ON THE NUMBER OF POSITIVE PERIODIC SOLUTIONS OF FUNCTIONAL DIFFERENTIAL EQUATIONS AND POPULATION MODELS
ON THE NUMBER OF POSITIVE PERIODIC SOLUTIONS OF FUNCTIONAL DIFFERENTIAL EQUATIONS AND POPULATION MODELS
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DOI：
10.1142/s0218202505000467
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发表时间：
2005-04
影响因子：
3.5
通讯作者：
D. Jiang;D. O’Regan;R. Agarwal;Xiaojie Xu
中科院分区：
文献类型：
--
作者：
D. Jiang;D. O’Regan;R. Agarwal;Xiaojie Xu
In this paper, we employ the fixed point index on cones to study the existence, multiplicity and nonexistence of positive periodic solutions to a system of infinite delay equations, in which λ > 0 is a parameter. We prove some general theorems and establish new periodicity conditions for several population growth models.
