Staff profile

Dr Ovidiu Bagdasar

Associate Professor in Mathematics

A head shot of Ovidiu Bagdasar




College of Science and Engineering


School of Computing and Engineering, University of Derby Online Learning

Research centre

Data Science Research Centre




Markeaton Street, Derby Campus



I am Associate Professor in Mathematics. This means that most of my time is spent between research, teaching, and helping everyone enjoy maths. In collaboration with colleagues, students and technology partners, I develop and deploy numeracy training support to students and staff in our university, companies, and the general public.  

I am a firm believer of internationalization in Higher Education and I coordinate the Turing and Erasmus+ schemes for Mathematics, Computing and Engineering. 

I hold BSc (2006), MSc (2007) Mathematics from UBB Cluj (Romania), PhD in Applied Mathematics in 2011 (EST Marie Curie Fellow, University of Nottingham) and PhD in Pure Mathematics in 2015 (UBB Cluj). I joined the University of Derby (UoD) in 2012 as a Lecturer in Mathematics, becoming Associate Professor in 2019. In the same year I have become Fellow of the Institute of Mathematics and its Applications (FIMA), and Senior Fellow of the Higher Education Academy (SFHEA) in 2020. 

I am a member of the London Mathematical Society (2020-), International Society for Difference Equations (2017-), American Mathematical Society (2014-), Romanian Mathematical Society (2013-) and the Marie Curie Alumni Network (2011-). I am also active member in the Research Centre in Data Science at the University of Derby.

Motto: "The purpose of education is to replace an empty mind with an open one." (M. Forbes)

Teaching responsibilities

My teaching is informed by research and is focused around number theory, simulations, optimization, computational, discrete and industrial mathematics, and also mathematical education, with a focus on maths anxiety. I have been responsible for teaching some UG and PG modules: 

  • Mathematical Software (Level 4- Mathematics)
  • Computational Mathematics (Level 4 – Computer Science) 
  • Calculus (Level 4, Mathematics)
  • Optimisation Techniques (Level 6, Mathematics)
  • Modelling with Differential Equations (Level 6 - Mathematics)
  • Optimization (Level 7, MSc Computational Mathematics)

With Vretta Inc, in 2020 I developed and deployed online exams which are automatically generated, graded (with moderation), and profile full solutions and feedback.
The practice has been praised by externals and adopted by colleagues. These innovations have been presented at high-profile external events or in student blogs.

Advance HE Learning and Teaching 2021:
Centre for Excellence blog:

Professional interests

Academic interests:

  • Research in computational mathematics 
  • Communicate mathematics to a wider audience 
  • Use research to transform the student experience
  • Inspire students to engage and improve their performance 
  • Use emerging technologies to transform learning, teaching and assessment
  • Develop national and international partnerships for research and student mobility (e.g. Erasmus+)
  • Generate results with significant theoretical and applicable implications
  • Develop a research team to work on Recurrences and Optimization

Key projects 

  • 2020- Criminal Networks analysis through mathematical modelling and data science 
  • 2020- MathsHub –maths support for University of Derby students, staff, and outreach 
  • 2019- Maple ambassador (Maths Software for symbolic calculations and Engineering simulations) 
  • 2018- Numeracy skills training for all Derby students and staff, with Vretta Inc. 
     Developed 12 training courses used by 2000+ students at University of Derby, partners, and SMEs.
     As of Jan 2022, 500+ digital badges have been awarded   
  • 2018- Mobius (Mathematical Software –deployed at UoD for developing E-Assessment in Maths) (£40k)
  • 2017- IPEC Alba Iulia (Ceramics coloring project) Computational Models for the reproduction of ceramic colors 
  • 2017- UPN (Logistics, Maths Group Proect at UoD)
  • 2015- Mathematical Anxiety (multiple projects in Romania, Turkey, etc)
  • 2014- Bosch Thermotechnology (VSM - Value Stream Mapping)

Research interests

My research interests include number theory, optimization, computational, discrete and industrial mathematics, but also mathematical education, with a focus on maths anxiety.

