Publicaţii, Congrese

Cărţi

M. Sterpu, C. Rocșoreanu, Modelarea și simularea proceselor economice , Ed. Universitaria Craiova, 2007, p. 136, ISBN 978-606-510-078-7.

M. Sterpu, Modelare algoritmică. Aplicații în C și Maple , Ed. Universitaria Craiova, 2006, p. 190, ISBN 973-742-427-1, ISBN 978-973-742-427-3.

Mariana Popescu, Mihaela Sterpu, Geometrie analitică. Teorie și aplicații. Ed. Universitaria Craiova, 2004, p. 384, ISBN 973-8043-473-3.

G. Murarescu, M. Sterpu, Teoria diferențiala a curbelor și suprafețelor. Teorie și aplicații , Ed. Universitaria Craiova, 2003, p. 203, ISBN 973-8043-345-5.

M. Sterpu, Dinamica și bifurcații pentru doua modele Van der Pol generalizate (Dynamics and bifurcations for two generalized Van der Pol models) , Ed. Univ. din Pitesti, Seria Matematica Aplicata si Industriala 8, 2001, p. 238, ISBN 973-8212-55-3. (in romanian, with an extended abstract in english).

Articole publicate

Stability and bifurcations in an epidemic model with nonlinear transmission and removal rates, Carpathian Journal of Mathematics 2025, 41(2), 329-349; (with R. Efrem; D. Constantinescu) link

Local dynamics and bifurcation for a two-dimensional cubic Lotka-Volterra system (Part II), Annals of the University of Craiova-Mathematics and Computer Science Series 2024, 51(2), 561-576; (with R. Efrem) link

Stability and bifurcation analysis of a four-dimensional economic model, Carpathian Journal of Mathematics 2024, 40(1), 139-153; (with G. Moza; C. Rocșoreanu; R. Oliveira) link

Stability and Bifurcations in a Nutrient-Phytoplankton-Zooplankton Model with Delayed Nutrient Recycling with Gamma Distribution, Mathematics 2023, 11(13), Article 2911; (with C. Rocșoreanu; R. Efrem; S.A. Campbell) link

A Generalization of the Grey Lotka-Volterra Model and Application to GDP, Export, Import and Investment for the European Union, Mathematics 2023, 11(15), Article 3351; (with C. Rocșoreanu; G. Șoavă; A. Mehedințu) link

Local dynamics and bifurcation for a two-dimensional cubic Lotka-Volterra system I, Annals of the University of Craiova-Mathematics and Computer Science Series 2023, 50(1), 247-258; (with R. Efrem) link

An analysis of two degenerate double Hopf bifurcations, Electronic Research Archive 2022, 30(1), 382-403; (with G. Moza; C. Rocsoreanu) link

Analysis and Forecast of the Use of E-Commerce in Enterprises of the European Union States, Sustainability 2022, 14(14), 8943; (with G. Soava; A. Mehedintu) link

Evolution and Forecasting of the Renewable Energy Consumption in the Frame of Sustainable Development: EU vs. Romania, Sustainability 2021, 13(18), 10327; (with A. Mehedintu; G. Soava; E. Grecu) link

The Impact of the COVID-19 Pandemic on Electricity Consumption and Economic Growth in Romania, Energies 2021, 14(9), 2394; (with G. Soava; A. Mehedintu; E. Grecu) link

Impact of Employed Labor Force, Investment, and Remittances on Economic Growth in EU Countries, Sustainability 2020, 12 (23), 10141; (with G. Soava; A. Mehedintu; M. Raduteanu) link

Relations between income inequality, economic growth and poverty threshold: new evidences from EU countries panels, Technological and Economic Development of Economy, 26(1) (2020), 290-310; (with G. Soava; A. Mehedintu) link

Remittances, Migration and Gross Domestic Product from Romania’s Perspective, Sustainability, 12(1) (2020), Article Number: 212 (with A. Mehedintu; G. Soava) link

The Effect of Remittances on Poverty in the Emerging Countries of the European Union, Sustainability, 11(12) (2019), Article Number: 3265 (with A. Mehedintu; G. Soava) link

Approximations of the heteroclinic orbits near a double-zero bifurcation with symmetry of order two. Application to a Lienard equation, International Journal of Bifurcation and Chaos, 29(6) (2019), Art. 1950074 (with Carmen Rocşoreanu) preprint of the article link, Copyright World Scientific Publishing Company This research was partially supported by Horizon2020-2017-RISE-777911 project.

