Skip to main content
Home
envelope
ՀայերենРусскийEnglish

Main Navigation (Eng)

  • Admission
    • Undergraduate admission
    • Master’s degree admission
    • Postgraduate admission
    • Foreign Students
    • Preparatory courses
    • Work Carried out with Applicants
    • YSU STEM High School
  • Education
    • Guide Book for First Year Students
    • Educational programs
    • Granting qualification of a pedagogue
    • Center for Academic Writing
    • Continuing education
    • Academic Calendar
  • Science
    • Open science
    • Conferences
    • Library
    • Grants
    • Publishing House
    • Doctoral Thesis Defence Councils
    • HRS4R
  • News and events
    • Events
    • Activities
    • News
    • Newsletter
    • Announcement
    • Photo gallery
    • Video gallery

Secondary Navigation (Eng)

  • About YSU
    • YSU Management
    • YSU Symbols
    • YSU International Cooperation
    • Quality assurance
    • YSU History Museum
    • Vacancies
    • FAQ
  • Structure
    • YSU Faculties and Educational Centers
      • Faculty of Geography and Geology
      • Faculty of Theology
      • Faculty of Oriental Studies
      • Faculty of European Languages and Communication
      • Faculty of Journalism
      • Faculty of Informatics and Applied Mathematics
      • Faculty of Law
      • Faculty of Biology
      • Faculty of Armenian Philology
      • Faculty of International Relations
      • Faculty of History
      • Institute of Physics
      • Faculty of Russian Philology
      • Faculty of Sociology
      • Faculty of Economics and Management
      • Faculty of Philosophy and Psychology
      • Faculty of Chemistry
      • Faculty of Mathematics and Mechanics
      • Pedagogy and Education Development Center
      • Center for European Studies
      • Institute of Pharmacy
      • Information Technologies Educational and Research Center
      • Chair of Civil Defense
      • Chair of Physical Education and Sports
    • Column Wrapper
      • YSU STEM High School
      • YSU Ijevan Branch
    • Scientific Centers and Laboratories
      • American Studies Center
      • Center for Mathematical and Applied Research
      • Institute for Armenian Studies
      • Institute for Social and Humanitarian Studies
      • Research Center for Chemistry
      • Research Institute of Biology
      • Research Institute of Physics
      • Research Center for the Institute of Pharmacy
    • Scientific and Educational Centers
      • Observatory
      • Scientific and Educational Center for Control and Monitoring of the Quality of Medicines
      • Specialized cabinet-laboratory for the Design of Very Large Integrated Circuits (Synopsis)
      • Legal Clinic
      • Center for Applied Psychology
      • Research Center-Library of Greek Studies
      • Innovation Center for Microbial Biotechnology and Biofuels
      • Russian Center
      • Center for Russian Studies
      • Distance Learning Laboratory of Sociology
    • Column Wrapper
      • Banner
    • Administrative Divisions of YSU
      • Academic Secretary
      • Center for Doctoral Education
      • General Division
      • YSU History Museum
      • Department of Energy System Operation
      • Financial Analysis Department
      • Human Resources Department
      • Center for Admissions and Affairs with Applicants
      • Vehicle Fleet
      • Business Incubator
      • Byurakan Industrial Practice Base
      • Medical Center
      • Science Policy Department
      • Procurement Planning Department
      • Dilijan Sports and Health Center
      • YSU Archive
      • Publishing House
      • Legal Service
      • Marketing Department
      • International Cooperation Office
      • Tsaghkadzor training and production base
      • Cultural Center
      • Fire Safety Service
      • Alumni and Career Center
      • Hankavan Industrial Practice Base
      • Accounting Department
      • Center for Quality Assurance
      • Department for Special Affairs
      • Guest House
      • Student Dormitory
      • Educational-Methodological Department
      • Marie and Sarkis Izmirlian Library
      • Center for Strategic Planning
      • Rectorate
      • Rector's Office
      • Department of Territory Improvement and Landscape Design
      • Information Technology Department
      • Department of Organization and Control of Economic Activities
      • Student Affairs Center
  • Structure
  • Alumni and Career
    • Alumni Community
    • Career Center
    • Friends of YSU
  • Student life
    • YSU Student Scientific Society
    • YSU Student Council
    • Art and Culture
ՀայերենРусскийEnglish
envelope