Much of my work is published in leading journals like Neural NetworksJournal of Global OptimizationCarpathian J Math, Mathematics and Computers in Simulation and Asian Journal of Control. I have authored work with more than 50 collaborators from UK, India, Romania, Thailand, Spain, China, Australia, or Kuwait.

Some of my UG students have produced original research, disseminated through International Symposiums, Mathematical Magazines, or journal papers. 

  • Four of my students have been awarded URSS bursaries to undertake research stages in Romania (Eve H. - Recurrent sequences 2016, Manzal and Chandni M. - Ceramics modelling2018) and Kenya (Navraj G - Sustainable agriculture 2018)
  • Eve Hedderwick co-authored a journal paper in ENDM (Elsevier, 2018)

Contributions to the Online Encyclopedia of Integer Sequences: 

Membership of professional bodies


  • eAA - e-Assessment Association (2021-)
  • HEA - Higher Education Academy (SFHEA 2020-, FHEA 2013-2020)
  • LMS - London Mathematical Society (2020-)
  • EMS - Euroopean Mathematical Society (2019-)
  • IMA  - Institute of Mathematics and its Applications (Fellow 2019-, Member 2012-19)
  • INFORMS (2018-2020)
  • ISDE - International Society of Difference Equations (2017-)
  • AMS - American Mathematical Society - Member (2014-)
  • SSMR - Romanian Mathematical Society (2013-)


  • Reviewer for Mathematical Reviews
  • Reviewer for the Journal of Number Theory
  • Reviewer for the Journal of Integer Sequences 
  • Reviewer for the Punjab Journal of Mathematics
  • Editor for the Octogon Mathematical Magazine, Romania
  • Member of the Smart Systems Research Group at the University of Derby
  • External collaborator of the Analysis and Optimization Research Group, UBB Cluj, Romania
  • External collaborator of NCAO, KMUTT Thailand 
  • External collaborator of the Ramanujan Centre for Higher Mathematics, Alagappa University, India 


  • 2002-2006: BSc Hons (1st), Mathematics, UBB, Cluj, RO (9.97/10)
  • July 2006-present: Qualified Mathematics Teacher (QTS) all levels
  • 2006-2007: MSc (distinction), Real and Complex Analysis (10/10)
  • 2007-2010: EST Marie Curie Fellow, University of Nottingham, UK
  • 2007-2011: PhD, Applied Mathematics, University of Nottingham, UK
  • 2007-2015: PhD, Pure Mathematics, Babes-Bolyai University, Cluj Napoca, RO
  • 2012-2013: PG Cert HE, University of Derby
  • 2012-2016: BA, Pastoral Orthodox Theology, UAB, Alba Iulia, RO
  • 2012: Postgraduate Research Supervision training 

