Article
Keywords:
Leray-Schauder theorem; periodic boundary value problem; existence; uniqueness; periodic solutions; convexity of set of solutions
Summary:
In the paper some existence results for periodic boundary value problems for the ordinary differential equation of the second order in a Hilbert space are given. Under some auxiliary assumptions the set of solutions is compact and connected or it is convex.
References:
[D] K. Deimling:
Ordinary differential equations in Banach spaces. Springer-Verlag, Berlin-Heidelberg-New York, 1977.
MR 0463601 |
Zbl 0361.34050
[GŠŠ] M. Greguš M. Švec V. Šeda: Ordinary differential equations. Alfa, Bratislava, 1985. (In Slovak.)
[G] Chaitan P. Gupta:
Boundary value problems for differential equations in Hilbert spaces involving reflection of the argument. JMAA 128 (1987), 375-388.
MR 0917372
[R] B. Rudolf:
Periodic boundary value problem in Hilbert space for differential equation of second order with reflection of the argument. Mathematica Slovaca 42 (1992), 65-84.
MR 1159492 |
Zbl 0744.34062