Homoclinic and Heteroclinic Orbits for a Liénard System, Journal of Informatics and Mathematical Sciences 10(4) (2018), 563-571; (with C. Rocşoreanu) link

Impact of Economic Growth and Energy Consumption on Greenhouse Gases Emissions: Testing Environmental Curves Hypotheses on EU Countries, Sustainability 10(9) (2018), Article Number: 3327; (with G. Soava; A. Mehedintu) link

Impact of Renewable Energy Consumption on Economic Growth: Evidence from European Union Countries, Technological and Economic Development of Economy, 24(3) (2018), 914-932; (with G. Soava; A. Mehedintu) link

Estimation and Forecasts for the Share of Renewable Energy Consumption in Final Energy Consumption by 2020 in the European Union, Sustainability 10(5) (2018), Article Number: 1515 (with A. Mehedintu; G. Soava) link

Approximations of the homoclinic orbits near a double-zero bifurcation with symmetry of order two, International Journal of Bifurcation and Chaos, 27(7) (2017), Art. 175109 (with C. Rocşoreanu) link

Second order approximations of the homoclinic solutions for the FitzHugh-Nagumo system, ROMAI Journal 2016/2, 161-172; (with C. Rocşoreanu) link

Controllable Hopf bifurcations of codimension 1 and 2 in nonlinear control systems, Nonlinear Analysis: Theory, Methods & Applications, 74 (9) (2011), p. 3046-3054. (with D. de Carvalho Braga, L. F. Mello, C. Rocsoreanu) (DOI: 10.1016/j.na.2011.01.033)

Control of planar Bautin bifurcation, Nonlinear Dynamics, vol 62 (4) (2010), p. 989-1000 (with D. de Carvalho Braga, L. F. Mello, C. Rocsoreanu) (DOI: 10.1007/s11071-010-9779-2)

Lyapunov coefficients for non-symmetrically coupled identical dynamical systems. Application to coupled advertising models, Discrete and Continuous Dynamical Systems - Series B, Vol. 11 (2009), Issue 3, p. 785-803. (with C. Rocsoreanu, L. F. Mello and D. Braga) (DOI: 10.3934/dcdsb.2009.11.785)

Bifurcation in a nonlinear business cycle model, ROMAI Journal 2009/2, p. 145-152 (with Carmen Rocsoreanu)

Approximate limit cycles for the Rayleigh model, ROMAI Journal, vol. 4, nr. 2, 2008, p. 73-80. (with A. Georgescu and P. Bazavan)

Stability and Hopf bifurcation for Two Advertising Systems, Coupled with Delay, in: Numerical Analysis and Applied Mathematics,International Conference on Numerical Analysis and Applied Mathematics, Corfu, Greece, September 2007, AIP Conference Proceedings 936, Amer. Inst. Phys., Melville, NY, 2007 (editor: Th. Simos), pp. 535-538. ISBN 978-0-7354-0447-2; ISSN 0094-243X. (with C. Rocsoreanu)

Algorithms for optimally computing in-line visibility and their applications, Analele Universitatii A.I. Cuza Iasi, Seria Informatica, 29(17), vol. XVI (2006), p. 39-50. (with M. Cosulschi)

First Liapunov coefficient for coupled identical oscillators. Application to coupled demand-supply model, Mathematical Methods in Applied Sciences, 29(17), (2006), p. 2037-2046. (with C. Rocsoreanu) (DOI: 10.1002/mma.762)

Hopf bifurcation in coupled oscillators, In: MATHEMATICAL ANALYSIS AND APPLICATIONS: International Conference on Mathematical Analysis and Applications, Craiova (Romania) 2005, American Institute of Physics Conference Volume 835, (editors: V. Rădulescu, C.P. Niculescu), (2006), p. 133-142. (with C. Rocsoreanu).