Recent conferences

Invited lectures and seminars

  • 05 Jan 2022: American University of Kuwait - Mathematics Department (
    Invited Talk: On some special polynomials with applications to the study of partitions
  • 25 Oct 2021: The Ontario Colleges Mathematics Association 40th Annual Conference (
    Keynote Talk: Mathematics on the Edge: From the classroom to applications and infinity
  • 28 June 2021: iEducare, Malaysia. Talk: Problem Solving skills: A mathematical key to employability
  • 19 May 2021: Data Science Research Seminar (60 min), UoD, UK
    Talk: Mathematics, poetry in symbols and formulae: infinity, fractals and recurrences
  • 28 April 2021: ANSCSE’24, 24th International Annual Symposium on Computational Science and Engineering
    Kasetsart University, Nakhon Pathom, Thailand
    Invited Talk: Computational mathematics: from pseudoprimality to the structure of criminal networks
  • 21 January 2021: Mediterranean College, Greece
    Guest lecture: Computational Mathematics and Numeracy Training
  • 14 Nov 2020: International forum on Internet of things and Cloud/Edge Coordination (Anhui University, China)
    Invited Talk: Algorithms for a better life: Applied Mathematics on the Edge
  • 15 October 2020: Analysis and Optimization Research Seminar (60 min), UBB Cluj, Romania
    Talk: Recurrent Sequences (book presentation)
  • 26 September 2019: ISB Bucharest: Problem solving: Your key to securing a job
  • 22-24 January 2020: ICMMCMSE’2020 (Alagappa University, India)
  • 17-24 December 2019: UK-Jiangsu 2020 Workshop, Zhenjiang, Erasmus+ meeting in Ahnui University, Hefei (China)
  • 12-13 October 2019: GEBA’2019 (Iasi, Romania)
  • 11-14 Sept 2019: IWANA2019 Thailand (Invited speaker)
    Invited talk: From classical theory to new results for polynomials, partitions and integer sequences
  • 9 September 2019: Guest speaker at Rajamangala University, Bangkok, Thailand
    Mathematical education and problem solving in the era of Big Data”  
    Big Data: Theoretical background, impact in the real world and examples”
  • 6 September 2019:   NCOA’2019, Bangkok, Thailand
    Invited talk: Unifying local-global type properties in vector optimization
  • 3-4 September 2019: ICMMCI’2019,Alagappa University, India (Keynote Speaker)
  • 21 Jan 2019: CNAS College, Brasov, Romania: "Mathematics, poetry in symbols: Infinity, Fractals and Recurrences
  • 16 Jan 2019: HCC Alba Iulia College, Romania: "Mathematical incursions: Ideas, theory practice"  
  • 7 June 2018: UBB Cluj, Romania, Faculty of Mathematics: 1. Complex Analysis Research Seminar (30 min):  "On cyclotomic polynomial coefficients"; 2. Analysis and Optimization Research Seminar (60 min): “Traffic Assignment Problem: Methods and Simulations”
  • 15 March 2018: Edge Hill University (talk: Traffic Assignment Problem: On the interplay between Optimization and Equilibrium Problems)
  • 13 February 2018: International Schoool of Bucharest (talk: Problem Solving: The mathematical key to securing a job)
  • 23 May 2017: Optimum versus equilibrium solutions in traffic flow management, MOS UBB Cluj (Research centre for Modelling, Optimization and Simulation)
  • 12-13 October 2017: Kishinev State University, Moldova (Complex recurrent sequences: Techniques, Patterns and Conjectures) (+Prometeu Prim High School talk)
  • 20-22 February 2017: ICMMCMSE'17, Alagappa University, India (Keynote)
  • 12 December 2015: IMA East Midlands branch talk: "Mathematics of beauty: On infinity, fractals and recurrent sequences", Nottingham Trent University 
  • 2 April 2015: UBB Cluj, Romania, Faculty of Mathematics:  1. Mechanics and Astronomy Research Seminar (30 min): "The role of lubrication in cell adhesion: deterministic results and simulations for a simplified theoretical cell model"; 2. Complex Analysis Research Seminar (30 min): "On the geometric patterns produced by Horadam sequences in the complex plane"; 3. Analysis and Optimization Research Seminar (60 min): Extremal properties of generalized convex vector-valued functions  
  • 7 March 2015: Early Career Mathematicians' Spring Conference, University of Sheffield: How to be happy while solving (other people's) problems 
  • 20 February 2015: TCS Research Group, Loughborough University: "Complex Horadam sequences: periodicity, enumeration and applications"
  • 16 February 2015: Guest Lecture for Subjects in Computer Science, University of Derby: "On the Visualisation of Number Sequences"
  • 22 August 2014: Hanbat National University, South Korea: "Mathematics of beauty: on recurrences and emotions"
  • 30 May 2014: UBB Cluj, Romania, Faculty of Mathematics, Interdisciplinary seminar: "On the Mathematics of beauty"
  • 29 May 2014: UBB Cluj, Romania, Faculty of Mathematics, "On some properties and applications of Horadam sequences"
  • 29 October 2013: Open University Mathematics Seminar, "The geometric patterns of complex Horadam sequences"
  • 26 April 2013: SSMI, "Applied Mathematics: from life to formulas" 

