Nicolae Vulpe

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Person:450583

Available identifiers

zbMath Open vulpe.nicolae-iMaRDI QIDQ450583

List of research outcomes

PublicationDate of PublicationType
The bifurcation diagram of the configurations of invariant lines of total multiplicity exactly three in quadratic vector fields2023-11-16Paper
The family of cubic differential systems with two real and two complex distinct infinite singularities and invariant straight lines of the type <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns="http://www.w3.org/1998/Math/MathML"> <mml:mo stretchy="false">(</mml:mo> <mml:mn>3</mml:mn> <mml:mo>,</mml:mo> <mml:mn>1</mml:mn> <mml:mo>,</mml:mo> <mml:mn>1</mml:mn> <mml:mo>,</mml:mo> <mml:mn>1</mml:mn> <mml:mo stretchy="false">)</mml:mo> </mml:math>2023-09-26Paper
On families \(\boldsymbol{QSL}_{\geq 2}\) of quadratic systems with invariant lines of total multiplicity at least 22022-10-07Paper
https://portal.mardi4nfdi.de/entity/Q51014802022-08-30Paper
Geometric analysis of quadratic differential systems with invariant ellipses2022-07-20Paper
Characterization and bifurcation diagram of the family of quadratic differential systems with an invariant ellipse in terms of invariant polynomials2022-05-25Paper
Invariant conditions for phase portraits of quadratic systems with complex conjugate invariant lines meeting at a finite point2021-08-20Paper
Geometric Configurations of Singularities of Planar Polynomial Differential Systems2021-07-20Paper
https://portal.mardi4nfdi.de/entity/Q58571882021-03-30Paper
Global topological configurations of singularities for the whole family of quadratic differential systems2020-02-25Paper
First integrals and phase portraits of planar polynomial differential cubic systems with invariant straight lines of total multiplicity eight2018-09-03Paper
Cubic differential systems with invariant straight lines of total multiplicity eight possessing one infinite singularity2018-04-03Paper
https://portal.mardi4nfdi.de/entity/Q45972802017-12-12Paper
First integrals and phase portraits of planar polynomial differential cubic systems with the maximum number of invariant straight lines2017-06-09Paper
https://portal.mardi4nfdi.de/entity/Q57415412016-07-25Paper
Global configurations of singularities for quadratic differential systems with exactly three finite singularities of total multiplicity four2016-05-03Paper
Classification of cubic differential systems with invariant straight lines of total multiplicity eight and two distinct infinite singularities2016-05-03Paper
https://portal.mardi4nfdi.de/entity/Q34647972016-01-27Paper
https://portal.mardi4nfdi.de/entity/Q34648062016-01-27Paper
https://portal.mardi4nfdi.de/entity/Q34648182016-01-27Paper
Bifurcation Diagrams and Quotient Topological Spaces Under the Action of the Affine Group of a Family of Planar Quadratic Vector Fields2015-12-17Paper
Global configurations of singularities for quadratic differential systems with exactly two finite singularities of total multiplicity four2015-05-22Paper
Cubic systems with invariant straight lines of total multiplicity eight and with three distinct infinite singularities2015-04-29Paper
From topological to geometric equivalence in the classification of singularities at infinity for quadratic vector fields2015-04-21Paper
Invariants and symbolic calculations in the theory of quadratic differential systems2015-02-20Paper
Global configurations of singularities for quadratic differential systems with total finite multiplicity three and at most two real singularities2015-01-27Paper
Cubic differential systems with invariant straight lines of total multiplicity eight and four distinct infinite singularities2014-11-19Paper
Geometric configurations of singularities for quadratic differential systems with three distinct real simple finite singularities2014-09-26Paper
https://portal.mardi4nfdi.de/entity/Q28776462014-08-25Paper
Applications of Symbolic Calculations and Polynomial Invariants to the Classification of Singularities of Differential Systems2014-07-07Paper
https://portal.mardi4nfdi.de/entity/Q28738252014-01-27Paper
https://portal.mardi4nfdi.de/entity/Q31650132012-10-25Paper
Quadratic systems with an integrable saddle: a complete classification in the coefficient space \(\mathbb R^{12}\)2012-09-13Paper
https://portal.mardi4nfdi.de/entity/Q53901132012-04-27Paper
Phase portraits and invariant straight lines of cubic polynomial vector fields having a quadratic rational first integral2011-10-18Paper
Characterization of the finite weak singularities of quadratic systems via invariant theory2011-10-17Paper
Global classification of the planar Lotka-Volterra differential systems according to their configurations of invariant straight lines2011-02-18Paper
Quadratic systems with a rational first integral of degree three: a complete classification in the coefficient space \(\mathbb R^{12}\)2011-01-25Paper
