# Institute annual report 2018

(updated on January 6, 2024; June 28, 2023 with Peer Review, on March 15, 2022, with CNCSIS prizes on 2018)

(updated on January 6, 2024; June 28, 2023 with Peer Review, on March 15, 2022, with CNCSIS prizes on 2018)

The Numerical Analysis and Approximation Theory workgroup:

- Dr. Emil
**Cătinaş** - Prof. Dr. Ion
**Păvăloiu**(workgroup coordinator) - Prof. Dr. Octavian
**Agratini** - Dr. Diana
**Otrocol** - Dr. Flavius
**Pătrulescu** - Mihai
**Nechita** - Imre
**Boros** - Cristian-Daniel
**Alecsa**

The Numerical Modeling workgroup:

- Dr. Călin-Ioan
**Gheorghiu**(workgroup coordinator) - Dr. rer. nat. habil. Nicolae
**Suciu** - Dr. Maria
**Crăciun**

Dr. rer. nat. habil. Nicolae **Suciu** supervises PhD theses.

He has recently supervised the thesis *Filtered density functions for uncertainty assessment of transport in groundwater*, by Lennart Schüler, defended on September 8, 2016, at Jena University, Germany; the thesis received the distinction *Magna Cum Laudae*.

Prof. dr. Ion **Păvăloiu** has supervised 8 PhD theses at North University of Baia-Mare and at Babeş-Bolyai University.

Prof. dr. Octavian **Agratini**, who supervised PhD theses at Babes-Bolyai University.

theses supervised 2018:

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

Survey papers

- E. Cătinaş,
*A survey on the high convergence orders and computational convergence orders of sequences*, Appl. Math. Comput., 343 (2019) 1-20.

(rem.: paper published online in 2018, with coordinates in 2019; not counted in the present report)

Papers in JCR/ISI journals:

__M. Crăciun, C. Vamos, N. Suciu__,*Analysis and generation of groundwater, concentration time series*, Advances in Water Resources, vol. 111 (2018), 20-30, (impact factor**IF 3.512**) (online since 2017)__C.I. Gheorghiu__,*On the numerical treatment of the eigenparameter dependent boundary conditions*, Numer. Algor. 77 (2018) 1, 77–93 (online since 2017)- F. Pătrulescu,
*A regularization method for a viscoelastic contact problem*, Mathematics and Mechanics of Solids, vol. 23 (2018) no. 2, pp. 181-194, DOI: 10.1177/1081286516676869, (IF 2017/2018: 2.545 ). http://journals.sagepub.com/doi/abs/10.1177/1081286516676869 (online since 2017**)** - F. Pătrulescu,
*A mixed variational formulation of a contact problem with adhesion*, Applicable Analysis, vol. 97 (2018) no. 8, pp. 1246-1260, DOI: 10.1080/00036811.2016.1166213, (IF 2017/2018: 0.963). (online since 2016) - M. Sofonea, F. Pătrulescu, A. Ramadan,
*A mixed variational formulation of a contact problem with wear*, Acta Applicandae Mathematicae, vol. 153 (2018) no. 1, pp. 125-146, DOI: 10.1007/s10440-017-0123-4 (IF 2017/2018: 0.91). (online since 2017) - D. Alecsa,
*Some fixed point results regarding convex contractions of Presić type*, J. Fixed Point Theory Appl., 20 (2018), art. 7. DOI : 10.1007/s11784-018-0488-7 - D. Otrocol, M.-A. Serban,
*An efficient step method for a system of differential equations with delay*, Journal of Applied Analysis and Computation, vol 8 (2018) no 2, 498-508, DOI: 10.11948/2018.498 (IF: 1.063) - I. Păvăloiu,
*On an Aitken-Steffensen-Newton type method*, Carpathian J. Math., 34 (2018) no. 1, 85-92. - B.C. Dhage, D. Otrocol,
*Dhage iteration method for approximating solutions of nonlinear differential equations with maxima*, Fixed Point Theory, 19 (2018), no. 2, 545-556, DOI: 10.24193/fpt-ro.2018.2.43 (IF:0.548) - V. Ilea, D. Otrocol,
*Some properties of solutions to a planar system of nonlinear differential equations*, Stud. Univ. Babes-Bolyai Math. 63 (2018), no. 2, 225-234, DOI: 10.24193/subbmath.2018.2.06

