https://ph03.tci-thaijo.org/index.php/jnao <p><strong>Journal of Nonlinear Analysis and Optimization: Theory &amp; Applications</strong> is a peer-reviewed, open-access international journal, that devotes to the publication of original articles of current interest in every theoretical, computational, and applicational aspect of nonlinear analysis, convex analysis, fixed point theory, and optimization techniques and their applications to science and engineering. All manuscripts are refereed under the same standards as those used by the finest-quality printed mathematical journals. Accepted papers will be published in two issues annually in June and December, free of charge. This journal was conceived as the main scientific publication of the Center of Excellence in Nonlinear Analysis and Optimization, Naresuan University, Thailand.</p> Center of Excellence in Nonlinear Analysis and Optimization, Naresuan University, Phitsanulok 65000 Thailand en-US Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) 1906-9685 <p>Copyright (c) 2010 Journal of Nonlinear Analysis and Optimization: Theory &amp; Applications</p> <p><img src="https://i.creativecommons.org/l/by-nc-nd/4.0/88x31.png" alt="Creative Commons License" /></p> <p>This work is licensed under aย <a href="https://creativecommons.org/licenses/by-nc-nd/4.0/" rel="license">Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License</a>.</p> https://ph03.tci-thaijo.org/index.php/jnao/article/view/2773 <div class="page" title="Page 1"> <div class="layoutArea"> <div class="column"> <p>In this paper, we introduce the concept of a b-metric-like space, which is an intriguing extension of the b-metric space, and it encompasses certain sufficient conditions for the existence of a common fixed point. The discoveries presented here build upon and broaden previous research in this area..</p> </div> </div> </div> AREERAT ARUNCHAI MATHINI MUANGCHAI BOONYARIT NGEONKAM Copyright (c) 2024 Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) https://creativecommons.org/licenses/by-nc-nd/4.0 2023-03-31 2023-03-31 14 1 1 10 https://ph03.tci-thaijo.org/index.php/jnao/article/view/2774 <div class="page" title="Page 1"> <div class="layoutArea"> <div class="column"> <p>We explore the Geraghty contraction through a simulation function, eluci- dating certain conditions for the existence and uniqueness of coincidence points for multi- class mappings involving the Geraghty function in metric spaces. The results presented in this work are consistent with those found in existing literature.</p> </div> </div> </div> PHEERACHATE BUNPATCHARACHAROEN WARUT KITCHAROEN Copyright (c) 2024 Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) https://creativecommons.org/licenses/by-nc-nd/4.0 2023-03-31 2023-03-31 14 1 11 20 https://ph03.tci-thaijo.org/index.php/jnao/article/view/2775 <div class="page" title="Page 1"> <div class="layoutArea"> <div class="column"> <p>In this paper, we propose an iterative algorithm designed to address the minimization and fixed point problems associated with total asymptotically nonexpansive mappings in CAT(0) spaces. We establish strong convergence theorems and △-convergence theorems for solving these problems. Furthermore, we apply the key findings to solve the equilibrium problem in CAT(0) spaces.</p> </div> </div> </div> JIRAPORN LIMPRAYOON Copyright (c) 2024 Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) https://creativecommons.org/licenses/by-nc-nd/4.0 2023-03-31 2023-03-31 14 1 21 31