Periodic solutions of singular second order differential equations: Upper and lower functions

By Robert Hakl, Pedro J. Torres, M. Zamora. 2011

64 citations recorded by the source corpus.

Subfields: Geometry and Topology, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/5ff36271b0a1b72c4c2663e9224328cf8ca91706