- D. Alecsa,
*Some fixed point results linked to alpha-beta rational contractions and modified multivalued Hardy-Rogers operators*, Journal of Fixed Point Theory 2018 (Article ID 3), 1-22, ISSN: 2052-5338 - D. Otrocol and V. Ilea,
*On the qualitative properties of functional integral equations with abstract Volterra operators*, Res. Fixed Point Theory Appl., Volume 2018, 2018, Article ID 201813, 08 pages

Accepted papers published online in JCR (ISI) papers

- D. Alecsa,
*Approximating fixed points for nonlinear generalized mappings using Ishikawa iteration*, Rendiconti del Circolo Matematico di Palermo Series 2, (2018) 1-29, DOI: 10.1007/s12215-018-0349-7 - E. Burman, M. Nechita, L. Oksanen,
*Unique continuation for the Helmholtz equation using stabilized finite element methods*, Journal de Mathématiques Pures et Appliquées, DOI 10.1016/j.matpur.2018.10.003 (published online in 2018; vol, issue, pp. not yet available)

- M. Nechita (2018),
*Sir George Jessel studentship*, UCL; - M. Nechita (2018),
*Andrew Rosen prize for applied mathematics*, UCL.

CNCSIS prizes for papers published in the “red zone” journals (based on journals impact factor or influence score):

- C.I. Gheorghiu, code PRECISI-2018-26054
- O. Agratini,code PRECISI2018-24635
- C.D. Alecsa, code PRECISI-2018-26769
- F. Pătrulescu, code PRECISI2018-24096

CNCSIS prizes for papers published in the “yellow zone” journals:

- M. Crăciun, N. Suciu, C. Vamos, code PRECISI-2018-22524
- O. Agratini, code PRECISI-2018-28627
- D. Otrocol, code PRECISI2018-23696

- International Conference on Numerical Analysis and Approximation Theory (NAAT 2018), Cluj-Napoca, September 6-9, 2018. (ICTP is coorganizer)
- In memoriam dr. Călin Vamoş (1955-2017), mathematician and physicist, outstanding member of the Tiberiu Popoviciu Institute of Numerical Analysis, Cluj-Napoca, October 29, 2018.

International conferences:

- C.I. Gheorghiu,
*Spectral Collocation Solutions to a Class of Pseudo-Parabolic Equations*, The 9 th International Conference Numerical Methods and Applications’ (http://nma18.fmi.uni-sofia.bg/) organizatǎ de Faculty of Mathematics and Informatics, Sofia University “St. Kliment Ohridski”, 20-24 august 2018. - N. Suciu,
*Heuristic introduction to numerical methods for diffusion processes*, International Conference on Numerical Analysis and Approximation Theory (NAAT 2018), Cluj-Napoca, September 6-9, 2018 - A. Viorel, C.D. Alecsa,
*Optimization Algorithms based on Operator Splitting and Energy-Preserving Numerical Integrators*, International Conference on Numerical Analysis and Approximation Theory (NAAT 2018), Cluj-Napoca, September 6-9, 2018 - I. Păvăloiu, E. Cătinaş,
*On a newton-hermite-steffensen type method*, International Conference on Numerical Analysis and Approximation Theory (NAAT 2018), Cluj-Napoca, September 6-9, 2018 - A. Pop, M. Crăciun, C. Vamoş,
*Deciphering the orbital period variability of U CrB using differential diagnosis*, Outlook in Astronomy, Astrophysics, Space and Planetary Sciences, International Conference 17-19 May 2018, Cluj Academic Days 2018 (Astronomical Observatory) - M. Crăciun, T. Harko,
*A Bose-Einstein Condensate dark matter model tested with the SPARC galactic rotation curves data*, Fourth International Conference on Numerical Analysis and Approximation Theory, 6-9 September 2018, Cluj-Napoca - C.I. Gheorghiu,
*Spectral Collocation Solutions to a Class of Nonlinear BVPs on the Half Line*, NAAT Cluj-Napoca, Septembrie 6-9, 2018 - C.I. Gheorghiu
*, Spectral Collocation Solutions to Eigenproblems on Unbounded Domains*, CAIM 26 th Conference, organizata de ROMAI www.romai.ro si Universitatea Tehnica din Moldova, Chişinǎu, 20-23 septembrie 2018 - F. Pătrulescu,
*Analysis of a rate-and-state friction problem with viscoelastic materials*, Emerging Trends in Applied Mathematics and Mechanics 2018, Krakow, June 18 – 22, 2018, https://sites.google.com/view/etamm2/home - D. Otrocol,
*Ulam stability of a linear difference equation in topological vector spaces,*Conference on Ulam’s type stability, October 8-13, 2018, Timișoara, Romania - C.I. Gheorghiu,
*146th ESGI/Co-creation Event with Society-study group*, University of Cyprus (The 2nd Study Group with Industry in Cyprus), December 3-7, 2018.

