{ "id": "1812.04925", "version": "v1", "published": "2018-12-12T12:56:23.000Z", "updated": "2018-12-12T12:56:23.000Z", "title": "On Bohr's theorem for general Dirichlet series", "authors": [ "Ingo Schoolmann" ], "categories": [ "math.FA" ], "abstract": "We present quantitative versions of Bohr's theorem on general Dirichlet series $D=\\sum a_{n} e^{-\\lambda_{n}s}$ assuming different assumptions on the frequency $\\lambda:=(\\lambda_{n})$, including the conditions introduced by Bohr and Landau. Therefore using the summation method by typical (first) means invented by M. Riesz, without any condition on $\\lambda$, we give upper bounds for the norm of the partial sum operator $S_{N}(D):=\\sum_{n=1}^{N} a_{n}(D)e^{-\\lambda_{n}s}$ of length $N$ on the space $\\mathcal{D}_{\\infty}^{ext}(\\lambda)$ of all somewhere convergent $\\lambda$-Dirichlet series allowing a holomorphic and bounded extension to the open right half plane $[Re>0]$. As a consequence for some classes of $\\lambda$'s we obtain a Montel theorem in $\\mathcal{D}_{\\infty}(\\lambda)$; the space of all $D \\in \\mathcal{D}_{\\infty}^{ext}(\\lambda)$ which converge on $[Re>0]$. Moreover following the ideas of Neder we give a construction of frequencies $\\lambda$ for which $\\mathcal{D}_{\\infty}(\\lambda)$ fails to be complete.", "revisions": [ { "version": "v1", "updated": "2018-12-12T12:56:23.000Z" } ], "analyses": { "keywords": [ "general dirichlet series", "bohrs theorem", "open right half plane", "partial sum operator", "montel theorem" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }