摘要
利用重合度理论研究具有任意有限时滞的两种群非自治Lotka-Volterra互惠系统,获得了周期正 解的存在性,推广了Gopalsamy及He(1997)和杨帆等(2002)的工作。
With the help of a continuation theorem based on Gaines and Mawhin's coincidence degree, easily verifiable criteria are established for the global existence of positive periodic colutions of the facultative system with several delays. The result we obtained here generalized the result of Gopalsamy and He (1997) and Yang Fan et al (2002).
出处
《工程数学学报》
CSCD
北大核心
2004年第3期403-409,共7页
Chinese Journal of Engineering Mathematics
基金
This work is supported by the the grant APFU-0030824228
of Fuzhou University,the grant DSTFU-2003-QX-21
the grant FJEB-JB01023.