Main Navigation (Eng)

  • Admission
    • Undergraduate admission
    • Master’s degree admission
    • Postgraduate admission
    • Foreign Students
    • Preparatory courses
    • Work Carried out with Applicants
    • YSU STEM High School
  • Education
    • Guide Book for First Year Students
    • Educational programs
    • Granting qualification of a pedagogue
    • Center for Academic Writing
    • Continuing education
    • Academic Calendar
  • Science
    • Open science
    • Conferences
    • Library
    • Grants
    • Publishing House
    • Doctoral Thesis Defence Councils
    • HRS4R
  • News and events
    • Events
    • Activities
    • News
    • Newsletter
    • Announcement
    • Photo gallery
    • Video gallery

Secondary Navigation (Eng)

  • About YSU
    • YSU Management
    • YSU Symbols
    • YSU International Cooperation
    • Quality assurance
    • YSU History Museum
    • Vacancies
    • FAQ
  • Structure
    • YSU Faculties and Educational Centers
      • Faculty of Geography and Geology
      • Faculty of Theology
      • Faculty of Oriental Studies
      • Faculty of European Languages and Communication
      • Faculty of Journalism
      • Faculty of Informatics and Applied Mathematics
      • Faculty of Law
      • Faculty of Biology
      • Faculty of Armenian Philology
      • Faculty of International Relations
      • Faculty of History
      • Institute of Physics
      • Faculty of Russian Philology
      • Faculty of Sociology
      • Faculty of Economics and Management
      • Faculty of Philosophy and Psychology
      • Faculty of Chemistry
      • Faculty of Mathematics and Mechanics
      • Pedagogy and Education Development Center
      • Center for European Studies
      • Institute of Pharmacy
      • Information Technologies Educational and Research Center
      • Chair of Civil Defense
      • Chair of Physical Education and Sports
    • Column Wrapper
      • YSU STEM High School
      • YSU Ijevan Branch
    • Scientific Centers and Laboratories
      • American Studies Center
      • Center for Mathematical and Applied Research
      • Institute for Armenian Studies
      • Institute for Social and Humanitarian Studies
      • Research Center for Chemistry
      • Research Institute of Biology
      • Research Institute of Physics
      • Research Center for the Institute of Pharmacy
    • Scientific and Educational Centers
      • Observatory
      • Scientific and Educational Center for Control and Monitoring of the Quality of Medicines
      • Specialized cabinet-laboratory for the Design of Very Large Integrated Circuits (Synopsis)
      • Legal Clinic
      • Center for Applied Psychology
      • Research Center-Library of Greek Studies
      • Innovation Center for Microbial Biotechnology and Biofuels
      • Russian Center
      • Center for Russian Studies
      • Distance Learning Laboratory of Sociology
    • Column Wrapper
      • Banner
    • Administrative Divisions of YSU
      • Academic Secretary
      • Center for Doctoral Education
      • General Division
      • YSU History Museum
      • Department of Energy System Operation
      • Financial Analysis Department
      • Human Resources Department
      • Center for Admissions and Affairs with Applicants
      • Vehicle Fleet
      • Business Incubator
      • Byurakan Industrial Practice Base
      • Medical Center
      • Science Policy Department
      • Procurement Planning Department
      • Dilijan Sports and Health Center
      • YSU Archive
      • Publishing House
      • Legal Service
      • Marketing Department
      • International Cooperation Office
      • Tsaghkadzor training and production base
      • Cultural Center
      • Fire Safety Service
      • Alumni and Career Center
      • Hankavan Industrial Practice Base
      • Accounting Department
      • Center for Quality Assurance
      • Department for Special Affairs
      • Guest House
      • Student Dormitory
      • Educational-Methodological Department
      • Marie and Sarkis Izmirlian Library
      • Center for Strategic Planning
      • Rectorate
      • Rector's Office
      • Department of Territory Improvement and Landscape Design
      • Information Technology Department
      • Department of Organization and Control of Economic Activities
      • Student Affairs Center
  • Structure
  • Alumni and Career
    • Alumni Community
    • Career Center
    • Friends of YSU
  • Student life
    • YSU Student Scientific Society
    • YSU Student Council
    • Art and Culture
  1. Main
  2. Employees
  3. Khachatur Aghavardovich Khachatryan
download PDF
khachatur.khachatryan@ysu.am
Khachatur
Aghavardovich
Khachatryan
Faculty of Mathematics and Mechanics
Chair of Theory of Functions and Differential Equations
Head of the chair, professor

