2021
2022
2023

Institute annual report 2022

updates: January 6, 2024; November 28, 2023. Main version: February 16, 2023.

Human resources

The Numerical Analysis and Approximation Theory workgroup:

The Numerical Modeling workgroup:

Doctoral students/postdocs:

Doctoral students in 2022:

  • Imre Boros, Numerical methods for partial differential equations, at UBB Cluj
  • Eduard Grigoriciuc, at UBB Cluj
  • Andra Malina, Metode de aproximare a functiilor de mai multe variabile, at UBB Cluj
  • Andrei Stan, Nash type equilibria for systems of nonlinear equations, at UBB Cluj

Postdoc students in 2022:

PhD advisors

Prof. dr. Radu Precup, corresponding member of the Romanian Academy
PhD students (2022):

  • Andrei Stan, Nash type equilibria for systems of nonlinear equations
  • Alexandru Hofman, Control problems for systems of Kolmogorov type
  • Alexandru Orzan, Parametric methods for problems of fractional optimization
  • David Brumar, The analysis of some mathematical models in fluid dynamics

Coordination of doc and postdoc students (2022): Nataliia Kolun (Ukraine), Sylvain Koumla (Chad, 2 months).
Mentor in some research projects: Lorand Parajdi, Nataliia Kolun.

Prof. Univ. dr. Octavian Agratini
PhD students (2022):

  • Grapini O. Silviu-Ilie,
  • Balogh M. Anamaria,
  • Bunea-Domșa S. Mihai Grigore,
  • Boros Imre, Numerical methods for partial differential equations.

Dr. rer. nat. habil. Nicolae Suciu
(no PhD students in 2022)

Prof. Univ. dr. Ion Păvăloiu (honorary member of ICTP)
(no PhD students in 2022)

Papers published in 2022

Papers in JCR journals from abroad

Papers in JCR journals from Romania

Papers published in other journals

Preprints in Arxiv

Prizes, outstanding achievements

  • M. Nechita, Medalia “Distincţia Culturală” (the “Cultural Distinction” Medal), from Romanian Academy Cluj-Napoca Branch, for outstanding results in Finite Element method

Prof. Dr. R. Precup has H-index 15: https://www.webofscience.com/wos/author/rid/B-8158-2011

Dr. rer. nat. habil. N. Suciu has H-index 13: https://www.webofscience.com/wos/author/rid/N-7971-2017

Prof. Dr. O. Agratini has H-index 10: https://www.webofscience.com/wos/author/rid/B-6607-2012

Editorial activity

JCR/ISI journals abroad

JCR/ISI journals from Romania

Journals of the Romanian Academy

  • J. Numer. Anal. Approx. Theory: O. Agratini (Editor-in-Chief), E. Cătinaş (Editor-in-Chief), I. Păvăloiu (deputy Editor-in-Chief), M. Nechita, A. Malina, A. Stan
  • Mathematica (Cluj): R. Precup, O. Agratini (Members of the Editorial Board);

Other journals from abroad

Other journals from Romania

Conferences

Conferences organized by the Institute

Institute members in the scientific committees of international conferences

Institute members in organizing committees of international conferences

  • O. Agratini, co-organizer of special session S10 (Positive approximation processes and applications) of the conference International Conference on Functional Analysis, Approximation Theory and Numerical Analysis, Matera, Italy, July 5-8, 2022, FAATNA20>22 – Sessions (unibas.it)

Invited speakers:

International conferences

  • R. Precup, Semilinear problems with poly-Laplace type operators. XVème Colloque Franco-Roumain de Mathématiques Appliquées Toulouse, 29 août – 2 septembre 2022, Universite Paul Sabatier de Toulouse, Toulouse, Franta, 2022, 29 august -2 septembrie https://15colfrro.sciencesconf.org/
  • R. Precup, Stationary Kirchhoff equations and systems with reaction terms. Research Seminar in Differential Equations, University of Lodz, Poland,Lodz University of Technology, Lodz, Polonia, 2022, 22 martie 2022; the seminar is lead by Prof. Wojciech Kryszewki and Prof. Marek Galewski https://tulodz-my.sharepoint.com/:w:/g/personal/w7i73_adm_p_lodz_pl/EQ6ivqrzok9GuIw-EXK3ClcBtaUlyI138c1OPcPMKfOWKA?rtime=oSSCzOfV2kg
  • R. Precup, Nonlinear alternatives of hybrid type for nonself vector-valued maps and application to differential systems, Recent Developments in Ordinary and Partial Differential Equations, Bejaia University, Algeria, 2022, 22-26 mai 2022. https://rdopde22.sciencesconf.org
  • R. Precup, An algorithm of solving general control problems with application to a medical model, Paris, France, 2022, 26-28 oct 2022
  • R. Precup, Analysis of Navier-Stokes models for flows in bidisperse porous media. Workshop: Geometric Function Theory in Several Complex Variables and Complex Banach Spaces, “Babes Bolyai” University, Cluj-Napoca, Romania, 2022, 1-3 decembrie 2022.

National conferences

Talks given/conferences attended by the members of the Institute

International conferences

  • R. Precup, An algorithm of solving general control problems with application to a medical model, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • R. Precup, Analysis of Navier-Stokes models for flows in bidisperse porous media, Workshop: Geometric Function Theory in Several Complex Variables and Complex Banach Spaces, December 1-3, 2022, Cluj-Napoca (online) http://math.ubbcluj.ro/workshop_gk/
  • E. Cătinaş, On the convergence orders, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • N. Suciu, F.A. Radu, I.S. Pop, Space-time upscaling of reactive transport in porous media, InterPore2022 Online Conference, June 2022, https://events.interpore.org/event/40/contributions/4514/
  • N. Suciu, F.A. Radu, I.S. Pop, Random walk solutions of reactive transport in porous media adapted to measurement scales, XXIV International Conference on Computational Methods in Water Resources (CMWR), Gdańsk University of Technology, June 19-23, http://dx.doi.org/10.13140/RG.2.2.27364.24963
  • N. Suciu, Three issues of numerical modeling of reactive transport in porous media, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • D. Otrocol, Applications of fibre contraction principle to some classes of equations, Functional Analysis, Approximation Theory and Numerical Analysis, Matera, Italy, July 5-8 2022, FAATNA20>22.
  • D. Otrocol, Applications of fibre contraction principle to some classes of functional integral equations, Functional Analysis, International Conference on Approximation Theory and Its Applications, September 12-14, 2022, ICATA2022.
  • D. Otrocol, Applications of fibre contraction principle to some classes of equations, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • M. Nechita, Full fluid-structure state estimation from 4d-flow MRI data, 11th European Solid Mechanics Conference, Galway, Irlanda, 07.2022. https://www.esmc2022.org/
  • M. Nechita, Unique continuation for convection-diffusion equations using stabilised finite elements, 15th French-Romanian Colloquium on Applied Mathematics, Toulouse, 09.2022, https://15colfrro.sciencesconf.org
  • M. Nechita, Unique continuation for convection-diffusion equations using stabilised finite elements, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • C.I. Gheorghiu, On Chebyshev collocation solutions to the Liouville-Bratu-Gelfand problems, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • M. Crăciun, T. Harko, The effects of a random potential on Bose-Einstein Condensate dark matter halos, Theory, Observations and Data Processing in Astronomy, Astrophysics, Space and Planetary Sciences, 06-08 July 2022 Cluj-Napoca, 2022
  • A. Pop, V. Turcu, M. Crăciun,“Digging in the garbage” or SZ Lyncis – a quadruple stellar system? Theory, Observations and Data Processing in Astronomy, Astrophysics, Space and Planetary Sciences, 06-08 July 2022 Cluj-Napoca, 2022
  • M. Crăciun, A. Pop, On the analysis and modelling of some time series from astronomy, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • I. Boros, On the mathemathics of Neural Networks, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • O. Agratini, On Jain operators and their generalizations, The 9th International Congress on Fundamental and Applied Sciences, ICFAS 2022, Istanbul, Turkey, June 27-30, 2022. https://icfas2022.intsa.org/index.html
  • O. Agratini, On Wachnicki operators, International Conference on Functional Analysis, Approximation Theory and Numerical Analysis, Matera, Italy, July 5-8, 2022. http://web.unibas.it/faatna22/index.html
  • O. Agratini, Uniform approximation by certain linear approximation processes, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • A. Stan, Existence and localization of Nash equilibria for systems with partial variational structure, XVème Colloque Franco-Roumain de Mathématiques Appliquées, 29 august-2 septembrie 2022, Toulouse, Franța, https://15colfrro.sciencesconf.org/
  • A. Stan, On approximating the convergence orders, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/
  • A. Stan, On the existence of Nash equilibria for nonvariational systems, 14th Joint Conference on Mathematics and Computer Science Cluj-Napoca, 24–27 Noiembrie 2022, https://www.cs.ubbcluj.ro/~macs/2022/index.php?m=2
  • E.S. Grigoriciuc, On some convex combinations of analytical functions, Numerical Analysis, Numerical Modeling and Approximation Theory (NA-NM-AT 2022), 26–28 October 2022 (online) https://ictp.acad.ro/nanmat-2022/