Conference presentations and posters


  • 11 April 2018: Organiser of the University of Derby Workshop on "Current Issues in Mathematical Education"
  • 26-28 March 2015: Chair of "The Knowledge Triangle: Mathematics Applied to Industry", within the Exploratory Workshop on "Internationalization of Higher Education: Challenges and Rewards", Alba Iulia, Romania

Invited speakers (selection):

  • 09.2018 Preda Mihailescu (Professor, Gottingen): “With Mathematics on the road”(Public lecture)
  • 11.2017 Nicolae Popovici (Professor, UBB cluj): New algorithms for solving discrete vector optimization problems
  • 09.2017 Valeriu Anisiu (Professor UBB Cluj Napoca, Romania): Solving difficult mathematical problems with Computer Algebra Systems (focus on Maple)
  • 03.2016 Dr. Ioan Lucian Popa (UAB Alba Iulia, Romania): Dynamical Systems: A state-of-the-art survey
  • 10.2015 Ashley Buckner (Senior OR Analyst, GORS):From Electrons to the Unemployed: A (Rather) Random Walk through Maths, Statistics and Modelling
  • 02.2015 Colm Mulcahy (Professor of Mathematics, US): “Mathemagic with a deck of cards”
  • 10.2013 Dr Daniel Porumbel (Lille, France):Upper and Lower Bounds for Capacitated Arc Routing”

Experience in industry

2018: Maple (Mathematical Education Software – now deployed at University of Derby for developing E-Assessment in Maths)

  • This product allows the testing of advanced mathematics, offering step-by-step solutions and automatic marks.

2018: Vretta – Numeracy skills platform. 3 Pilot projects deployed at University of Derby starting from September 2018.

  • In Summer 2018 we have implemented the Advanced Numeracy Skills certificate (4CC503 Computational Maths and 3EJ502 Preliminary Mathematics) and Essential Numeracy Skills certificate (for Careers Futures Awards), to be granted by University of Derby and Vretta.

2017: IPEC Alba Iulia (Ceramics coloring project)

2017: UPN (Logistics, Maths Group Proect at University of Derby)

2014: Bosch Thermotechnology (VSM - Value Stream Mapping)

International experience

In 2019 I initiated the first successful Erasmus ICM 107 submission (87.5k Euro for staff and student mobilities with Anhui University, China).

In April 2021 I have coordinated the School of Computing and Engineering submission for the Turing scheme (2021-22).

New Erasmus+ links: 

1.  Babes-Bolyai University, Cluj Napoca, Romania (Mathematics and Computer Science): Erasmus+@UBB  (Dec 2014, Lead Dr. Ovidiu Bagdasar)

2. "1 DECEMBRIE 1918" University, Romania (Computer Science, Mathematics, Business): Erasmus+@UAB (Dec 2014, Lead Dr. Ovidiu Bagdasar)

3. Bogazici University, Istanbul, Turkey (Mathematics): Erasmus+@Bogazici (Nov 2015, Lead Dr. Ovidiu Bagdasar) 

4. University of Maribor, Slovenia (Mathematics): Erasmus+@Maribor (Dec 2015, Lead Dr. Ovidiu Bagdasar) 

5. Universidade da Beira Interior, Portugal (Computer Science and Mathematics) Erasmus+@UBI (Jul 2017, Lead Dr. Virginia Franquerra)

6. University of Catania, Italy (Mathematics and Statistics, ICT)  Erasmus+@Catania (Mar 2018, Lead Prof. Antonio Liotta) 

7. University of Calabria, Italy (Mathematics and Statistics, ICT)  Erasmus+@Calabria (Mar 2018, Lead Prof. Antonio Liotta)

Erasmus+ visits: 

  • June 2019: Nevsehir University, Turkey
  • May 2019: UBB Cluj Napoca, Romania
  • January 2019: UAB Alba Iulia, Romania
  • October 2018: Nevsehir University, Turkey
  • January 2018: UAB Alba Iulia, Romania 
  • May 2018: UBB Cluj, Romania 
  • May 2017: UAB Alba Iulia, Romania
  • January 2017: UBB Cluj, Romania
  • May 2016: UBB Cluj, Romania
  • January 2016: UAB Romania, Alba Iulia, Romania (visited first Erasmus+ Maths student from Derby)
  • May 2015: UBB Cluj, Romania
  • March 2015: UAB Romania, Alba Iulia, Romania

