha Onjai-uea; Prasit Cholamjiak


Fixed Point Theory and Applications | 2015

A hybrid iterative method for common solutions of variational inequality problems and fixed point problems for single-valued and multi-valued mappings with applications

Nawitcha Onjai-uea; Withun Phuengrattana

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Poom Kumam

King Mongkut's University of Technology Thonburi

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Chaichana Jaiboon

Rajamangala University of Technology

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Phayap Katchang

King Mongkut's University of Technology Thonburi

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Usa Humphries

King Mongkut's University of Technology Thonburi

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