On almost periodic solutions of the differential equation x″(t)=Ax(t) in Hilbert spaces
oleh: Gaston M. N'Guerekata
| Format: | Article |
|---|---|
| Diterbitkan: | Wiley 2001-01-01 |
Deskripsi
We prove almost periodicity of solutions of the equation x″(t)=Ax(t) when the linear operator A satisfies an inequality of the form Re(Ax,x)≥0.