CURRICULUM VITAE AIDA TOMA

CURRICULUM VITAE AIDA TOMA Department of Applied Mathematics Bucharest Academy of Economic Studies Piaţa Romană 6, Bucharest, România e-mail: aida toma@yahoo.com 1 Education 1988-1992 Alexandru Vlahuţă National College (Mathematics - Physics section), Râmnicu Sărat, Romania 1992-1997 University of Bucharest, Faculty of Mathematics 1997 Bachelor of science. The advanced university degree (Thesis: Spectral characterizations of commutative Banach algebras ) 1997-1998 Master Degree in Real and Complex Analysis, University of Bucharest, Faculty of Mathematics (Dissertation: Applications of complex functions in locally m-convex algebras ) 2005 Ph.D. in the field of Robust Statistics, University of Bucharest, Faculty of Mathematics (Ph.D. Thesis: Robust statistical methods and applications, promotor Professor Ion Văduva), distinction Magna cum Laude 2 Academic Awards and Distinctions The Jan Tinbergen Award granted by the International Statistical Institute in the framework of the 54th Session held in Berlin, Germany (13-20 August 2003). Award granted by the Romanian Statistical Society for the best paper presented in the framework of Octav Onicescu seminar, 2004. N.N. Constantinescu Award granted by the Bucharest Academy of Economic Studies, 2005. Excellence Diploma granted by the Bucharest Academy of Economic Studies, for scientific results published in journals indexed in ISI Web of Science, 2007. The First Prize for paper presentation at the PhD Young Researchers Scientific Section of the 4th International Conference for Applied Statistics, November 20th, 2008. Award for excellence in scientific research, accorded by the Bucharest Academy of Economic Studies, for articles published abroad in ISI Thomson journals, 2013. Diploma Opera Omnia for excellence in scientific research accorded by the Bucharest Academy of Economic Studies, 2014. 1

3 Academic and Research Positions 1998-2001 Instructor, Department of Mathematics, Academy of Economic Studies, Bucharest 2001-2004 Teaching Assistant, Department of Mathematics, Academy of Economic Studies, Bucharest 2004-2007 Lecturer, Department of Mathematics, Academy of Economic Studies, Bucharest 2007-2009 Associate Professor, Department of Mathematics, Academy of Economic Studies, Bucharest 2009 - Professor, Department of Applied Mathematics, Bucharest Academy of Economic Studies, Bucharest 2007 - Senior Researcher II, Gheorghe Mihoc - Caius Iacob Institute of Mathematical Statistics and Applied Mathematics of the Romanian Academy, Bucharest 4 Activity Abroad Tempus scholarship, Tor Vergata University, Rome, Italy (1 April - 30 June 1998) Erasmus - Socrates doctoral scholarship, Pierre et Marie Curie University - Paris 6, Paris, France (12 March - 4 June 2001) Governmental scholarship, Pierre et Marie Curie University - Paris 6, Paris, France (1 March - 29 June 2003) Research visit, Pierre et Marie Curie University - Paris 6, Paris, France (1-24 September 2006) Research visit, Pierre et Marie Curie University - Paris 6, Paris, France (27 August - 27 Sept. 2007) Research visit, Pierre et Marie Curie University - Paris 6, Paris, France (2-14 March 2011) Research visit, Pierre et Marie Curie University - Paris 6, Paris, France (1 September - 15 October 2011) Research visit, Pierre et Marie Curie University - Paris 6, Paris, France (1 March - 16 April 2012) Research visit, Pierre et Marie Curie University - Paris 6, Paris, France (29 August - 12 Sept. 2015) 5 Teaching Applied Mathematics to Economics Probability Theory and Mathematical Statistics Linear Algebra Financial Mathematics 2

