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

OTHA Spring 2026 video lectures are available on Internet
The videos of plenary lectures from OTHA-Spring 2026 are available online on the OTHA conference channel.

Operator Theory and Harmonic Analysis "OTHA Spring 2026" in Armenia
From April 26 to 30, the international conference "Workshop OTHA Spring 2026" was held at the Institute of Mathematics (Yerevan). The Workshop OTHA Spring 2026 was held in collaboration with the Institute of Mathematics (Yerevan). The organizers and co-chairs of the organizing committee were A.N. Karapetyants and R.G. Aramyan.

A research seminar in Italy, Perugia
Alexey Karapetyants and Vladislav Kravchenko, delivered lectures at the University of Perugia in Italy.

OTHA research network: calls for papers
The international OTHA research network presents following special issues in peer-reviewed journals from Springer and Wiley, (Q1–Q3). The topics cover asymptotic analysis, optimization, machine learning, stochastics, generative models, inverse problems, operator theory, harmonic analysis, and a celebratory issue dedicated to the 85th anniversary of Professor Stefan Samko. Details and webpages for the special issues are below.

Special issue in the "Boletín de la Sociedad Matemática Mexicana"
Special issue "Asymptotics, optimization and machine learning" in the"Boletín de la Sociedad Matemática Mexicana" is dedicated to modern trends at the intersection of asymptotic analysis, optimization, and machine learning.

OTHA Fall 2025 video lectures are available on Internet
The videos of plenary lectures from the OTHA-Fall 2025 are available online on the OTHA conference channel.

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.