Hopf bifurcation in a system of two coupled advertising oscillators, Nonlinear Analysis: Real World Applications, Elsevier, 6 (2005), no. 1, p. 1-12. (with C. Rocsoreanu) (DOI: 10.1016/j.nonrwa.2004.07.003)

Stability and fold bifurcation in a system of two coupled demand-supply models, Bulletin of Academy of Sciences of Moldova, Matematica, 3(46), (2004), p. 53-62. (with C. Rocsoreanu)

Local bifurcations in the FitzHugh-Nagumo system, Analysis and Optimisation in Differential Systems, Kluwer Acad. Publ., 2003, p. 345-356. (with C. Rocsoreanu)

Two approximations of homoclinic bifurcation curves in the FitzHugh-Nagumo system, Annals of University of Craiova, Math.Comp.Sci.Ser., 30 (2003), no. 2, p. 166-174. (with C. Rocsoreanu)

Nonhyperbolic singularities in a system of two coupled ocillators Proc. of the 11th Conf. on Appl. Ind. Math., 2003, Oradea, p. 195-201.(with C. Rocsoreanu)

Two approximations of homoclinic bifurcation curves in the FitzHugh-Nagumo system, Annals of University of Craiova, Math.Comp.Sci.Ser., 30 (2003), no. 2, p. 166-174. (with C. Rocsoreanu)

Saddle-node bifurcations for the FitzHugh-Nagumo model, Math. Rep., Acad. Rom., 4(54), 3 (2002), p. 273-280.

Codimension one bifurcations for a Rayleigh model, Bull. Academy of Science of Rep. Moldova, Mathematica, 1(38), (2002), p. 69-76. (with A. Georgescu)

A double-zero with symmetry of order two bifurcation in the FitzHugh-Nagumo model, Ann. University of Craiova, Mathematics-Informatics Series, XXIX (2002), p. 130-136.

Dynamics generated by the generalized Rayleigh equation I. The unforced case, An. Univ. de Vest Timisoara, Seria Mat.-Inf., 39, 2(2001), p. 147-154.

Codimension three bifurcations for the FitzHugh-Nagumo system, Math. Rep., Acad. Rom., 3(53), 3 (2001), p. 287-292. (with A. Georgescu).

Computational methods to construct juxtaposition fractals, An. Univ. de Vest Timisoara, Seria Mat.-Inf., 39, 1 (2001), 157-170.

Codimension three bifurcations for a FitzHugh-Nagumo like system, Bul. St. Univ. Pitesti, seria Mat.-Inf., 4 (2000), p. 193-197, (with A. Georgescu).

Period doubling bifurcations for a periodically forced Rayleigh equation, Bul. St. Univ. Pitesti, seria Mat.-Inf., 4 (2000), p. 187-191, (with P. Bazavan).

Dynamics generated by the generalized Rayleigh equation II. Periodic solutions, Math. Rep., Acad. Rom., 2(52), 3 (2000), p. 367-378, (with A. Georgescu, P. Bazavan).

Dynamics and Bifurcations in the Periodically Forced FitzHugh-Nagumo System, Int. J. Chaos Theory and Applications, 5, 2 (2000), p. 63-80, (with A. Georgescu).

A numerical convexity invariant for plane domains, An. Univ. Craiova, Seria Mat.-Inf., XXV (1998), p. 87-92, (with P. Bazavan).

Study on a Rayleigh equation, Bul. St. Univ. Pitesti, seria Mat.-Inf., 3 (1999), 429--434, (with P. Bazavan).

Regression with a unit-vector type function on a Riemann space, An. Univ. Craiova, Seria Mat.-Inf., XXIV (1997), p. 127-136.