National conferences

  • R. Precup, On some applications of the controllability principle for fixed point equations, Seminar on Nonlinear Operators and Differential Equations, February 24, 2022, Cluj-Napoca, http://www.math.ubbcluj.ro/~nodeacj/soned.html
  • A. Stan, Kirchhoff type equations and system of equations, Program of the Seminar on Nonlinear Operators and Differential Equations, 31 martie 2022, UBB Cluj, http://www.math.ubbcluj.ro/~nodeacj/soned.html
  • A. Stan, Localization of Nash-type Equilibria for Systems with a Partial Variational Structure,  Fourth Romanian Itinerant Seminar on Mathematical Analysis and its Applications RISMAA, Brașov, May 19-21, 2022, https://mateinfo.unitbv.ro/ro/136-conferin%C8%9Be-category/507-rismaa-about
  • E.S. Grigoriciuc, Starlike and convex functions in C: examples via MatLab, International Students’ Conference StudMath-IT, Facultatea de Stiinte Exacte, Universitatea “Aurel Vlaicu” Arad, Romania, 23 – 24 November 2022; https://studmathit.uav.ro/
  • E.S. Grigoriciuc, The Graham-Kohr extension operator and subclasses of biholomorphic mappings in Cn, The 14th Joint Conference on Mathematics and Computer Science (14th MaCS), Facultatea de Matematica si Informatica, Universitatea “Babes-Bolyai” Cluj-Napoca, Romania, 24 – 27 November 2022; https://www.cs.ubbcluj.ro/~macs/2022/
  • E.S. Grigoriciuc, The Graham-Kohr extension operator and subclasses of biholomorphic mappings in Cn, Workshop dedicated to the memory of Professor Gabriela Kohr: Geometric Function Theory in Several Complex Variables and Complex Banach Spaces, Facultatea de Matematica si Informatica, Universitatea “Babes-Bolyai” Cluj-Napoca, Romania, 1 – 3 December 2022; http://math.ubbcluj.ro/workshop_gk/

Presentations at seminars/workshops

  • E.S. Grigoriciuc, Convex sums of univalent functions: examples using MatLab, Seminarul grupului de cercetare de Analiza Complexa “Prof. dr. Gabriela Kohr”, Facultatea de Matematica si Informatica, Departamentul de Matematica, Universitatea “Babes-Bolyai” Cluj-Napoca, Romania, 13 October 2022; http://math.ubbcluj.ro/~gctf/
  • E.S. Grigoriciuc, Eigenvalues and Eigenvectors: general properties and applications, Seminar ICTP, 9 November 2022;
  • E.S. Grigoriciuc, Matrix exponentials. Pseudospectra of matrices, Seminar ICTP, 14 Decembrie 2022;
  • A. Malina, -eigenvalues-, Seminar ICTP, November 9, 2022
  • I. Buda, -eigenvalues-, Seminar ICTP, November 9, 2022
  • A. Stan, -eigenvalues-, Seminar ICTP, November 9, 2022

