Limit Cycles of Differential Equations

Colin Christopher is Associate Head of School at the University of Plymouth in Devon, UK.Chengzhi Li is Professor Emeritus at the Peking University in China.Joan Torregrosa is Associate Professor at the Universitat Autònoma de Barcelona in Bellaterra, Spain.

• Part I: Around the Center-Focus Problem.- 1 Centers and Limit Cycles.- 2 Darboux Integrability.- 3 Liouvillian Integrability.- 4 Symmetry.- 5 Cherkas’ Systems.- 6 Monodromy.- 7 The Tangential Center-Focus Problem.- 8 Monodromy of Hyperelliptic Abelian Integrals.- 9 Holonomy and the Lotka-Volterra System.- 10 Other Approaches.- Part II: Abelian Integrals and Applications to the Weak Hilbert’s 16th Problem.- 1 Hilbert’s 16th Problem and Its Weak Form.- 2 Abelian Integrals and Limit Cycles.- 3 Estimate of the Number of Zeros of Abelian Integrals.- 4 A Unified Proof of the Weak Hilbert’s 16th Problem for n=2.