Periodic Solutions of Periodic Delay Lotka–Volterra Equations and Systems

• DOI: 10.1006/jmaa.2000.7248
• Publication Date: 2002-09-18T15:51:29Z
• Authors: Yongkun Li; Yang Kuang
• Keywords: Degree (music); Continuation

AbstractBy using the continuation theorem of coincidence degree theory, sufficient and realistic conditions are obtained for the existence of positive periodic solutions for both periodic Lotka–Volterra equations and systems with distributed or state-dependent delays. Our results substantially extend and improve existing results.