6 Research Grants 1. Robust estimation methods and applications (CNCSIS 16Tdn/2004) obtained by national competition and granted by the National Commission of Scientific Research for High Education (Project Director) 2. Robust methods in parametric estimation (CNCSIS AT 125/2006-2007) obtained by national competition and granted by the National Commission of Scientific Research for High Education (Project Director) 3. PN-II-RU-TE-2012-3-0007 Flexible statistical modeling and robust analysis of financial data, obtained by national competition and financed by CNCS-UEFISCDI, 2013-2016, (Project Director) 7 Editorial Activities 2011 - USA. Member of the Editorial Bord of Open Journal of Statistics, Scientific Research Publishing, 2012 - Member of the Editorial Bord of Statistics Research Letters, World Academic Publishing, Hong Kong. 2013 - Member of the Editorial Bord of International Journal of Advanced Statistics and Probability, Science Publishing Corporation, Bremen, Germany. Referee work for many journals including: Journal of Statistical Planning and Inference, Journal of Multivariate Analysis, Bernoulli, Scandinavian Journal of Statistics, IEEE Transactions on Information Theory, Statistical Papers, Annals of the Institute of Statistical Mathematics, Advances in Statistical Analysis, Entropy, Comptes Rendus Mathematique, Communications in Statistics - Simulation and Computation, Algorithms, Journal of the Korean Statistical Society, Kybernetica, Journal of Systems Science and Complexity, Statistica Sinica, European Journal of Operational Research, Progress in Applied Mathematics. Referee work for the publishing houses: MatrixRom Publishing House, Academy of Economic Studies Publishing House. Reviewer for Mathematical Review. 8 Organization of Scientific Meetings Organizer of the special session Statistique et probabilities appliquees (together with Prof. Michel Broniatowski, Univ. Paris 6), 10 eme Colloque Franco-Roumain de Mathematiques Appliquees, Poitiers, France, 26-31 August 2010. Member of the Organizing Committee of National Conference on Probability and Statistics, 2007, 2011, 2012. Member of the Scientific Committee of National Conference on Probability and Statistics, 2013, 2015, 2016. 3

9 Professional Membership Member of the Romanian Society of Probability and Statistics - SPSR. Member of the Romanian Mathematical Society - SSMR. Member of the Bernoulli Society for Probability and Mathematical Statistics. Member of the Specialized Team RACDS: Robust Analysis of Complex Data Sets in the framework of CMStatistics. 10 Publications 10.1 Articles Refereed by Peers 1. Aida Popa (Toma), (2001) A generalization of Vesentini s theorem to locally m-convex algebras, Rendiconti di matematica e delle sue applicazione, 21, 223 230. 2. Aida Toma, (2002) Influence functions of eigenvalues and eigenvectors of a covariance matrix, Pub. Inst. Stat. Univ. Paris, XXXXVI, Fasc. 1-2, 73 88. 3. Aida Toma, (2003) Commutativity criterions in locally m-convex algebras, Extracta Mathematicae, Vol. 18, 1, 1 9. 4. Aida Toma, (2003) Robust estimators of the correlation matrix for the multivariate lognormal distribution, Mathematical Reports, 5 (55), 2, 175 181. 5. Aida Toma, (2003) On the consistency of a robust estimator of the covariance matrix for a mixture model, Revue Roumain de Mathematiques, Pure et Appliqué, 48, 4, 423 430. 6. Aida Toma, (2003) Robust estimators for the parameters of multivariate lognormal distribution, Communications in Statistics-Theory and Methods, 32, issue 7, 1405 1417. 7. Aida Toma, (2003) Robust estimations for multivariate normal-lognormal distributions, Bulletin of International Statistical Institute - Invited papers, Volume LX, Book 1, 79 89. 8. Aida Toma, (2004) Bounded influence estimators for multivariate lognormal distributions, C. R. Acad. Sci. Paris, Ser. I 338, 723 728. 9. Aida Toma, (2007) Robustness aspects for some functionals based on divergences, Economic Computation and Economic Cybernetics Studies and Research, 41, 1-2, 223 230. 10. Aida Toma, (2007) Minimum Hellinger distance estimations for some multivariate distributions: influence functions and breakdown point results, C.R. Acad. Sci. Paris, Ser. I 345, 353 358. 11. Aida Toma, (2008) Minimum Hellinger distance estimators for multivariate distributions from the Johnson system, Journal of Statistical Planning and Inference, 138, 3, 803 816. 12. Aida Toma, (2009) Optimal robust M-estimators using divergences, Statistics & Probability Letters, 79, 1, 1 5. 4