Erasmus+ guests:

  • Mar 2019 - Dr Ioan Lucian Popa, UAB Alba Iulia, Romania
  • Feb 2019 - Dr Mehmet Sari, Nesen Erturgul, Nevsehir, Turkey
  • Sept 2018 - Dr Ioan Lucian Popa, UAB Alba Iulia, Romania
  • May 2018 - Professor Nicolae Popovici - UBB Cluj Romania
  • Sept 2017 - Professor Valeriu Anisiu - UBB Cluj Romania
  • May 2017 - Professor Nicolae Popovici - UBB Cluj Romania
  • Mar 2017 - Dr Ioan Lucian Popa, UAB Alba Iulia, Romania
  • Jun 2016 - Dr Zalan Bodo - UBB Cluj Romania
  • May 2016 - Professor Nicolae Popovici - UBB Cluj Romania
  • Mar 2016 - Dr Ioan Lucian Popa, UAB Alba Iulia, Romania
  • May 2015 - Professor Nicolae Popovici - UBB Cluj, Romania

Erasmus PhD students: 

  • July-Sept 2018: Elif Tekin (PhD student, Belikeshir, Turkey) Project: Water Treatment Optimization
  • Sept 2017-Jan 2018: Imre Szigmond (PhD student, UBB Cluj, Romania) Project: Gamification within Higher Education

Research stages: 

  • November 2017: Research visit to IPEC Alba Iulia as part of the Research Project CMRCC
  • February 2017: Research visit to the Ramanujan Centre for Higher Mathematics, Alagappa University, India   
  • September 2016: Research visit to UAB and IPEC Alba Iulia, RO

Conference Organisation:

  • UoD Workshop on "Effective Mathematical Education: Improving accessibility, reducing anxiety” (5 December 2018)
  • UoD Workshop on “Current issues in the Mathematical Education” (11 April 2018)
  • 2nd TCDM'18, University of Derby, UK (co-chair)
  • TREPAM'17, UAB University, Romania (organising committee)
  • ICMMCMSE'17, Alagappa University, India (proceedings editor)
  • 1st TCDM'16, University of Derby, UK 
  • ICTAMI'15, UAB - Romania  

Additional interests and activities

Personal Interests

Music, Reading, Theology, Sports

In the media


I am actively promoting mathematics through LinkedIn ( and Twitter ( Together with students and Marketing we have designed the Maths@Derby brand, which aims to make Maths at Derby visible to wider public through
   1. Website (blogs, events, videos):
   2. YouTube:     
       We have interviewed students, Erasmus guests, and also the President of the IMA, Dr Nira Chamberlain, OBE.
   3. Twitter: @DerbyMaths, @DerbyMathsSoc (which I promote through @BagdasarO).

Numeracy and problem solving training

I have also developed numeracy training resources, courses and case studies: 

Research in the media 

The research work on Mafia networks has reverberated in the press and led to numerous articles and interviews.

Our papers on this topic sparked significant interest from scientific newspapers and magazines

Internal news articles on international visits or academic activities 

  • Ideas Factory blog, 08 March 2019 (Internationalisation of Higher Education: The link with Nevsehir)
  • Inform Issue 250, 27 February 2019: (First visit of Nevsehir staff to UoD)
  • Inform Issue 241, 12 December 2018: (Maths Education Workshop)
  • Inform Issue 239, 28 November 2018: (UoD lecturers' visit to Nevsehir)
  • Press releases by Nevsehir University about the visit of Derby Academics
  • Article in Fibhaber:
  • Article in Lalehaber
  • Inform Issue 186, 01 November 2017:  (Visit to Moldova)
  • Inform Issue 132, 05 October 2016:  (International funding workshop)
  • Ideas Factory blog, February 2015 (Good assessment and Feedback)

