Dr Ovidiu Bagdasar

Module Leader

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

Programme Leader: MSc Computational Mathematics

Maths&Computing: Erasmus+ Departmental Coordinator

Placement Tutor: Mathematics students (2012-). 

Motto: "All what is correct thinking is either mathematics or feasible to be transposed in a mathematical model." (G. Moisil 1906 - 1973)

• Discover new Mathematical results 
• 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

• Recurrent sequences and their applications 
• Counting problems and Combinatorics
• Optimisation and Convex Analysis 
• Mathematical Inequalities
• Mathematical modelling 

Memberships

• AMS - American Mathematical Society - Member
• KMS - Korean Mathematical Society
• SSMR - Romanian Mathematical Society
• IMA  - Institute of Mathematics and its Applications - Member  
• Fellow of HEA - Higher Education Academy

Collaborations

• Reviewer for Mathematical Reviews
• Reviewer for the Journal of Number Theory
• Reviewer for the Journal of Integer Sequences 
• Editor for the Octogon Mathematical Magazine, Romania
• Member of CDAM and DISYS research groups at the University of Derby.
• External collaborator of the Analysis and Optimization Research Group, UBB Cluj, Romania

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

Books

• O. B., N. Popovici, S. Berry: Sect. 7.3 "Transportation management: methods and algorithms" in Guide to Computational Modelling for Decision Processes: Theory, Algorithms, Techniques and Applications (Springer, 2017) 
• O. B., Concise Computer Mathematics: Tutorials on Theory and Problems, Springer Briefs in Computer Science, 2013.

Journal articles

• O.B., P.J. Larcombe, On the masked periodicity of Horadam sequences: A generator-based approach, Fibonacci Quart. (accepted)
• O. B., N. Popovici: Extremal properties of generalized convex vector functions, Journal of Nonlinear Convex Analysis (accepted)
• O. B., I-L. Popa, On the periodicity of certain non-homogeneous complex linear recurrences, Electron. Notes Discrete Math, Vol. 56, 7-13 (2016)
• I-L. Popa, T. Ceausu, O. B., Characterizations of generalized exponential trichotomies for linear discrete-time systems, Electron. Notes Discrete Math, Vol. 56, 65-70 (2016)
• O. B., P.J. Larcombe and, A. Anjum, On the structure of periodic complex Horadam sequences, Carpathian J Math, (2016).
• O. B., N. Popovici, Local maximum points of explicitly quasiconvex functions, Optimization Letters, Vol. 9(4), 769-777 (2015)
• O. B., On some functions involving the lcm and gcd of integer tuples, Appl Math Inform and Mech, Vol 6(2), 91-100 (2014)
• O. B. and P.J. Larcombe, On the characterization of periodic Horadam sequences, J 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 period, Fibonacci 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)
• P.J. Larcombe, O. B., and E.J. Fennessey, On a Result of Bunder Involving Horadam Sequences: A Proof And Generalization, Fibonacci Quart, Vol. 51(2), 174-176 (2013)
• O. B. and P.J. Larcombe, On the characterization of periodic Horadam sequences, Fibonacci 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 Hypercubes, Missouri J Math Sci, 23 (1), 19-26 (2011)
• O. B., Complementary inequalities involving the Stolarsky mean, J Inequal Appl, Vol. 2010, Art. No. 492570, 10pp (2010)
• O. B., D. Valcan, Generalizations of some divisibility relations in N, Creat 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

• D. Andrica, O.B., New results and conjectures on 2-partitions of multisets, 7^th ICSMAO (UAE) (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:

Invited lectures and seminars

• 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

• 25-29 August 2016:      XIII^th Colloq Fr-Ro (talk: Extremal properties of explicitly quasiconvex vector functions)
• 19-22 May 2016:           XX^th SSMR (talk: On the geometry of linear recurrences in the complex plane)  
• 22-23 March 2016:        1^st TCDM (talk:"On the number of tuples with the same lcm")
• 17-20 September 2015: ICTAMI 2015, (Talk: "On Arithmetic Functions and Integer Tuples with the Same LCM")
• 6-10 July 2015: 25th BCC (Talk: "Enumeration of periodic Horadam sequences")  
• 13-21 August 2014: ICM 2014, Seoul, Korea, On the enumeration of periodic generalized Horadam sequences (talk)
• 6-11 August 2014: ANTS XI, Korea, On certain computational and geometric properties of Horadam orbits (poster) 
• 26-28 March 2014: UKSim2014, Cambridge, UK (Talk, Session Chair)
• 1-5 July 2013: 24th BCC (Talk: "Enumeration of periodic Horadam sequences")
• 1-7 July 2010: ESOF 2010 (European Science Open Forum), Italy (poster)

Workshops

• 26-28 March 2015: Chair of "The Knowledge Triangle: Mathematics Applied to Industry", within the Exploratory Workhop on "Internationalization of Higher Education: Challenges and Rewards", Alba Iulia, Romania

New Erasmus+ links:  

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

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

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

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

Erasmus+ visits: 

• March 2015:    UAB Romania, Alba Iulia, Romania
• May 2015:       UBB Cluj, Romania
• January 2016: UAB Romania, Alba Iulia, Romania (visited first Erasmus+ Maths student from Derby)
• May 2016:       UBB Cluj, Romania
• January 2017: UBB Cluj, Romania

Erasmus+ guests: 

• May 2015    - Professor Nicolae Popovici - UBB Cluj, Romania 
• March 2016 - Dr Ioan Lucian Popa, UAB Alba Iulia, Romania
• May 2016    - Professor Nicolae Popovici - UBB Cluj Romania  
• June 2016   - Dr Zalan Bodo - UBB Cluj Romania
• March 2017 - Dr Ioan Lucian Popa, UAB Alba Iulia, Romania
• May 2017    - Professor Nicolae Popovici - UBB Cluj Romania  

Research stages: 

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