Geodesic
Asymptotically almost periodic solutions of some linear evolution equations
Sbornik. Mathematics, Tome 61 (1988) no. 1, pp. 1-8 Cet article a éte moissonné depuis la source Math-Net.Ru

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Asymptotically almost periodic (a.a.p.) solutions of the evolution equation $$ \frac{du}{dt}+A(t)u=f(t) $$ in certain Hilbert spaces are studied. Under the assumption of an a.a.p. operator $A(t)$ and function $f(t)$, it is proved that the solution $u(t)$ is a.a.p. in various Hilbert spaces, i.e., the solution can be represented in the form $u(t)=v(t)+\alpha(t)$, where $v(t)$ is an almost periodic function and $\alpha(t)\to0$ as $t\to\infty$ in the corresponding space. The first boundary value problem for a second-order parabolic equation is considered as an example. Bibliography. 12 titles. 
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B. G. Ararktsyan. Asymptotically almost periodic solutions of some linear evolution equations. Sbornik. Mathematics, Tome 61 (1988) no. 1, pp. 1-8. http://geodesic.mathdoc.fr/item/SM_1988_61_1_a0/

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