| Affine-invariant conditions for topological distinction of quadratic systems in the presence of a center NI Vulpe Differentsial'nye Uravneniya 19 (3), 371-379, 1983 | 108 | 1983 |
| Polynomial bases of comitants of differential systems and their applications in qualitative theory NI Vulpe Shtiintsa”, Kishinev, 1986 | 100 | 1986 |
| Geometry of quadratic differential systems in the neighborhood of infinity D Schlomiuk, N Vulpe Journal of Differential Equations 215 (2), 357-400, 2005 | 96 | 2005 |
| Planar cubic polynomial differential systems with the maximum number of invariant straight lines J Llibre, N Vulpe The Rocky Mountain Journal of Mathematics, 1301-1373, 2006 | 80 | 2006 |
| Integrals and phase portraits of planar quadratic differential systems with invariant lines of at least five total multiplicity D Schlomiuk, N Vulpe The Rocky Mountain Journal of Mathematics, 2015-2075, 2008 | 78 | 2008 |
| The full study of planar quadratic differential systems possessing a line of singularities at infinity D Schlomiuk, N Vulpe Journal of Dynamics and Differential Equations 20, 737-775, 2008 | 76 | 2008 |
| Planar quadratic differential systems with invariant straight lines of total multiplicity four D Schlomiuk, N Vulpe Nonlinear Analysis: Theory, Methods & Applications 68 (4), 681-715, 2008 | 68 | 2008 |
| Integrals and phase portraits of planar quadratic differential systems with invariant lines of total multiplicity four D Schlomiuk, N Vulpe Buletinul Academiei de Ştiinţe a Moldovei. Matematica 56 (1), 27-83, 2008 | 65 | 2008 |
| Total multiplicity of all finite critical points of the polynomial differential system, Planar nonlinear dynamical systems (Delft, 1995) VA Baltag, NI Vulpe Differential Equations & Dynam. Systems 5, 455-471, 1997 | 65 | 1997 |
| Global classification of the planar Lotka–Volterra differential systems according to their configurations of invariant straight lines D Schlomiuk, N Vulpe Journal of Fixed Point Theory and Applications 8 (1), 177-245, 2010 | 62 | 2010 |
| Centro-affine invariant conditions for the existence of a center of a differential system with cubic nonlinearities NI Vulpe, KS Sibirskii Doklady Akademii Nauk 301 (6), 1297-1301, 1988 | 60 | 1988 |
| Planar quadratic differential systems with invariant straight lines of at least five total multiplicity D Schlomiuk, N Vulpe Qualitative Theory of Dynamical Systems 5, 135-194, 2004 | 58 | 2004 |
| Global topological classification of Lotka–Volterra quadratic differential systems D Schlomiuk, N Vulpe Electron. J. Differential Equations 64 (2012), 69, 2012 | 53 | 2012 |
| SINGULAR POINTS OF QUADRATIC SYSTEMS: A COMPLETE CLASSIFICATION IN THE COEFFICIENT SPACE ℝ12 JC Artes, J Llibre, N Vulpe International Journal of Bifurcation and Chaos 18 (02), 313-362, 2008 | 53 | 2008 |
| From topological to geometric equivalence in the classification of singularities at infinity for quadratic vector fields JC Artes, J Llibre, D Schlomiuk, N Vulpe | 42 | 2015 |
| Characterization of the finite weak singularities of quadratic systems via invariant theory N Vulpe Nonlinear Analysis: Theory, Methods & Applications 74 (17), 6553-6582, 2011 | 42 | 2011 |
| Cubic differential systems with invariant straight lines of total multiplicity eight and four distinct infinite singularities C Bujac, N Vulpe Journal of Mathematical Analysis and Applications 423 (2), 1025-1080, 2015 | 40 | 2015 |
| Topological classification of quadratic systems at infinity I Nikolaev, N Vulpe Journal of the London Mathematical Society 55 (3), 473-488, 1997 | 40 | 1997 |
| Complete geometric invariant study of two classes of quadratic systems JC Artes, J Llibre, N Vulpe Electron. J. Differential Equations 9 (2012), 1-35, 2012 | 39 | 2012 |
| Planar quadratic vector fields with invariant lines of total multiplicity at least five D Schlomiuk, N Vulpe Qualitative Theory of Dynamical Systems 5, 135-194, 2004 | 39 | 2004 |
Jaume LlibreProfessor at Universitat Autònoma de BarcelonaVerified email at mat.uab.cat