Personal information

Date of birth
1982
Scientific interests
  • Differential Equations, Mathematical Physics,
  • Non-Linear Analysis,
  • Integral and Integro-Differential Equations with Hammerstein and Urysohn Type Operators,
  • Non-Linear Pseudo-Differential Equations,
  • Mathematical Modeling of the Geographical Spread of an Epidemic,
  • Parabolic Type Non-Linear Equations
Education
Institution
YSU
Faculty
Faculty of Mathematics
Date
1998 - 2004
Degree name
Masters
Scientific Rank/degree
Institution
Institute of Mathematics NAS Armenia
Date
2018
Degree name
Professor
Specialty
Physico-mathematical sciences
Institution
YSU
Date
2006
Degree name
Candidate
Specialty
Physico-mathematical sciences
Scientific Supervisor
N.B.Yengibaryan
Research Topic
Factorization methods for solving some class of integral and integrodifferential equations on the semiaxis
Institution
YSU
Date
2011
Degree name
Doctor
Specialty
Physico-mathematical sciences
Research Topic
Solvability issues of some nonlinear integral and integro-differential equations with non-compact operators in the critical case
Language skills
Հայերեն
Русский
English
Work experience
Institution
YSU
Period of time
2021 till now
Rank/degree
Head of Chair of Theory of Functions and Differential Equations
Institution
YSU
Period of time
2020 - 2021
Rank/degree
Head of Chair of Differential Equations
Institution
Russian-Armenian University
Period of time
2019 till now
Rank/degree
Professor
Institution
Institute of Mathematics of NAS RA
Period of time
2016 till now
Rank/degree
Leading Researcher
Institution
M. V. Lomonosov Moscow State University (Yerevan Branch)
Period of time
2015 - 2017
Rank/degree
Lecturer
Institution
Institute of Mathematics of NAS RA
Period of time
2011 - 2016
Rank/degree
Senior Researcher
Institution
Institute of Mathematics of NAS RA
Period of time
2006 - 2011
Rank/degree
Researcher
Institution
Institute of Mathematics of NAS RA
Period of time
2004 - 2006
Rank/degree
Junior Researcher
Participation in international conferences and seminars
25/08/2014 - 01/09/2014
Четвертая международная конференция “Математическая физика и ее приложения”
Samara State Technical University
Russian Federation (the)
28/09/2014 - 03/10/2014
Пятое Российско-Армянское Совещание по математической физике, комплексному анализу и смежным вопросам
Institute of Mathematics of NAS RA
Russian Federation (the)
11/09/2016 - 16/09/2016
VI Российско-Армянское совещание по математическому анализу, математической физике и аналитической механике
Don State Technical University
Russian Federation (the)
12/11/2018 - 16/11/2018
Internaional conference «Modern Mathematical Physics. Vladimirov-95»
Steklov Mathematical Institute
Russian Federation (the)
09/09/2018 - 15/09/2018
Международная конференция “VII Российско-Армянское Совещание по математической физике, комплексному анализу и смежным вопросам”
Institute of Mathematics of NAS RA
Armenia
26/11/2019 - 30/11/2019