Recent publications


Journal articles

  • Cavallaro, A. Ficara, P. De Meo, G. Fiumara, S. Catanese, O. Bagdasar, Antonio Liotta, Criminal networks analysis in missing data scenarios through graph distances, PloS one 16 (8), e0255067 (2021) [IF: 2.740].
  • Andrica, O. Bagdasar, On k-partitions of multisets with equal sums, Ramanujan Journal of Mathematics, 55, 421-435 (2021)
  • Andrica, O. Bagdasar, On Generalized Lucas pseudoprimality of level k, Mathematics 9 (8), 838 [IF: 1.747]
  • Andrica, O. Bagdasar, On some new arithmetic properties of the generalized Lucas sequences, Meditt. J. Math (2021) [IF: 1.220]
  • Andrica, O. Bagdasar: Pseudoprimality related to the generalized Lucas sequences, Mathem. Comput Sim. (2021) [IF: 1.620]
  • Andrica, O. Bagdasar, G.-C. Turcas, On some new results for the generalised Lucas sequences, Analele Stiintifice ale Universitatii Ovidius Constanta 29(1), 17-36 (2021) [IF: 0.452]
  • J Dianavinnarasi, R Raja, J Alzabut, J Cao, M Niezabitowski, O Bagdasar, Application of Caputo–Fabrizio operator to suppress the Aedes Aegypti mosquitoes via Wolbachia: An LMI approach, Mathematics and Computers in Simulation (2021) [IF: 1.620]
  • J Dianavinnarasi, R Raja, J Alzabut, M Niezabitowski, O Bagdasar, Controlling Wolbachia Transmission and Invasion Dynamics among Aedes Aegypti Population via Impulsive Control Strategy, Symmetry 13 (3), 434 (2021) [IF: 2.645]
  • A Pratap, R Raja, J Cao, C Huang, M Niezabitowski, O Bagdasar, Stability of discrete‐time fractional‐order time‐delayed neural networks in complex field, Mathematical Methods in the Applied Sciences (2021) [IF: 2.740]
  • L Erhan, M Ndubuaku, M Di Mauro, W Song, M Chen, G Fortino, Bagdasar, A. Liotta, Smart anomaly detection in sensor systems: A multi-perspective review, Information Fusion, 67, 64-79 (2021) [IF: 13.669]
  • B Kang, F Malute, O Bagdasar, H Choo, Internet of Planet (IoP): A New Era of the Internet, IT Professional 23 (3), 76-81 (2021)
  • Cavallaro, L., Bagdasar, O., De Meo, P. et al. Artificial neural networks training acceleration through network science strategies. Soft Comput (2020) [IF: 3.050]
  • B Kang, J Lee, O Bagdasar, H Choo , Cloud IoT-based Jukebox Platform: A Music Player for Mobile Users in Café, Journal of Internet Technology 21 (5), 1363-1374 (2020) [IF: 0.935]
  • B Kang, F Malute, O Bagdasar, H Choo, DETN: delay-efficient tolerant network for Internet of Planet, IEEE Sensors Journal 21 (2), 2377-2384 (2020) [IF: 3.076]
  • W Chartbupapan, O B., K Mukdasai, A Novel Delay-Dependent Asymptotic Stability Conditions for Differential and Riemann Liouville Fractional Differential Neutral Systems with Constant Delays and Nonlinear Perturbation, Mathematics 8 (1), 82 [IF: 1.105]
  • Cavallaro, A. Ficara, P. De Meo, G. Fiumara, S. Catanese, O. Bagdasar, Antonio Liotta, Disrupting Resilient Criminal Networks through Data Analysis: The case of Sicilian Mafia, PloS one 15 (8), e0236476 (2020) [IF: 2.740].
  • O. Bagdasar, N. Popovici, S. BerryTraffic Assignment: On the Interplay between Optimization and Equilibrium Problems, Optimization 1-18 (2020) [IF: 1.860]
  • Cao, A. Pratap, R. Raja, R. P. Agarwal, O. Bagdasar, Multi-weighted complex structure on fractional order coupled neural networks with linear coupling delay: A Robust synchronization problem, Neural Processing Letters [IF: 1.787]
  • Pratap, R. Raja, C. Sowmiya, O. Bagdasar, J. Cao, G. Rajchakit, Global projective lag synchronization of fractional order memristor based BAM neural networks with mixed time varying delays, Asian Journal of Control (2018) [Impact Factor: 1.528]
  • Andrica, O. Bagdasar, Some remarks on a general family of complex polynomials, Applicable Analysis and Discrete Mathematics [IF: 0.887] (2019)
  • D. Andrica, O. Bagdasar, A new formula for the coefficients of Gaussian polynomials (Analele Stiintifice ale Universitatii Ovidius Constanta) [IF: 0.452] 
  • Andrica, O. Bagdasar, On cyclotomic polynomial coefficients, Malaysian Journal of Mathematics 12pp 
