TY  - JOUR 
AU  - Bravo, José Luis
AU  - Fernández, Manuel
AU  - Ojeda, Ignacio
AU  - Sánchez, Fernándo
PY  - 2019
SN  - 1553-5231
UR  - http://uvadoc.uva.es/handle/10324/40727
AB  - This article deals with the study of the number of limit
cycles surrounding a critical point of a quadratic planar vector field,
which, in normal form, can be written as x
′ = a1x − y − a3x
2 + (2a2 +
a5)xy+a6y
2
, y
′ =...
LA  - eng
PB  - American Institute of Mathematical Sciences
KW  - Abel equation
KW  - Ecuación de Abel
KW  - Closed solution
KW  - Solución en forma cerrada
KW  - Periodic solution
KW  - Solución periódica
KW  - Limit cycles
KW  - Ciclos límite
TI  - Uniqueness of limit cycles for quadratic vector fields
DO  - 10.3934/dcds.2019020
ER  -