Criteria for the nonexistence of periodic orbits in planar differential systems Jaume Giné and Jaume Llibre | pp.3-7 |
Some families of quadratic systems with at most one limit cycle Jaume Llibre | pp.8-15 |
Time-Reversibility and Ivariants of Some 3-dim Systems Tatjana Petek and Valery G. Romanovski | pp.16-28 |
A survey on local integrability and its regularity Yantao Yang and Xiang Zhang | pp.29-41 |
The bifurcation diagram of the configurations of invariant lines of total multiplicity exactly three in quadratic vector fields Bujac Cristina, Schlomiuk D., Vulpe Nicolae | pp.42-77 |
Counting configurations of limit cycles and centers Armengol Gasull, Antoni Guillamon and Victor Manosa | pp.78-96 |