13. Aida Toma, (2009) Integral representation for powers of elements in locally m-convex algebras and applications, Rendiconti del Circolo Matematico di Palermo, 58, 29 40, Springer-Verlag. 14. Aida Toma, Samuela Leoni-Aubin, (2010) Robust tests based on dual divergence estimators and saddlepoint approximations, Journal of Multivariate Analysis, 101, 5, 1143 1155. 15. Aida Toma, (2010) Robust tests based on density power divergence estimators and saddlepoint approximations, Mathematical Reports, 12(62), No. 4, 383 392. 16. Aida Toma, Michel Broniatowski, (2011) Dual divergence estimators and tests: robustness results, Journal of Multivariate Analysis, 102, 1, 20 36. 17. Aida Toma, (2012) Robust estimations for financial returns: an approach based on pseudodistance minimization, Economic Computation and Economic Cybernetic Studies and Research, 46, 1, 117 131. 18. Michel Broniatowski, Aida Toma, Igor Vajda, (2012) Decomposable pseudodistances and applications in statistical estimation, Journal of Statistical Planning and Inference, 142, 2574 2585. 19. Aida Toma, Samuela Leoni-Aubin, (2013) Optimal robust M-estimators using Renyi pseudodistances, Journal of Multivariate Analysis, 115, 359 373. 20. Aida Toma, Samuela Leoni-Aubin, (2013) Portfolio selection using minimum pseudodistance estimators, Economic Computation and Economic Cybernetic Studies and Research, 46, 117 132. 21. Aida Toma, (2013) Robustness of dual divergence estimators for models satisfying linear constraints, Comptes Rendus Mathematique, 351, 7-8, 311-316. 22. Aida Toma, (2014) Model selection criteria using divergences, Entropy, 16, 5, 2686-2698. 23. Aida Toma, Samuela Leoni-Aubin, (2015) Robust portfolio optimization using pseudodistances, PLoS ONE, 10, 1-26. 10.2 Articles in Refereed Proceedings Volumes 1. Aida Toma, (2005) Principal component analysis based on some robust estimators of the covariance or correlation matrix: influence functions and efficiencies, Proceedings of 6th Balkan Conference on Operational Research, Thessaloniki, Greece. 2. Aida Toma, (2008) Robust estimations and tests using divergences and duality techniques, Proceedings of 4th International Conference on Applied Statistics, special number of Romanian Statistical Review, 5 pg. 3. Aida Toma, Samuela Leoni-Aubin, (2009) Robust tests based on divergence optimization, Proceedings of the 9th Balkan Conference on Operational Research, BALCOR 2009, Editors Vasile Preda, Ion Mierluş-Mazilu, ISBN 973-86979-9-9, Publisher Eurogema Exim SRL, 4 pg. 4. Aida Toma, Michel Broniatowski, (2011) Estimation criteria based on pseudodistance minimization, Proceedings of 14th Applied Stochastic Models and Data Analysis Conference (ASMDA 2011), 1348-1355, ISBN 97888467-3045-9. 5

5. Aida Toma, Samuela Leoni-Aubin, (2014) Minimum pseudodistance estimators and applications to portfolio optimization, Proceedings of 15th Applied Stochastic Models and Data Analysis (ASMDA 2013) International Conference, Mataro (Barcelona) Spain 25-28, June 2013, 931-938. 6. Aida Toma, Silvia Dedu, (2014) Quantitative techniques for financial risk assessment: a comparative approach using different risk measures and estimation methods, Procedia Economics and Finance, 8, 712-719. 7. Silvia Dedu, Aida Toma, (2015) An integrated risk measure and information theory approach for modeling financial data and solving decision making problems, Procedia Economics and Finance, 22, 531-537. 10.3 Books 1. Gheorghe Cenuşă, Argentina Filip, Constantin Raischi, Aida Toma, Sorin Baz, Bogdan Iftimie, Luiza Bădin, Adriana Agapie, (2000) Mathematics for Economists. Book of Problems, Cison Publ. House, Bucharest, 438 pg., ISBN 973-99725-3-5. 2. Gabriela Beganu, Aida Toma, Luiza Badin, Liana Manu, Mihaela Covrig, (2002) Probability Theory and Mathematical Statistics. Book of Problems, Meteora Press Publ. House, Bucharest, 336 pg., ISBN 973-8339-13-8. 3. Aida Toma, (2002) Linear Algebra. Book of Problems, Economic Publish. House, Bucharest, 336 pg, ISBN 973-590-597-3. 4. Aida Toma, Dumitru D. Drăghia (2006) Topological Algebras, Romanian Academy Publish. House, 324 pg., ISBN (10) 973-27-1423-9. 5. Aida Toma, (2009) Robust methods for multivariate estimation, MatrixRom, Publish. House, 150 pg., ISBN 978-973-755-469-7. 6. Aida Toma, (2013) Robust statistical methods with applications in portfolio optimization, Expert Publish. House, 100 pg. ISBN 978-973-618-368-8. 10.4 Chapters in Books 1. Aida Toma, (2004) Robust estimations for multivariate sinh 1 -normal distributions, in Theory and Applications of Recent Robust Methods, edited by M. Hubert, G. Pison, A. Struyf and S. Van Aelst, Series: Statistics for Industry and Technology, Birkhauser, Basel, 355-366. 2. Aida Toma, Samuela Leoni-Aubin, (2014) Minimum pseudodistance estimators and applications to portfolio optimization, In New Perspectives on Stochastic Modeling and Data Analysis, J.R. Bozeman, V. Girardin and C.H. Skiadas (Eds.), ISAST International, 79-86. 6

