{ "id": "1108.3392", "version": "v1", "published": "2011-08-17T04:16:53.000Z", "updated": "2011-08-17T04:16:53.000Z", "title": "Existence of bounded uniformly continuous mild solutions on $\\Bbb{R}$ of evolution equations and some applications", "authors": [ "Bolis Basit", "Hans Günzler" ], "comment": "16 pages", "categories": [ "math.FA" ], "abstract": "We prove that there is $x_{\\phi}\\in X$ for which (*)$\\frac{d u(t)}{dt}= A u(t) + \\phi (t) $, $u(0)=x$ has on $\\r$ a mild solution $u\\in C_{ub} (\\r,X)$ (that is bounded and uniformly continuous) with $u(0)=x_{\\phi}$, where $A$ is the generator of a holomorphic $C_0$-semigroup $(T(t))_{t\\ge 0}$ on ${X}$ with sup $_{t\\ge 0} \\,||T(t)|| < \\infty$, $\\phi\\in L^{\\infty} (\\r,{X})$ and $i\\,sp (\\phi)\\cap \\sigma (A)=\\emptyset$. As a consequence it is shown that if $\\n$ is the space of almost periodic $AP$, almost automorphic $AA$, bounded Levitan almost periodic $LAP_b$, certain classes of recurrent functions $REC_b$ and $\\phi \\in L^{\\infty} (\\r,{X})$ such that $M_h \\phi:=(1/h)\\int_0^h \\phi (\\cdot+s)\\, ds \\in \\n$ for each $h >0$, then $u\\in \\n\\cap C_{ub}$. These results seem new and generalize and strengthen several recent Theorems.", "revisions": [ { "version": "v1", "updated": "2011-08-17T04:16:53.000Z" } ], "analyses": { "subjects": [ "47D06", "43A60", "43A99", "47A10" ], "keywords": [ "bounded uniformly continuous mild solutions", "evolution equations", "applications", "recurrent functions", "bounded levitan" ], "note": { "typesetting": "TeX", "pages": 16, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2011arXiv1108.3392B" } } }