  • Andrica, O. Bagdasar, On some results concerning the polygonal polynomials, Carpathian J of Math, 2019 [IF: 0.788]
  • Pratap, R. Raja, G. Rajchakit, J. Cao, O. BagdasarMittag-Leffler state estimator design and synchronization analysis for fractional order BAM neural networks with time delays, Int J Adapt Control and Sig Proc [Impact Factor: 2.082]
  • T. E. Hunt, O. Bagdasar, D. Sheffield, M.B. Schofield: Assessing domain specificity in the measurement of mathematics calculation anxiety, Education Research International
  • O. Bagdasar, S. Berry, S. O’Neill, N. Popovici, R. Ramachandran: Traffic Assignment: Methods and Simulations for an Alternative Formulation of the Fixed Demand Problem, Mathematics and Computers in Simulation (2019) [IF: 1.476
  • Andrica, O. Bagdasar, Some remarks on 3-partitions of multisets”, Proc. of 2nd IMA TCDM’18, Electronic Notes in Discrete Math, Elsevier 70 (2018), 1-8.
  • O. Bagdasar, R.-J. Tatt, On some new arithmetic functions involving prime divisors and perfect powers, Proc. of 2nd IMA TCDM’18, Electronic Notes in Discrete Math, Elsevier 70 (2018), 9-15.
  • A. Bagdasaryan, O. Bagdasar, On an arithmetic triangle of numbers arising from inverses of analytic functions, Proc. of 2nd IMA TCDM’18, Electronic Notes in Discrete Math, Elsevier 70 (2018), 17-24.
  • Pratap, R. Raja, C. Sowmiya, O. Bagdasar, J. Cao, G. Rajchakit, Robust generalized Mittag-Leffler synchronization of fractional order neural networks with discontinuous activation and impulsesNeural Networks (2018) [Impact Factor: 7.197]
  • Bagdasar, N. Popovici: Unifying local-globaltype properties in vector optimization, Journal of Global Optimization (2018) [IF: 1.728]
  • A. Pratap, R. Raja, C. Sowmiya, O. B., J. Cao, G. Rajchakit, Robust generalized Mittag-Leffler synchronization of fractional order neural networks with discontinuous activation and impulsesNeural Networks (accepted 2018)
  • O. B., N. Popovici: Unifying local-global type properties in vector optimization, Journal of Global Optimization (accepted 2018)
  • O. B., N. Popovici: Extremal properties of generalized convex vector functions, J Nonlinear Convex Analysis, Vol. 18 (12) (2017) 
  • O. B., P.J. Larcombe, On the masked periodicity of Horadam sequences: A generator-based approach, Fibonacci Quart. (2017) 
  • O. B., I-L. Popa, On the periodicity of certain non-homogeneous complex linear recurrences, Electron. Notes Discrete Math, Vol. 56, 7-13 (2016)
  • O. B., P.J. Larcombe and, A. Anjum, On the structure of periodic complex Horadam sequencesCarpathian J Math, (2016)
  • O. B., N. Popovici, Local maximum points of explicitly quasiconvex functionsOptimization LettersVol. 9(4)769-777 (2015)
  • O. B., On some functions involving the lcm and gcd of integer tuplesAppl Math Inform and Mech, Vol 6(2), 91-100 (2014)
  • O. B. and P.J. Larcombe, On the characterization of periodic Horadam sequencesJ Differ Equ App, 1069-1090 (2014)
  • P.J. Larcombe, O. B., and E.J. Fennessey, On a Result of Bunder Involving Horadam Sequences: A New Proof, Fibonacci Quart, Vol. 52(2), 175-177 (2014)
  • O. B. and P.J. Larcombe, On the number of complex Horadam sequences with a fixed periodFibonacci Quart, Vol. 51(4), 339-347 (2013)
  • O. B., P.J. Larcombe, A. Anjum, Particular orbits of periodic Horadam sequences, Octogon Math Mag, 21 (1) (2013)
  • O. B. and P.J. Larcombe, On the characterization of periodic Horadam sequencesFibonacci Quart, Vol. 51(1), 28-37 (2013)
  • P.J. Larcombe, O. B., and E.J. Fennessey, Horadam Sequences: A Survey, Bulletin of the ICA, 67 (2013)
  • O. B., M. Bencze, J.L. Díaz-Barrero, Blind men and the HypercubesMissouri J Math Sci, 23 (1), 19-26 (2011)
  • O. B., Complementary inequalities involving the Stolarsky meanJ Inequal Appl, Vol. 2010, Art. No. 492570, 10pp (2010)
  • O. B., D. Valcan, Generalizations of some divisibility relations in NCreat Math Inform, 18, 92-99 (2009)
  • O. B., Inequalities for chains of normalized sums, JIPAM, 9, 7pp (2008)
  • O. B., The Extension Of a Cyclic Inequality to the Symmetric Form, JIPAM, 9, 10pp (2008)