Bifurcation diagrams and moduli spaces of planar quadratic vector fields with invariant lines of total multiplicity four and having exactly three real singularities at infinity2010-12-14Paper
https://portal.mardi4nfdi.de/entity/Q36306442009-06-04Paper
Quadratic systems with a polynomial first integral: A complete classification in the coefficient space \(\mathbb R^{12}\)2009-05-19Paper
Integrals and phase portraits of planar quadratic differential systems with invariant lines of at least five total multiplicity2009-04-07Paper
The full study of planar quadratic differential systems possessing a line of singularities at infinity2008-12-01Paper
https://portal.mardi4nfdi.de/entity/Q35425042008-12-01Paper
SINGULAR POINTS OF QUADRATIC SYSTEMS: A COMPLETE CLASSIFICATION IN THE COEFFICIENT SPACE ℝ122008-08-26Paper
Planar cubic polynomial differential systems with the maximum number of invariant straight lines2008-03-14Paper
Planar quadratic differential systems with invariant straight lines of total multiplicity four2008-02-13Paper
Quadratic system with a rational first integral of degree 2: a complete classification in the coefficient space \(\mathbb{R}^{12}\)2008-01-29Paper
https://portal.mardi4nfdi.de/entity/Q52973142007-07-18Paper
https://portal.mardi4nfdi.de/entity/Q52973172007-07-18Paper
https://portal.mardi4nfdi.de/entity/Q52973302007-07-18Paper
https://portal.mardi4nfdi.de/entity/Q52973532007-07-18Paper
Planar quadratic vector fields with invariant lines of total multiplicity at least five2006-05-19Paper
Geometry of quadratic differential systems in the neighborhood of infinity2005-08-01Paper
https://portal.mardi4nfdi.de/entity/Q48128582004-08-23Paper
https://portal.mardi4nfdi.de/entity/Q45461322002-08-18Paper
https://portal.mardi4nfdi.de/entity/Q45461462002-08-18Paper
Total multiplicity of all finite critical points of the polynomial differential system2000-08-14Paper
https://portal.mardi4nfdi.de/entity/Q42350911999-05-02Paper
Affine invariant conditions for topologically distinguishing quadratic systems with mf = 11999-04-08Paper
https://portal.mardi4nfdi.de/entity/Q43867531999-02-18Paper
https://portal.mardi4nfdi.de/entity/Q43835381998-04-27Paper
https://portal.mardi4nfdi.de/entity/Q43835481998-04-26Paper
https://portal.mardi4nfdi.de/entity/Q43835901998-04-07Paper
Affine invariant conditions for the topological distinction of quadratic systems with a critical point of the multiplicity 41997-10-12Paper
Topological Classification of Quadratic Systems at Infinity1996-12-12Paper
https://portal.mardi4nfdi.de/entity/Q47139681996-10-29Paper
https://portal.mardi4nfdi.de/entity/Q48714071996-07-15Paper
https://portal.mardi4nfdi.de/entity/Q48714131996-03-31Paper
https://portal.mardi4nfdi.de/entity/Q43131541994-12-05Paper
https://portal.mardi4nfdi.de/entity/Q42784701994-03-07Paper
https://portal.mardi4nfdi.de/entity/Q47138461992-06-25Paper
https://portal.mardi4nfdi.de/entity/Q57584961991-01-01Paper
https://portal.mardi4nfdi.de/entity/Q31993761990-01-01Paper
https://portal.mardi4nfdi.de/entity/Q33590731990-01-01Paper
https://portal.mardi4nfdi.de/entity/Q34746271990-01-01Paper
https://portal.mardi4nfdi.de/entity/Q31998021989-01-01Paper
https://portal.mardi4nfdi.de/entity/Q34734171989-01-01Paper
https://portal.mardi4nfdi.de/entity/Q38283141989-01-01Paper
https://portal.mardi4nfdi.de/entity/Q38163371988-01-01Paper
https://portal.mardi4nfdi.de/entity/Q37741811987-01-01Paper
https://portal.mardi4nfdi.de/entity/Q37844161986-01-01Paper
https://portal.mardi4nfdi.de/entity/Q33411871984-01-01Paper
https://portal.mardi4nfdi.de/entity/Q32208991983-01-01Paper
https://portal.mardi4nfdi.de/entity/Q36601221983-01-01Paper
https://portal.mardi4nfdi.de/entity/Q36870101983-01-01Paper
https://portal.mardi4nfdi.de/entity/Q37059241983-01-01Paper
https://portal.mardi4nfdi.de/entity/Q30397131982-01-01Paper
https://portal.mardi4nfdi.de/entity/Q39648961982-01-01Paper
https://portal.mardi4nfdi.de/entity/Q38748931980-01-01Paper
https://portal.mardi4nfdi.de/entity/Q38881101980-01-01Paper
https://portal.mardi4nfdi.de/entity/Q38973361980-01-01Paper
https://portal.mardi4nfdi.de/entity/Q38988191980-01-01Paper
https://portal.mardi4nfdi.de/entity/Q39245121980-01-01Paper
https://portal.mardi4nfdi.de/entity/Q38727951979-01-01Paper
https://portal.mardi4nfdi.de/entity/Q38844321979-01-01Paper
https://portal.mardi4nfdi.de/entity/Q42011111979-01-01Paper
https://portal.mardi4nfdi.de/entity/Q41358691977-01-01Paper
https://portal.mardi4nfdi.de/entity/Q41358921977-01-01Paper
https://portal.mardi4nfdi.de/entity/Q41792461977-01-01Paper
https://portal.mardi4nfdi.de/entity/Q40860601976-01-01Paper
https://portal.mardi4nfdi.de/entity/Q41042311976-01-01Paper
https://portal.mardi4nfdi.de/entity/Q40690341975-01-01Paper
https://portal.mardi4nfdi.de/entity/Q41236251975-01-01Paper
https://portal.mardi4nfdi.de/entity/Q40539591974-01-01Paper

Research outcomes over time


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This page was built for person: Nicolae Vulpe