We give some properties of the saddle conic of quadratic differential systems. We also deduce semi-algebraic conditions for the existence of one, two or three saddle points (in terms of affine invariants).
Publié le : 2000-07-04
Classification:
Qualitative theory of differential equations,
saddle,
node,
[MATH]Mathematics [math]
@article{hal-01315675,
author = {Boularas, Driss},
title = {A note on the saddle conic of quadratic planar differential systems},
journal = {HAL},
volume = {2000},
number = {0},
year = {2000},
language = {en},
url = {http://dml.mathdoc.fr/item/hal-01315675}
}
Boularas, Driss. A note on the saddle conic of quadratic planar differential systems. HAL, Tome 2000 (2000) no. 0, . http://gdmltest.u-ga.fr/item/hal-01315675/