Международная школа-семинар молодых ученых Моделирование и оптимизация сложных систем MOCS-2019
Lomonosov Moscow State University
Russian Federation (the)
25/09/2019 - 28/09/2019
All-Russian scientific and practical conference with international participation "Equation of Convolution Type in Science and Technology" ECTST-2019 dedicated to the 90th Anniversary of the birth of Yuri Iosifovich Chersky
V.I. Vernadsky Crimean Federal University
Russian Federation (the)
16/09/2019 - 21/09/2019
International conference "8th Russian-Armenian Workshop on Mathematical Physics, Complex Analysis and Related Topics"
Steklov Mathematical Institute
Russian Federation (the)
23/11/2020 - 27/11/2020
Международная конференция по математической физике памяти академика В. С. Владимирова
Steklov Mathematical Institute
Russian Federation (the)
03/07/2020 - 08/07/2020
The International Conference on Differential Equations and Dynamical Systems
Lomonosov Moscow State University
Russian Federation (the)
27/09/2021 - 30/09/2021
International Conference "Selected Topics in Mathematical Physics" Dedicated to 75-th Anniversary of I. V. Volovich
Steklov Mathematical Institute
Russian Federation (the)
19/09/2022 - 23/09/2022
International conference on mathematical analysis and differencial equations
Yerevan State University
Armenia
30/06/2022 - 05/07/2022
The International Conference on Differential Equations and Dynamical Systems 2022
Lomonosov Moscow State University
Russian Federation (the)
09/01/2023 - 14/01/2023
International Conference Dedicated to the 100th Anniversary of the Birthday of V. S. Vladimirov (Vladimirov-100)
Steklov Mathematical Institute
Russian Federation (the)
Membership
Institution
Member of the Scientific Council of the Faculty of Mathematics and Mechanics of Yerevan State University
Period of time
2020 till now
Institution
Member of the editorial board of the Journal of Contemporary Mathematical Analysis
Period of time
2016 till now
Institution
Deputy Chairman of Yerevan State University 050 Professional Council
Period of time
2016 till now
Institution
Member of the Union of Mathematicians of Armenia
Period of time
2006 till now
Institution
Member of the Scientific Council of the Institute of Mathematics of the National Academy of Sciences of the Republic of Armenia
Period of time
2016 till now
State awards and honorary titles
2014
Winner of the "Efficient Researcher" competition (Natural Sciences) (Top 100)
2013
1st-class prize of the RA NAS "Best scientific work of 2013" competition,
2013
Winner of the first prize after Sergey Mergelyan for young scientists (Mathematics and Informatics)
2021
Winner of the "Efficient Researcher" competition (Natural Sciences) (Top 100)
2020
Winner of the "Efficient Researcher" competition (Natural Sciences) (Top 100)
2018
Winner of the "Efficient Researcher" competition (Natural Sciences) (Top 100)
2016
Winner of the "Efficient Researcher" competition (Natural Sciences) (Top 100)
2019
Prize of the President of the Republic of Armenia