A comparative analysis of Monte Carlo estimations of areas and volumes for free boundary domains, Proc. of the Eight Int. Symp. on Appl. Stoch. Models and Data Analysis (ASMDA '97), Anacapri/Napoli, Italy, 11 - 14 June 1997 (Eds. J. Janssen, C. Lauro), vol. 8, p. 193-198, (1997), (with F. Gorunescu, M. Gorunescu).

Note on a test involving repeated trials for the hit or miss Monte Carlo integration, An. Univ. Craiova, Seria Mat.-Inf., vol. XXI, p. 42-50, (1994), (with F. Gorunescu, M. Gorunescu).

Hit or miss Monte Carlo simulation for improper integrals, An. Univ. Craiova, Seria Mat.-Inf., vol. XX, p. 22–26, (1993), (with F. Gorunescu, M. Gorunescu).

Stagii la universităţi din ţară şi din străinătate pe probleme de învăţământ şi cercetare

Stagii în cadrul proiectului HORIZON-MSCA-2023-SE-101183111 "Dynamical Systems and Reaction Kinetics Networks", la:
Shanghai Jiao Tong University, Shanghai, P.R. China: septembrie-octombrie 2025.

Stagii în cadrul proiectului HORIZON2020-MSCA-RISE-2017-777911, "Dynamics" la:
University of Sao Paulo (at Sao Carlos), Brazil: februarie-martie 2023;
University of Waterloo, Ontario, Canada: august-septembrie 2022;
University of Bio-Bio, Conception, Chile: februarie-aprilie 2022;
Austrian Center for Medical Inovation and Technology (ACMIT), Wiener Neustadt, Austria: iulie-august 2018, iulie-august 2019, august 2023.

Burse de mobilitate Erasmus, la Université Paris XII, Val de Marne, în februarie 2006, aprilie 2007, mai 2008, mai 2009 (Faculté des Sciences et Technologie, Laboratoire d'Algorithmique, Complexité et Logique).
Stagiu de pregătire a metodiştilor universitari, 25 noiembrie - 2 decembrie 2001, organizat de MEC (Proiectul de reformă a învăţământului preuniversitar) şi de College of Education, ITS Educational Technology University of Northern Iowa, SUA.

Seminarii ştiinţifice la care am participat

2006: Analiză şi control în sisteme diferenţiale, Facultatea de Matematică-Informatică, Universitatea din Craiova. Coordonatori: Prof. Dr. Sorin Micu, Prof. Dr. Constantin P. Niculescu, Prof. Dr. Vicenţiu Rădulescu.
2004-2005: Analiză matematică şi aplicaţii, Facultatea de Matematică-Informatică, Universitatea din Craiova. Coordonator: Prof. Dr. Constantin P. Niculescu.
1998-2000: Seminarul de cercetare ştiinţifică Victor Vâlcovici, Facultatea de Ştiinţe, Universitatea din Piteşti. Coordonator: Prof. Dr. Adelina Georgescu.
1994-1996: Seminarul de Geometrie diferenţială, combinatorică şi computaţională şi Topologie, Facultatea de Matematică-Informatică, Universitatea din Craiova. Coordonator: Prof. Dr. Valentin Boju.

Comunicări prezentate la manifestări ştiinţifice

Bifurcation Diagrams for a Cubic Kolmogorov System, Dynamical Systems and Applications, The First Workshop within the DSYREKI Project, 27-28 June, 2025, University of Maribor, Slovenia. (with C. Rocșoreanu, R. Efrem)

Some nongeneric double-Hopf bifurcations, Dynamical Systems, Reaction Kinetics and Applications, The Second Workshop within the DSYREKI Project, 2-5 July, 2025, University of Zageb, Croația. (with R. Efrem)

Local dynamics in a closed ecosystem model, The 5th Edition of the International Conference on Applied Mathematics and Numerical Methods - ICAMNM 2024, 25-26 oct. 2024, Craiova. (with C. Rocșoreanu, R. Efrem)

