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A submultiplicative function
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.ORCID iD: 0000-0002-9584-4083
Department of Mathematics, University of Lund, Department of Mathematics, University of Stockholm, Centre for Mathematical Sciences, Lund University.
1987 (English)Report (Other academic)
Abstract [en]

Let a≥1 and fa (x)=ln(x+a). It is shown that the function fa is submultiplicative on [0,∞) if and only if a ≥ e. 2. Moreover, the function fa is submultiplicative on [1,∞) if and only if a ≥ ao = 1.7550696584…The techniques the authors describe can also be used for other functions f different from fa.

Place, publisher, year, edition, pages
Stockholm: Department of Mathematics, University of Stockholm , 1987. , 7 p.
Series
Reports / Department of Mathematics, University of Stockholm, Sweden, ISSN 0348-7652 ; 1987:30
National Category
Mathematical Analysis
Research subject
Mathematics
Identifiers
URN: urn:nbn:se:ltu:diva-22307Local ID: 259b0e45-6528-4543-b11d-bad34bdfc47eOAI: oai:DiVA.org:ltu-22307DiVA: diva2:995356
Note
Godkänd; 1987; 20160309 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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