Geodesic
Existence of positive periodic solutions for neutral functional differential equations
Electronic journal of differential equations, Tome 2006 (2006)
We find sufficient conditions for the existence of positive periodic solutions of two kinds of neutral differential equations. Using Krasnoselskii's fixed-point theorem in cones, we obtain results that extend and improve previous results. These results are useful mostly when applied to neutral equations with delay in bio-mathematics.
Classification : 34C25
Keywords: positive periodic solution, cone, neutral delay differential equation, fixed-point theorem 
@article{EJDE_2006__2006__a194,
     author = {Li,  Zhixiang and Wang,  Xiao},
     title = {Existence of positive periodic solutions for neutral functional differential equations},
     journal = {Electronic journal of differential equations},
     year = {2006},
     volume = {2006},
     zbl = {1099.34063},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a194/}
}
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Li,  Zhixiang; Wang,  Xiao. Existence of positive periodic solutions for neutral functional differential equations. Electronic journal of differential equations, Tome 2006 (2006). http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a194/