Application of a generalization of the Grey Lotka-Volterra model to an economic model, The 31th Edition of the Annual Conference on Applied and Industrial Mathematics- CAIM 2024, 14-17 sept. 2024, Oradea. (with C. Rocșoreanu)

Local Stability in a SEIR Type Epidemic Model, The 31th Edition of the Annual Conference on Applied and Industrial Mathematics- CAIM 2024, 14-17 sept. 2024, Oradea. (with r. Efrem, D. Constantinescu)

Stability and bifurcations in a model from ecology, The 30th Edition of the Annual Conference on Applied and Industrial Mathematics- CAIM 2023, 14-17 sept. 2023, Iași. (with R. Efrem, C. Rocșoreanu)

Study of a 3D system modeling tumor immunotherapy, The 4th Edition of the International Conference on Applied Mathematics and Numerical Methods - ICAMNM 2022, 29 iunie-1 iulie 2022, Craiova. (with C. Rocșoreanu)

Control of an economic dynamical system, The 3th Edition of the International Conference on Applied Mathematics and Numerical Methods - ICAMNM 2020, 29-31 oct. 2020, Craiova. (with C. Rocșoreanu)

Some types of behavior for a degenerate double Hopf bifurcation, The 27th Edition of the Annual Conference on Applied and Industrial Mathematics- CAIM 2019, 19-22 sept. 2019, Târgoviște. (with C. Rocșoreanu)

Homoclinic and heteroclinic orbits for a Liénard system, 5th International Congress on Fundamental and Applied Sciences, June 18-22, 2018, Skopje, Macedonia. (with C. Rocșoreanu)

Heteroclinic orbits corresponding to a double-zero bifurcation with symmetry of order two, The 25th Edition of the Annual Conference on Applied and Industrial Mathematics- CAIM 2017, 21-24 sept. 2017, Iaşi. (with C. Rocșoreanu)

Second order approximations of the homoclinic solutions for the FitzHugh-Nagumo system, The 24th Edition of the Annual Conference on Applied and Industrial Mathematics- CAIM 2016, 15-18 sept. 2016, Craiova. (with C. Rocșoreanu)

Approximations of the homoclinic solutions for the FitzHugh-Nagumo system, The 23th Edition of the Annual Conference on Applied and Industrial Mathematics- CAIM 2015, 17-23 sept. 2015, Suceava. (with C. Rocșoreanu)

Control of Hopf bifurcation control in finite dimensional dynamical systems, The 19th Conference on Applied and Industrial Mathematics, CAIM 2011, Iaşi. (with C. Rocșoreanu)

Bautin bifurcation control in a planar system, The 17th Conference on Applied and Industrial Mathematics, CAIM 2009, Constanta. (with C. Rocsoreanu)

Hopf bifurcation in a business model with time delay, The 16th Conference on Applied and Industrial Mathematics, CAIM 2008, Oradea. (with C. Rocsoreanu)

Stability and Hopf bifurcation in a nonlinear IS-LM model with time delay. Applications, The International Conference of Differential Geometry and Dynamical Systems DGDS 2008, Mangalia, 29 august-2 septembrie 2008. (with C. Rocsoreanu)

Hopf bifurcation for coupled identical dynamical systems. Applications, 6-th International Congress of Romanian Mathematicians, Bucuresti, June 28-July 4, 2007. (with C. Rocsoreanu)

Stability and Hopf Bifurcations for Two Advertising Systems, Coupled with Delay, International Conference on Nonlinear Analysis and Applied Mathematics, Grecia, September 16-20, 2007. (with C. Rocsoreanu)

Fold and Hopf bifurcations in non-symmetrically coupled dynamical systems, The 14th Conference On Applied and Industrial Mathematics, CAIM 2006, Universitatea din Stat din Chisinau, Rep. Moldova, August 17-19, 2006. (with C. Rocsoreanu)

Liapunov coefficients in non-symmetrically coupled systems, International Conference On Applied Analysis and Differential Equations, Universitatea din Iasi, September 4 -9, 2006. (with C. Rocsoreanu)