National conferences:** **

- N. Suciu,
*Călin Vamoş – Metoda cinematică de modelare continuă a sistemelor fizice discrete*, In memoriam dr. Călin Vamoş (1955-2017), mathematician and physicist, outstanding member of the Tiberiu Popoviciu Institute of Numerical Analysis, Cluj-Napoca, October 29, 2018. - E. Cătinaş,
*Călin Vamoş, an outstanding member of the Institute*, In memoriam dr. Călin Vamoş (1955-2017), mathematician and physicist, outstanding member of the Tiberiu Popoviciu Institute of Numerical Analysis, Cluj-Napoca, October 29, 2018. - I. Păvăloiu,
*The researcher Călin Vamoş, a model for all researchers*, In memoriam dr. Călin Vamoş (1955-2017), mathematician and physicist, outstanding member of the Tiberiu Popoviciu Institute of Numerical Analysis, Cluj-Napoca, October 29, 2018. - M. Crăciun,
*Călin Vamoş – contributions to time series analysis*, In memoriam dr. Călin Vamoş (1955-2017), mathematician and physicist, outstanding member of the Tiberiu Popoviciu Institute of Numerical Analysis, Cluj-Napoca, October 29, 2018. - I. Boros,
*Accurate spectral method solutions for flow in heterogeneous aquifers*, Conferinţa Naţională a Doctoranzilor, Universitatea de Vest Timişoara, 3-4 iulie 2018.

- International grant SU 415/4-1 (https://gepris.dfg.de/gepris/projekt/405338726) obtained by dr. rer. habil. N. Suciu from (Deutschefourschungs Gmemeindschaft), for the project
*“Integrated global random walk model for reactive transport in groundwater adapted to measurement spatio-temporal scales”*(01.10.2018-30.09.2021), in progress at Erlangen-Nuernberg University.

- Studia UBB Math. (JCR/ISI): O. Agratini
- J. Numer. Anal. Approx. Theory: O. Agratini (Editor-in-Chief), E. Catinas (Editor-in-Chief), D. Otrocol, M. Nechita, I. Boros
- ROMAI Journal: N. Suciu, C.I. Gheorghiu
- Mathematica (Cluj): O. Agratini
- Open Journal of Discrete Mathematics: O. Agratini
- J. Science and Arts: O. Agratini

(to be completed)

- O. Agratini: Journal of Numerical Analysis and Approximation Theory (2), Analysis and Mathematical Physics (2), Mathematica, Cluj (1), Results in Mathematics (1), Carpathian Journal of Mathematics (1), Filomat (1), Journal of Mathematical Inequalities (1), Publications de l’Institut Mathématique, Belgrad (1), Annals of Functional Analysis (1)
- (to be completed)

for Mathematical Reviews:

- O. Agratini: MR3857066, MR3849660, MR3814579, MR3767953, MR3746511, MR3711913
- C. Mustăța: MR3914385, MR3871517, MR3837358, MR3757898
- D. Otrocol: MR3891949, MR3796005

for ZBL:

- C.I. Gheorghiu: 1447.65177, 1451.65214, 1447.35145, 1402.65158, 1402.65148, 1397.65249, 1397.65286, 1397.65266, 1397.65265, 1394.65138, 1397.65277, 1398.65340, 1395.65134, 1450.65143, 1395.65144, 1404.65291, 1397.65254, 1453.65400, 1390.65046, 1382.65409, 1436.65003.
- N. Suciu: ?

Book reviews:

- (to be completed)