11 Presentations at Scientific Meetings 11.1 International Conferences 1. Aida Toma, Principal component analysis based on some robust estimators of the covariance or correlation matrix: influence functions and efficiencies, 6th Balkan Conference on Operational Research, Thessaloniki, Greece, (22-25 May 2002). 2. Aida Toma, Some robust estimators for multivariate location and scatter, 24th European Meeting of Statisticians and 14th Prague Conference on Information Theory, Statistical Decision Functions and Random Processes, held in Prague, Czech Republic, (19-23 August 2002). 3. Aida Toma, Estimateurs robustes de la matrice des covariances pour lois lognormales et normaleslognormales multidimensionelles, 6 éme Colloque Franco-Roumain de Mathematiques Appliquees, Perpignian, France, (2-6 September 2002). 4. Aida Toma, Robust multivariate estimators applied in statistical data analysis, 10th International Conference on Economic Cybernetics, held in Bucharest, (4-5 October 2002). 5. Aida Toma, Using an estimator of the covariance matrix based on the sign covariance matrix at multivariate normal-lognormal models, First EMS, SMAI and SMF Joint Conference Applied Mathematics and Applications of Mathematics - AMAM 2003, Nice, France, (10-13 February 2003). 6. Aida Toma, Robust estimations for multivariate normal-lognormal distributions, 54th Session of the International Statistical Institute, Berlin, Germany, Invited Speaker (13-20 August 2003). 7. Aida Toma, Minimum Hellinger distance estimators for some multivariate distributions, Conference of the Society for Multivariate Analysis in the Behavioral Sciences - SMABS, Jena, Germany, (17-22 July 2004). 8. Aida Toma, Minimum Hellinger distance estimators for some multivariate distributions, The Sixth edition of the joint meeting of the Institute of Mathematical Statistics and the Bernoulli Society, Barcelona, (25-31 July 2004). 9. Aida Toma, Robustness aspects for some minimum distance functionals, 8 éme Colloque Franco- Roumain de Mathematiques Appliquees, Chambery, France, (28 August - 1 September 2006) 10. Aida Toma, Bounded influence tests through divergences, International Conference Trends and Challenges in Applied Mathematics, Technical University of Civil Engineering Bucharest, Romania, (20-23 June 2007). 11. Aida Toma, Robust estimations and tests through divergences, 9 éme Colloque Franco-Roumain de Mathematiques Appliquees, Braşov, Romania, (28 August - 2 September 2008). 12. Aida Toma, Robust estimations and tests using divergences and duality techniques, 4th International Conference on Applied Statistics - ICAS 4, Bucharest, Romania, (20-22 November 2008). 13. Aida Toma, Samuela Leoni-Aubin, Robust inference based on divergence optimization, The 9th Balkan Conference on Operational Research - BALCOR 2009, Constanţa, Romania, (2-6 September 2009). 7

