Scope:
This special issue of the Journal of Optimization Theory and Applications is devoted to new developments in the fields of continuous optimization and variational analysis presented at the Spring School and Workshop on Variational Analysis and Optimization 2025 (ICOVAO-25). Organized by the Vietnam Institute for Advanced Study in Mathematics (VIASM), the Vietnam Academy of Sciences and Technology, and the Hanoi Pedagogical University 2 in Hanoi in March 2025, this event aimed at strengthening the collaboration between the optimization communities from Vietnam and the rest of the world, and at exposing young Vietnamese optimizers to the newest advances in the field. Contributions are expected from all participants on topics spreading from convex and nonconvex optimization, variational analysis, equilibrium problems, vector and set-valued optimization and (splitting) proximal point type algorithms to applications in different fields such as engineering, mathematical finances, machine learning and artificial intelligence, among others. Related papers from other experts in these fields are equally welcome.
Guest Editors
Sorin-Mihai Grad, ENSTA Paris/Polytechnic Institute of Paris (Palaiseau, France), sorin-mihai.grad@ensta.fr
Nicolas Hadjisavvas,University of the Aegean (Syros, Greece), nhad@aegean.gr
Felipe Lara, University of Tarapacá (Arica, Chile), flarao@academicos.uta.cl
Boris Mordukhovich,Wayne State University (Detroit, United States), boris@math.wayne.edu
Nguyen Van Tuyen, Hanoi Pedagogical University 2 (Phuc Yen, Vietnam), nguyenvantuyen83@hpu2.edu.vn
Nguyen Dong Yen, Vietnam Academy of Science and Technology (Hanoi, Vietnam), ndyen@math.ac.vn
Announcement date: April 15, 2025
Submission deadline: December 31st, 2025
Scope/Rationale:
In the past decades, copositivity gained popularity as a key concept for optimization, which can handle nonconvex, mixed-integer and polynomial optimization problems. On occasion of the 75th anniversary of copositivity (2027), we are aiming to cover the area in a comprehensive and concise way and expect this collection to become a major reference source for researchers and teachers in mathematics, computer science, engineering and economics. The purpose of this collection is manifold: to collect as many reliable historical facts about the early days of copositivity as possible, to present an overview of the diverse streams of research since then, and to provide an up-to-date survey of recent advances and future perspectives, with a scope as comprehensive as possible. In particular, we welcome submissions focusing on computationally tractable procedures, involving ideas from copositivity.
Tentative Schedule
Announcement Date: 1 March 2025
Submission deadline: 31 March 2026
First Round of Reviews: 30 September 2026
Targeted Publication Date: 15 June 2027
Guest Editors
Petra Renáta Rigó (Lead Guest Editor) petra.rigo@uni-corvinus.hu
Immanuel Bomze immanuel.bomze@univie.ac.at
Mirjam Dür mirjam.duer@math.uni-augsburg.de
Marianna E.-Nagy marianna.eisenberg-nagy@uni-corvinus.hu
Tibor Illés illes@math.bme.hu
Note: The issue will be based on invitation of selected contributors.
Other submissions will be rejected or transferred to regular submissions.
Prof. Q. H. Ansari’s work significantly advances the fields of optimization, variational inequalities, and game theory, with particular contributions to non-smooth analysis, convex analysis, and fixed-point theory.
His research has broad applications in economics, engineering, and applied mathematics, addressing both theoretical challenges and practical problems in these domains. The scope of his work spans vector optimization, set optimization, equilibrium problems, and abstract economies, making a profound impact on optimization theory and its interdisciplinary applications.
Honoring his work through this special issue acknowledges his impactful legacy and encourages further advancements in optimization and its diverse applications. The proposed special issue would focus on cutting-edge research in areas closely aligned with Prof. Ansari’s interests, including but not limited to:
Guest Editors:
Prof. Jen-Chih Yao, China Medical University, Taichung, Taiwan
Email: yaojc@math.nsysu.edu.tw
Prof. Hong-Kun Xu, Hangzhou Dianzi University, Hangzhou, China
Email: xuhk@hdu.edu.cn
Announcement Date: October 15, 2024
Submission deadline: March 15, 2025
Scope:
In recent decades, researchers have increasingly tackled with optimization challenges that defy resolution through conventional convex or monotonic frameworks, in view of applications in science, engineering and other disciplines. Consequently, novel methodologies are emerging in nonsmooth, variational, and convex analysis. This special issue aims to publish original high-quality papers centered around the broad area of convexity, monotonicity and their extensions, and variational analysis, in and beyond optimization. Thus, it sheds new light on classical results and opens new approaches to face ‘‘nonconvex problems’’ in both theoretical and practical scenarios. Some of the papers collected in the special issue will be presented at the XIV International Symposium on Generalized Convexity and Monotonicity, to be held on September 2-6, 2024, in Pisa, Italy. So that, other researchers working in the area will also be welcome to contribute.
Contributions may include, but are not limited to the following topics:
* Algorithms for fixed point, (quasi-) variational inequality and optimization problems;
* Quadratic optimization problems;
* (Quasi-) Variational inequalities, equilibrium problems and related topics;
* Robust optimization;
* Set optimization;
* Vector optimization.
Guest Editors:
Riccardo Cambini, University of Pisa, riccardo.cambini@unipi.it
Fabian Flores-Bazan, University of Concepcion, faflores@udec.cl
Nicolas Hadjisavvas, University of the Aegean, nhad@aegean.gr
Rita Pini, University of Milano – Bicocca, rita.pini@unimib.it
Timing:
Submission deadline: March 31, 2025
Targeted Publication Date: December 2025
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