This work was supported in part by: The Danish Medical Research Councils (SSVF) The Alfred Benzon Foundation, The Johann Weiman f. Seedorff and wife Foundation (Købmand i Odense Johann og Hanne Weimann f. Seedorff’s Legat), The Leo Foundation, The Willumsen Foundation (Fabrikant Einar Willumsens Mindelegat), The Danielsen foundation (Aase og Ejnar Danielsens Fond), The Magnus Bergvall Foundatio...

Commencing from a global-error formula, originally due to Henrici, we investigate the accumulation of global error in the numerical solution of linear highly-oscillating systems of the form y 00 + g(t)y = 0, where g(t) t!1 ?! 1. Using WKB analysis we derive an explicit form of the global-error envelope for Runge{Kutta and Magnus methods. Our results are closely matched by numerical experiments....

Peptococcus magnus is a biochemically inactive anaerobic Gram-positive coccus similar in morphology to the staphylococcus. It has been found (Smith, 1975) as part of the normal flora of the mouth, vagina, and skin. Previous reports (Pien et al., 1972; Spaulding et al., 1974) have described significant infections with this organism, but knowledge of its pathogenicity is incomplete since speciati...

In this paper entrepreneurs are defined as agents who bring about economic change by combining their own effort with other factors of production in search of economic rents. The institutional setup is argued to determine both the supply and direction of entrepreneurial activity. Four key institutions are explored more closely: property rights protection, savings policies, taxation and the regul...

Gunther Auer, Vito Giannini, István Gódor, Magnus Olsson, Muhammad Ali Imran, Dario Sabella, Manuel J. Gonzalez Oliver Blume, Albrecht Fehske, Jose Alonso Rubio, Pål Frenger, Claude Desset DOCOMO Euro-Labs, D-80687 Munich, Germany IMEC, Leuven, Belgium Ericsson Research, Budapest H-1117, Hungary Ericsson Research, SE-164 80 Stockholm, Sweden CCSR University of Surrey, Guildford GU2 7XH, UK Tele...

This paper extends the method of Magnus series to Lie-algebraic equations originating in double-bracket ows. We show that the solution of the isospec-tral ow Y 0 = Y; N]; Y ], Y (0) = Y0 2 Sym(n), can be represented in the form Y (t) = e (t) Y0e ?(t) , where the Taylor expansion of can be constructed explicitly , term-by-term, identifying individual expansion terms with certain rooted trees wit...

High Harmonic Generation (HHG) promises to provide insight into ultrafast dynamics and has been at the forefront of attosecond physics since its discovery. One class materials that demonstrate HHG are Mott insulators whose electronic properties great interest given their strongly-correlated nature. Here, we use paradigmatic representation insulators, half-filled Fermi-Hubbard model, investigate...