14. Aida Toma, Robust statistical methods, Romanian-American Workshop Applications in Statistics, held at Gheorghe Mihoc - Caius Iacob Institute of Mathematical Statistics and Applied Mathematics, Bucharest, (13 May 2010). 15. Aida Toma, Estimation Criteria Based on Pseudodistance Minimization, 14th Applied Stochastic Models and Data Analysis Conference - ASMDA 2011, Rome, Italy, 6-10 June 2011, (Invited Speaker at the special session Building models and handling statistical inference, organized by Prof. Vladimir Zaiats) (6-10 June 2011) 16. Aida Toma, Robust estimation for financial returns: an approach based on pseudodistance minimization, The Seventh Congress of Romanian Mathematicians, Braşov, Romania, (29 June - 5 July 2011). 17. Aida Toma, Robust and efficient estimation methods for asset returns, The Economic Scientific Research, Support to Welfare and Human development in European Context - Post Doctoral School - Socio Economic Approach: Multi-Scale Integrated Analysis and Macroeconomic Modeling, Bucharest (Plenary Conference) (22-23 November 2011). 18. Aida Toma, Samuela Leoni-Aubin, Minimum pseudodistance estimators and applications to portfolio optimization, The 15th Conference Applied Stochastic Models and Data Analysis - ASMDA 2013, Mataro, Barcelona, Spain (25-28 June 2013). 19. Aida Toma, Samuela Leoni-Aubin, Robust minimum pseudodistance estimators and applications in portfolio optimization, International Conference on Robust Statistics - ICORS 2013, Sankt Petersburg, Russia (8-12 July 2013). 20. Aida Toma, Silvia Dedu, Quantitative techniques for financial risk assessment: a comparative approach using different risk measures and estimation techniques, International Conference Economic Scientific Research - Theoretical, Empirical and Practical Approaches ESPERA 2013, Bucharest (11-12 December 2013) 21. Aida Toma, Silvia Dedu, The minimum pseudodistance approach: an application to extreme quantile estimation in finance, Stochastic Modeling Techniques and Data Analysis International Conference SMTDA 2014, Lisbon, Portugal (11-14 June 2014). 22. Aida Toma, Silvia Dedu, New methods for extreme quantile estimation in finance, International Conference Economic Scientific Research - Theoretical, Empirical and Practical Approaches, ES- PERA2014, Bucharest (13-14 November 2014). 23. Silvia Dedu, Aida Toma, An integrated risk measure and information theory approach for modeling financial data and solving decision making problems, International Conference Economic Scientific Research - Theoretical, Empirical and Practical Approaches ESPERA 2014, Bucharest (13-14 November 2014). 24. Aida Toma, Amor Keziou, Empirical divergence estimates in moment condition models: robustness properties, 16th Conference of the Applied Stochastic Models and Data Analysis International Society & Demographic Analysis and Research International Workshop, Piraeus, Greece (30 June - 4 July 2015). 8

25. Aida Toma, Amor Keziou, Empirical divergence estimates in moment condition models: robustness properties, 8th International Conference of the ERCIM WG on Computational and Methodological Statistics (CM Statistics 2015), Senate House, University of London, London, United Kingdom (Invited Speaker at the special session Multivariate Analysis, organized by Prof. Apostolos Batsidis) (12-14 December 2015). 26. Aida Toma, Amor Keziou, Robust inference with minimum dual divergence estimators for moment condition models, International Conference on Robust Statistics ICORS 2016, Geneva, Switzerland (4-8 July 2016). 27. Aida Toma, Minimum dual divergence estimators for moment condition models, XIIIeme Colloque Franco-Roumain de Mathematiques Appliquees, Iasi, Romania (25-29 August 2016). (Invited speaker at the special session Statistics organized by Cristian Preda and Celine Lacaux) 11.2 National Conferences 1. Aida Toma, A robust estimator of the covariance matrix for multivariate lognormal distributions, 5th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (21-22 February 2002). 2. Aida Toma, Estimating the parameters of the multivariate normal-lognormal distribution using Oja median and a SCM based estimator, 6th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (21-22 February 2003). 3. Aida Toma, Minimum Hellinger distance estimators for some multivariate distributions, 7th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (20-21 February 2004). 4. Aida Toma, Robust estimations for randomly censored data, 8th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (22-23 April 2005). 5. Aida Toma, Robustness aspects for some minimum divergence functionals, 9th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (28-29 April 2006). 6. Aida Toma, Parametric estimators and tests using divergences, 11th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (18 April 2008). 7. Aida Toma, Robust saddlepoint test statistics based on divergence optimization, 12th Conference of the Society for Probabilities and Statistics from Romania, Constanţa, (10-11 April 2009). 8. Aida Toma, Optimal robust M-estimators using Renyi pseudodistances, 13th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (16-17 April 2010). 9. Aida Toma, Decomposable pseudodistances and applications in continuous families, 14th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (29 April 2011). 10. Aida Toma, Samuela Leoni-Aubin, Minimum pseudodistance estimators of multivariate location and scatter and applications, 15th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (27 April 2012). 9

