摘要
With the help of a continuation theorem based on Gaines and Mawhin's coincidence degree, we study the global existence of positive periodic solutions of a 'food-limited' population model with toxicants and time delays. Some new results are obtained.
With the help of a continuation theorem based on Gaines and Mawhin's coincidence degree, we study the global existence of positive periodic solutions of a 'food-limited' population model with toxicants and time delays. Some new results are obtained.
基金
Supported by the National Natural Sciences Foundation of China (No.10171010)
Key Project on Sciences and Technology of the Ministry of Education of China (No. Key 01061)
the Natural Sciences Foundation for Young Scholar of Northeast Normal Unive