International scientific collaborations

National scientific collaborations

  • O. Agratini, collaboration with Ivan Mircea, Technical University Cluj-Napoca
  • M. Craciun, collaboration with Tiberiu Harko, from Univ. Babes-Bolyai (‪Tiberiu Harko‬ – ‪Google Academic‬)
  • M. Craciun, collaboration with Alexandru Pop, Astronomical Institute, Astronomical Observatory Cluj-Napoca, Romanian Academy, (‪Alexandru Viorel Pop‬ – ‪Google Academic‬)
  • A. Malina, collaboration with Teodora Catinas, from the Babes-Bolyai University, Cluj-Napoca
  • E. Grigoriciuc, collaboration with Mirela Kohr, from the Babes-Bolyai University, Cluj-Napoca

Grants/scholarships

  • Radu Precup – Granturi de sustinere a competitivitatii, Universitatea Babeş-Bolyai:
    1.    AGC33151/28.06.2022
    2.    AGC33152/28.06.2022
    3.    AGC33153/28.06.2022
  • M. Nechita, postdoc scholarship at INRIA, Paris (ended in March? 2022)
  • M. Nechita, postdoc scholarship at “Babes-Bolyai” University (started in september/october 2022) POCU/993/6/13/153310 „Dezvoltarea competențelor de cercetare avansată şi aplicată în logica STEAM + Health”, https://sites.euro.ubbcluj.ro/steam/

Prizes, outstanding achievements

  • N. Suciu has received the CNCSIS prize PN-IV-P2-2.3-PRECISI-2023-72840, for publishing a paper in the “red zone”

Membership in professional organizations

  • E. Cătinaş, SIAM member
  • ??, (to be completed)

Peer review

Members of international committees

  • N. Suciu, expert evaluator for Swedish Research Council

Members of national committees

Members of PhD evaluation committees

  • O. Agratini, for thesis Clase de operatori neliniari pentru probleme de punct fix cu aplicații, by Ciobănescu Cristian (coord. Postolache Mihai), Universitatea Politehnică București, defended on June 23, 2022.
  • O. Agratini, for thesis Contribuții la aproximarea prin operatori liniari și pozitivi, by Smuc Mihaela (coord. Păltănea Radu and Heiner Gonska), Universitatea Transilvania din Brașov, defended on September 27, 2022.
  • O. Agratini, for Lőrinczi Ábel (coord. Mărcuș Andrei), Babes-Bolyai University, defended on September 28, 2022.
  • R. Precup, for Manu Andra-Monica (coord. Mirela Kohr), Babes-Bolyai University, defended on September 16, 2022
  • E. Cătinaș, for thesis Metode numerice iterative pentru ecuatii diferentiale si integrale de ordin fractionar, by L. Satmari (coord. A. Bica), University of Oradea, defended on October 25, 2022.

Members of PhD supervising committees

  • R. Precup for thesis of Cristina Gheorghe (supervisor: A. Petrusel);
  • R. Precup for thesis of Florin Albisoru (supervisor: M. Kohr)
  • R. Precup for thesis of I. Papuc (supervisor: M. Kohr)
  • R. Precup for thesis of by M. Aron (supervisor: M. Kohr)
  • R. Precup for thesis of A. Gasparovici (supervisor: M. Kohr),
  • R. Precup for thesis Metode de aproximare a functiilor de mai multe variabile, by Andra Malina (supervisor: T. Catinas)
  • O. Agratini for thesis of Alin Fodor (supervisor C. Pintea);
  • O. Agratini, for Șuțu Mădălina (supervisor T. Cătinaș)
  • O. Agratini for thesis Metode de aproximare a functiilor de mai multe variabile, by Andra Malina (supervisor: T. Cătinaș)

Referee reports for peer reviewed journals:

  • R. Precup: 13
  • C.I. Gheorghiu: 12
  • N. Suciu: 3
  • E. Catinas – 2: for Numer. Algor. (1) and Carpathian J. Math. (1)
  • O. Agratini – 5: for Studia Universitatis Babeș-Bolyai Mathematica (3), Journal of Numerical Analysis and Approximation Theory (2)

Book reviews:

Reviews

for the two major international databases.

For Mathematical Reviews:

For ZBL Math:

2021
2022
2023