Zur Kenntniss einiger Hydroproducte der Cinchoninsäure

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Lein?l, Lein?lfirniss und Oelfarben

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A parallel method for time discretization of parabolic equations based on Laplace transformation and quadrature

We consider the discretization in time of an inhomogeneous parabolicequation in a Banach space setting, using a representation ofthe solution as an integral along a smooth curve in the complexleft half-plane which, after transformation to a finite interval,is then evaluated to high accuracy by a quadrature rule. Thisreduces the problem to a finite set of elliptic equations withcomplex coefficients, which may be solved in parallel. The paperis a further development of earlier work by the authors, wherewe treated the homogeneous equation in a Hilbert space framework.Special attention is given here to the treatment of the forcingterm. The method is combined with finite-element discretizationin spatial variables.     

Ueber die Anwendung eines Reflectors bei Spectral-Untersuchungen

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Essigsaures Uranoxydnatron zur maassanalytischen Bestimmung der Phosphors?ure

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Ein Verfahren zur Bestimmung der Salpeters?ure oder der Alkalinitrate

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