We construct a scalar, first order, almost periodic ODE (*) x + A(t)x - B(t) which admits bounded solutions, but no almost periodic solutions. Using this equation, we give an example of a two-dimensional, almost periodic system whose projective flow admits two minimal subsets, one of which is almost automor- phic but not almost periodic. Finally, we show that some equation in the hull of (*) admits an almost automorphic, nonalmost periodic solution.
A linear, almost periodic equation with an almost automorphic solution / R. Johnson. - In: PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY. - ISSN 0002-9939. - STAMPA. - 82:(1981), pp. 199-205. [10.1090/s0002-9939-1981-0609651-0]
A linear, almost periodic equation with an almost automorphic solution
JOHNSON, RUSSELL ALLAN
1981
Abstract
We construct a scalar, first order, almost periodic ODE (*) x + A(t)x - B(t) which admits bounded solutions, but no almost periodic solutions. Using this equation, we give an example of a two-dimensional, almost periodic system whose projective flow admits two minimal subsets, one of which is almost automor- phic but not almost periodic. Finally, we show that some equation in the hull of (*) admits an almost automorphic, nonalmost periodic solution.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.