Center manifold for coupled Hopf oscillators, The 13th Conference On Applied and Industrial Mathematics, CAIM 2005, University of Pitesti, October 14-16, 2005; (with C. Rocsoreanu)

Bifurcation for coupled Hopf oscillators, 7th Conference on Nonlinear Analysis and Applications, September 23-24, 2005, University of Craiova; (with C. Rocsoreanu)

An alternate proof for the Bogdanov-Takens for a demand-supply model, The 12th Conference On Applied and Industrial Mathematics, CAIM 2004, University of Pitesti, October 15-17, 2004

Nonhyperbolic singularities in a system of two coupled offer - request models, Second Conference of the Mathematical Society of Moldavia, Chisinau, Rep. Moldova, August 17-19, 2004; (with C. Rocsoreanu)

Bifurcation in a system of two coupled offer - request models, 7e Colloque Franco-Roumain de Mathematiques Appliquees, University of Craiova, September 1-4, 2004; (with C. Rocsoreanu)

Nonhyperbolic singularities in a system of coupled oscillators The 11th Conference On Applied and Industrial Mathematics, CAIM 2003, University of Oradea, Romania, May 29-31, 2003; (with C. Rocsoreanu)

An overview on dynamic bifurcations in the FitzHugh-Nagumo System Int. Conference on Analysis and Optimisation of Differential Systems, "Ovidius" University, Constanta, Romania, September 10-14, 2002; (with C. Rocsoreanu)

Two approximations of homoclinic bifurcation curves for the FitzHugh-Nagumo system The 10th Conference On Applied and Industrial Mathematics, CAIM 2001, University of Pitesti, Romania, October 12-14, 2002; (with C. Rocsoreanu).

Codimension one bifurcations for the periodically forced Rayleigh model First Conference of the Mathematical Society of Moldavia, Chisinau, Rep. Moldavia, August 16-18, 2001; (with A. Georgescu).

On a cusp bifurcation in the FitzHugh-Nagumo model Fifth national Conf. on Mathematical Analysis and Applications V-a , University of Craiova, Romania, November 2-3, 2001

Alternance between periodic and chaotic attractors in a Rayleigh model The 9th Conference On Applied and Industrial Mathematics, CAIM 2001, University of Pitesti, Romania, October 12-14, 2001; (with P. Bazavan)

Approximate limit cycles for the Rayleigh model The 8th Conference on Applied and Industrial Mathematics, CAIM 2000, University of Pitesti, Romania, October 13-15, 2000; (with A. Georgescu, P. Bazavan)

Some bifurcations for the forced Rayleigh equation The 7th Conference on Applied and Industrial Mathematics, CAIM 99, University of Pitesti, Romania, October 15-17, 1999;(with P. Bazavan).

Codimension three bifurcations for a FitzHugh-Nagumo like model The 7th Conference on Applied and Industrial Mathematics, CAIM 99, University of Pitesti, Romania, October 15-17, 1999; (with A. Georgescu).

Hit or miss Monte Carlo simulation for evaluating the fractal dimension Annual Scientific Conference GAMM 98, University of Bremen, 1998, (with P. Bazavan).

Study on a Rayleigh equation" The 6th Conf. on Applied and Industrial Mathematics, CAIM 98, University of Pitesti, Romania, October 16-18, 1998,(with P. Bazavan)

A comparative analysis of Monte Carlo estimations of areas and volumes for free boundary domains Eight International Symposium on Applied Stochastic Models and Data Analysis (ASMDA '97), Anacapri/Napoli, Italy, 11 - 14 June 1997, (with F. Gorunescu, M. Gorunescu).

Pattern Convex Improvement, Fifth SIAM Conference on Optimisation, Victoria, British Columbia, Canada, may 1996, (with V. Boju).

A Computational Approach on TVF-Regression Riemannian Submanifolds Fifth SIAM Conference on Optimisation, Victoria, British Columbia, Canada, May 1996, (with V. Boju)