Weierstrass integrability in Liénard differential systems

Abstract

In this work we study the Liénard differential systems that admit a Weierstrass first integral or a Weierstrass inverse integrating factor

The first author is partially supported by a MCYT/FEDER grant number MTM2008-00694 and by a CIRIT grant number 2009SGR 381. The second author is partially supported by a MCYT/FEDER grant number MTM2008-03437, by a CIRIT grant number 2009SGR 410 and by ICREA Academia.