●海 紅

(武警學(xué)院 基礎(chǔ)部,河北廊坊 065000)

1 準(zhǔn)備工作

2 周期解的存在性

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[2]BURTON T A.Periodic solutions of Volterra equations[J].Funkcialaj Ekvacioj,1984,27：229-253.

[3]MILLER R K.Nonlinear Volterra integral equations[M].Enjam in,Melno Park,California,1971.

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[6]HALE JK,KATO J.Phase space for retarded equations with infinite delay[J].Funkcial.Ekvac.,1978,21(1)：11-41.