Geometric and algebraic classification of quadratic differential systems with invariant hyperbolas
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OLIVEIRA, Regilene D. S., REZENDE, Alex Carlucci, SCHLOMIUK, Dana, VULPE, Nicolae. Geometric and algebraic classification of quadratic differential systems with invariant hyperbolas. In: Electronic Journal of Differential Equations, 2017, vol. 2017, p. 0. ISSN 1072-6691.
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Electronic Journal of Differential Equations
Volumul 2017 / 2017 / ISSN 1072-6691 /ISSNe 1550-6150

Geometric and algebraic classification of quadratic differential systems with invariant hyperbolas


Pag. 0-0

Oliveira Regilene D. S.1, Rezende Alex Carlucci2, Schlomiuk Dana3, Vulpe Nicolae4
 
1 Universidade Federal de Sao Paulo,
2 Universidade Federal de Santa Maria,
3 Université de Montréal,
4 Institute of Mathematics and Computer Science ASM
 
Proiecte:
 
Disponibil în IBN: 5 septembrie 2018


Rezumat

Let QSH be the whole class of non-degenerate planar quadratic differential systems possessing at least one invariant hyperbola. We classify this family of systems, modulo the action of the group of real affine transformations and time rescaling, according to their geometric properties encoded in the configurations of invariant hyperbolas and invariant straight lines which these systems possess. The classification is given both in terms of algebraic geometric invariants and also in terms of affine invariant polynomials. It yields a total of 205 distinct such configurations. We have 162 configurations for the subclass QSH(η>0) of systems which possess three distinct real singularities at infinity in P2(ℂ), and 43 configurations for the subclass QSH(η=0)of systems which possess either exactly two distinct real singularities at infinity or the line at infinity filled up with singularities. The algebraic classification, based on the invariant polynomials, is also an algorithm which makes it possible to verify for any given real quadratic differential system if it has invariant hyperbolas or not and to specify its configuration of invariant hyperbolas and straight lines.

Cuvinte-cheie
affine invariant polynomials, Algebraic solution, Configuration of algebraic solutions, Group action, Quadratic differential systems