Electron. J. Diff. Eqns., Vol. 2005(2005), No. 103, pp. 1-8.

Periodic trajectories for evolution equations in Banach spaces

Mircea D. Voisei

Abstract:
The existence of periodic solutions for the evolution equation
$$ y'(t)+Ay(t)\ni F(t,y(t)) $$
is investigated under considerably simple assumptions on $A$ and $F$. Here $X$ is a Banach space, the operator $A$ is $m$-accretive, $-A$ generates a compact semigroup, and $F$ is a Caratheodory mapping. Two examples concerning nonlinear parabolic equations are presented.

Submitted August 3, 2005. Published September 28, 2005.
Math Subject Classifications: 47J35, 34C25, 35K55.
Key Words: Periodic solution, evolution equation of parabolic type.

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Mircea D. Voisei
Department of Mathematics
MAGC 3.734, The University of Texas - Pan American
Edinburg, TX 78539, USA
email: mvoisei@utpa.edu

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