Conference papers

  • P Mrozek, J Panneerselvam, O Bagdasar, Efficient Resampling for Fraud Detection During Anonymised Credit Card Transactions with Unbalanced Datasets, 2020 IEEE/ACM 13th International Conference on Utility and Cloud Computing
  • D. Andrica, O.B., New results and conjectures on 2-partitions of multisets, 7th ICSMAO (UAE) (2017)
  • O.B., A. Birlutiu, M. Chen and I-L Popa, Qualitative Case Study Methodology: Automatic Design and Correction of Ceramic Colors, 21st ICSTCC, Romania (2017) 
  • O. B. and M. Chen, A Horadam-based Pseudo-random number generator, Proceeding of UKSim-AMSS 16th (2014)
  • M. Trovati and O. B., Influence Discovery in Semantic Networks: An Initial Approach, Proceeding of UKSim-AMSS 16th (2014)
  • O. B., Using Computer Tests to Teach Mathematics - A Study Case, 4th International Symposium "Mathematical Education in the Current European Context", Romania (2013)
  • O. B., The Number of Pairs of Integers with the Same lcm, 3rd International Symposium "Mathematical Education in the Current European Context", Romania (2012)

Open Questions and Symposium papers:

  • M. Stubley, O.B., On the role of Open Questions in the Mathematical Education, 7th International Symposium "Mathematical Education in the Current European Context", December 16th, Romania (2016)
  • G. Illsley, O.B., Understanding the fear of mathematics: Recipes for students and teachers, 8th  International Symposium "Mathematical Education in the Current European Context", December 16th, Romania (2017).
  • O.B. and M. Stubley, On OQ.3184, Octogon Math. Mag, 24 (2) (2016)
  • O.B. and M. Stubley, On OQ.4595 and OQ.4537, Octogon Math. Mag, 25 (1) (2017) 
  • O.B., A. Birnie, C. Pissarides and A. Ahmad, On OQ.3166 and OQ.3484 in Octogon Math. Mag, 24 (2) (2016)
  • O.B., A. Birnie, C. Pissarides and A. Ahmad, On OQ.3928, On OQ.4259, On OQ.4537 in Octogon Math. Mag, 25 (1) (2017)
  • O.B., R. Connis and A. Baker: On OQ.4836 and OQ.4837 in Octogon Math. Mag, 25 (1) (2017)