2009/09/01 by Jaume Giné, Giné, Jaume, Maite Grau +1
Mathematics · #34C05 #34C23 #37G15 #Dynamical Systems (math.DS) #FOS: Mathematics #math.DS #msc:34C05 #msc:34C23 #msc:37G15
paper · pdf · doi:10.48550/arxiv.0909.0113
6 pages, no figures
arxiv created 2009/09/01 · arxiv updated 2009/12/01
The integrability problem consists in finding the class of functions a first integral of a given planar polynomial differential system must belong to. We recall the characterization of systems which admit an elementary or Liouvillian first integral. We define \it Weierstrass integrability and we determine which Weierstrass integrable systems are Liouvillian integrable. Inside this new class of integrable systems there are non--Liouvillian integrable systems.