Publications

- Կատեգորիա -
Article
Асимптотическое поведение решения для одного класса нелинейных интегро-дифференциальных уравнений в задаче распределения дохода
Х. А. Хачатрян
А. С. Петросян
А. Х. Хачатрян
Труды института математики и механики УрО РАН (Trudy Instituta Matematiki i Mekhaniki UrO RAN)
2021
188–206
Article
On the Solvability of a Class of Nonlinear Urysohn Integral Equations on the Positive Half-line
Kh.A.Khachatryan
H.S.Petrosyan
ИЗВЕСТИЯ ИРКУТСКОГО ГОСУДАРСТВЕННОГО УНИВЕРСИТЕТА. Серия Математика (BULLETIN OF IRKUTSK STATE UNIVERSITY-SERIES MATHEMATICS)
2021
57-68
Article
Integral Equations on the Whole Line with Monotone Nonlinearity and Difference Kernel
Kh.A.Khachatryan
H.S.Petrosyan
Итоги науки и техники. Современная математика и ее приложения. Тематические обзоры (Journal of Mathematical Sciences)
2021
790-804
Article
On Solvability of a Class of Multidimensional Integral Equations in the Mathematical Theory of Geographic Distribution of an Epidemic
Kh.A.Khachatryan
H.S.Petrosyan
Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences)
2021
143-157
Article
On Bounded Solutions of a Class of Nonlinear Integral Equations in the Plane and the Urysohn Equation in a Quadrant of the Plane
Kh.A.Khachatryan
H.S.Petrosyan
Украйнский математичний журнал (Ukrainian Mathematical Journal)
2021
811-829
Article
SOLVABILITY OF TWO-DIMENSIONAL INTEGRAL EQUATIONS WITH MONOTONE NONLINEARITY
Kh.A.Khachatryan
A.Kh.Khachatryan
H.S.Petrosyan
Итоги науки и техники. Современная математика и ее приложения. Тематические обзоры (Journal of Mathematical Sciences)
2021
720-731
Article
On Positive Bounded Solutions of One Class of Nonlinear Integral Equations with the Hammerstein–Nemytskii Operator
Kh.A.Khachatryan
A.Kh.Khachatryan
H.S.Petrosyan
Дифференциальные уравнения (Differential Equations)
2021
768–779
Article
Alternating bounded solutions of a class of nonlinear two-dimensional convolution-type integral equations
Kh.A.Khachatryan
A.S.Petrosyan
Transactions of the Moscow Mathematical Society (Труды Московского математического общества)
2021
259-271
Article
О качественных свойствах решения одной нелинейной граничной задачи в динамической теории p-адических струн
Х. А. Хачатрян
А. С. Петросян
Вестник Санкт-Петербургского университета. Прикладная математика. Информатика. Процессы управления
2020
423–436
Article
О знакопеременных и ограниченных решениях одного класса интегральных уравнений на всей оси с монотонной нелинейностью
Х. А. Хачатрян
А. С. Петросян
Вестник Самарского государственного технического университета. Серия: Физико-математические науки
2020
644–662
Article
Единственность решения одной системы интегральных уравнений на полуоси с выпуклой нелинейностью
Х. А. Хачатрян
А. С. Петросян
Ц. Э. Терджян
Математические труды
2020
187–203
Article
Solvability of a Nonlinear Problem in Open-Closed p-Adic String Theory
Kh.A.Khachtryan
H.S.Petrosyan
Дифференциальные уравнения (Differential Equations)
2020
1371–1378
Conference
О системах нелинейных интегральных уравнений Гаммерштейновского типа на полупрямой
Хачатрян Х. А.
Conference
О некоторых интегральных уравнениях на всей прямой с вогнутой нелинейностью
Хачатрян Х. А.
Conference
Вопросы отсутствия или существования и единственности нетривиального решения для некоторых классов нелинейных интегральных уравнений типа свертки
Хачатрян Х. А.
Conference
О разрешимости одной системы нелинейных бесконечных алгебраических уравнений в пространстве ограниченных последовательностей
Хачатрян Х.А.
Аветисян М.О.
Conference
О построении и исследовании решений класса сингулярных интегральных уравнений с монотонными нелинейными компонентами на всей оси
Хачатрян Х. А.
Андриян С. М.
Conference
О разрешимости одного класса интегральных уравнений на положительной полупрямой с выпуклой нелинейностью
Хачатрян Х. А.
Акопян А. Р.

Pagination

  • « Սկիզբ First page
  • < Previous page
  • 1
  • 2
  • 3

Quick access

  • Intranet
  • E-learning
  • Mulberry
  • Online applications
  • Phone book
  • Registrar
  • Documentation

Footer(ENG)

  • Main pages
    • Admission
    • Education
    • Science
    • News
  • Information
    • Frequently asked Questions
    • Vacancies
    • Search for educational programs
    • For the applicants
    • For the students
  • About YSU
    • YSU management
    • YSU symbols
© Yerevan state university 2025
Address: Republic of Armenia, Yerevan, 0025, 1 Alex Manoogian (+37460) 710000 info@ysu.am