Modern Methods, Problems and Applications of Operator Theory and Harmonic Analysis

A Special Issue dedicated to the 85 anniversary of Professor Stefan Samko
We are delighted to announce a Special Issue celebrating the 85th birthday of our esteemed teacher, colleague, and friend, Professor Stefan Samko (Russia/Portugal).

One more special issue dedicated to the mathematical foundations of AI
A special issue in the Journal of Mathematical Sciences (Springer Nature) is now open for submissions. This issue is intended for publication on the mathematical foundations of artificial intelligence.

The OTHA International Scientific Group summarizes the 2025 year
The International Research Network on Operator Theory and Harmonic Analysis (OTHA) summarizes the activities of 2025 in the annual bulletin of the ISAAC scientific society and in the OTHA Research Network Bulletin.

OTHA Fall Workshop 2025
From December 14th to 18th, the international conference "Workshop OTHA Fall 2025" was held in Sochi (Sirius). This event was followed by a satellite session in Rostov-on-Don.

Special Issue: “Inverse Problems, Numerical Methods and Artificial Intelligence” in the journal “Mathematical Methods in the Applied Sciences” (Wiley)
We are happy to announce the Special Issue “Inverse Problems, Numerical Methods and Artificial Intelligence” in the journal “Mathematical Methods in the Applied Sciences”. Editors: Academician A. Avetisyan, Professors E. Burnaev, A. Karapetyants, and V.Kravchenko.

The book by A.Karapetyants and V.Kravchenko' is once again on BookAuthority's list of best books
A book by A.Karapetyants and V.Kravchenko has once again been included in BookAuthority's list of best books for classical and modern methods. The results were published in 2025 on bookauthority.org under the title "8 Books on Mathematical Physics Every Beginner Needs for Success."

Open Editorial Board and some more in the Georgian National Academy of Sciences
In collaboration with Springer Nature and the Georgian National Academy of Sciences, a series of joint events were held on October 9–10, 2025, in the Presidium Hall of the Georgian National Academy of Sciences. These included an editorial board meeting, a roundtable discussion on AI, and a scientific seminar.

OTHA-2025: Celebrating the Crystal Anniversary of OTHA conferences
This year the OTHA conference series celebrates its 15th (crystal) anniversary. The conference was also dedicated to the celebration of the 110th anniversary of SFedU.

The International Seminar "Seminar on Analysis, Differential Equations and Mathematical Physics" celebrated its fifth anniversary
The seminar leaders are A.N. Karapetyants and V.V. Kravchenko. An anniversary brochure on the seminar has been prepared for the anniversary date.

Celebrating the Crystal Anniversary: the OTHA 2011-2025 brochure
Celebrating the 15th anniversary, an information brochure was prepared, revealing the history of OTHA conferences/workshops from 2011 to 2025.

Videolectures of plenary talks from the OTHA-Spring-2025 in Yerevan
Based on the results of the international scientific workshop OTHA Spring 2025 (held at the Institute of Mathematics of the National Academy of Sciences of Armenia, Yerevan), a series of video recordings of plenary lectures has been prepared and uploaded on the Internet.

A special issue dedicated to the 90th anniversary of academician Albert Shiryaev
In 2025, a special issue was published in Journal of Mathematical Sciences (2025, volume 289, issue 3) dedicated to the 90th anniversary of the academician Albert Shiryaev.

The book by Alexey Karapetyants and Vladislav Kravchenko is in the list of the books recommended by the international society ISNMP.
The book "Methods of Mathematical Physics": Classical and Modern", Birkhäuser, 2022, by Alexey Karapetyants and Vladislav Kravchenko is in the list of the books recommended by the International Society of Nonlinear Mathematical Physics (ISNMP).

The international conference "Workshop OTHA Spring 2025"
The international conference "Workshop OTHA Spring 2025" was held at the Institute of Mathematics of the National Academy of Sciences of Armenia (Yerevan) from April 27 to May 2, 2025. Co-chairs are Alexey Karapetyants and Rafik Aramyan.

A special issue “Operator Theory and Harmonic Analysis” in the Lobachevskii Journal of Mathematics
Based on the activities of the OTHA Spring – 2024 Workshop (Armenia, Yerevan, April 21-24, 2024), a special issue “Operator Theory and Harmonic Analysis” was published in the Lobachevskii Journal of Mathematics.

55th anniversary of Professor Oleg G. Avsyankin
Professor Avsyankin Oleg, Doctor of Physics and Mathematical Sciences, Head of the Department of Differential and Integral Equations and Chief Researcher of the Regional Mathematical Center of the Southern Federal University, celebrated 55th anniversary.

Classical book on fractional calculus is translated into Chinese
Chinese mathematician and very good partner of OTHA activities and events Professor Changping Li translated an encyclopedic book on fractional calculus into Chinese. We are talking about the book "Fractional Integrals and Derivatives", published by Taylor & Francis, December 8, 1993.

OTHA research group at the international conference ICMS25 at the AUS-Emirates
Special Session on “Operator Theory and Harmonic Analysis” was organized within the Fourth International Conference on Mathematics and Statistics (ICMS25) was held at American University of Sharjah, OAE (20-22 February 2025).

Dr. Lady Estefania Murcia Lozano (Mexico) joined us as visiting researcher
Dr. Estefania Murcia is a young researcher (PhD) in the field of inverse problems, she defended her thesis at CINESTAV (Mexico) under the supervision of Professor Vladislav Kravchenko.

Sirius Educational Center in Sochi hosted the international conference “Workshop OTHA Fall 2024”
From December 15 to 19, the Sirius Educational Center in Sochi hosted the international conference “Workshop OTHA Fall 2024”.
The conference is attended by leading experts and young scientists from Moscow, St. Petersburg, Rostov-on-Don, Kazan, Vladikavkaz, Algeria, Belarus, Spain, China, Mexico, the UAE, Pakistan, Palestine, and Serbia.