11. Aida Toma, Robust statistical methods with applications in portfolio optimization, National Workshop The Economic Scientific Research, Support of Welfare and Human Development in European Context, National Institute of Economic Research Costin C. Kiritescu, Romanian Academy (25 March 2013). 12. Aida Toma, Amor Keziou, Robustness of dual divergence estimators for moment condition models, 16th Conference of the Society for Probabilities and Statistics from Romania, Bucharest, (26 April 2013). 13. Aida Toma, Amor Keziou, Empirical divergence estimates in moment condition models: robustness properties, 18th Conference of the Society for Probabilities and Statistics from Romania, Bucharest (8 May 2015). 14. Aida Toma, Amor Keziou, Minimum dual divergence estimators for moment condition models: a Monte-Carlo simulation study, 19th Conference of the Society for Probabilities and Statistics from Romania, Bucharest (27 May 2016). 11.3 Scientific Seminars 1. Aida Toma, Robust methods for estimation, Scientific seminar Stochastically Modeling and Simulations, University of Bucharest, Faculty of Mathematics, (2 March 2001). 2. Aida Toma, Influence functions of eigenvalues and eigenvectors of a covariance matrix, Scientific seminar Statistique Appliquee et Applications de la Statistique, LSTA, University Pierre et Marie Curie, Paris, France, (28 May 2001). 3. Aida Toma, Robust methods in regression, Scientific seminar Stochastically Modeling and Simulations, University of Bucharest, Faculty of Mathematics, (29 June 2001). 4. Aida Toma, Robust methods for lifetime data, Scientific seminar Stochastically Modeling and Simulations, University of Bucharest, Faculty of Mathematics, (5 May 2002). 5. Aida Toma, The analysis of censored data, Scientific seminar Stochastically Modeling and Simulations, University of Bucharest, Faculty of Mathematics, (12 December 2002). 6. Aida Toma, Robust estimations for multivariate lognormal distributions: influence functions and efficiencies, Scientific seminar Divergence and Entropy, LSTA, University Pierre et Marie Curie, Paris, France, (21 May 2003). 7. Aida Toma, Parametric estimations in models associated with PERT type problems, Scientific seminar Octav Onicescu, National Commission of Statistics, - Invited Speaker (6 November 2003). 8. Aida Toma, Minimum divergence estimators and tests: robustness results, Scientific seminar of the Mathematics Department, Academy of Economic Studies, Bucharest, (17 June 2008). 10

12 Summer Schools, International Courses and other Conferences Attended 1. Summer School Evolution Problems, Braşov, Romania, July 1998. 2. Attendance at the short course presented by Professor Donald Rubin, Univ. Harvard USA and entitled Basic Concepts of Statistical Inference for Causal Effects in Experiments and Observational Studies, Jena, Germany, 17 July 2004. 3. Fourth European Congress of Mathematics, Stocholm, Sweden, June 27-July 2, 2004. 4. Colloque Statistique nonparametrique et statistique des processus, LSTA et ISUP, Paris, France, 14 September 2007. 13 Miscellanea Member of Group de Travail - Divergence et Entropie, Laboratoire de Statistique Theorique et Appliquee, Universite Pierre et Marie Curie, Paris 6, 2003. Member of the comission of the competition for obtaining a didactic position at the Department of Mathematics, Bucharest Academy of Economic Studies, 2008. Member of the PhD comission of Mrs. Galina Nicorici, at the Faculty of Mathematics, University of Bucharest, January 2012. Member of the comission of the competition for obtaining didactic positions at the Department of Applied Mathematics, Bucharest Academy of Economic Studies, September 2013. Member of the comission of the competition for obtaining a didactic position at the Department of Mathematics, Faculty of Mathematics and Computer Science, University of Bucharest, September 2014. Member of the PhD comission of Mrs. Tuculan Diaconu Maria-Crina, at the Faculty of Mathematics, University of Bucharest, December 2015. Member of the comission of the competition for obtaining didactic positions at the Department of Applied Mathematics, Bucharest Academy of Economic Studies, July 2016. 11