Ding, Tongren Some fixed point theorems and periodically perturbed nondissipative systems. (English) Zbl 0484.34025 Chin. Ann. Math. 2, 281-300 (1981). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 6 Documents MSC: 34C15 Nonlinear oscillations and coupled oscillators for ordinary differential equations 34C25 Periodic solutions to ordinary differential equations 47H10 Fixed-point theorems 55M20 Fixed points and coincidences in algebraic topology Keywords:topological degree; periodic perturbation; non-dissipative system; harmonic solution PDFBibTeX XMLCite \textit{T. Ding}, Chin. Ann. Math. 2, 281--300 (1981; Zbl 0484.34025)