Zur Theorie der Kaltvulkanisation des Kautschuks

Ohne Zusammenfassung(Vorläufige Mitteilung aus dem Kgl. Materialprüfungsamte zu Groß-Lichterfelde-West.)     

Über die Lösungen der linearen partiellen Differentialgleichungen zweiter Ordnung vom elliptischen Typus

Ohne Zusammenfassung     

Über algebraisch rektifizierbare transzendente Kurven

Ohne Zusammenfassung     

Über den zentralen Grenzwertsatz der Wahrscheinlichkeitsrechnung. II

Ohne Zusammenfassung     

Bestimmung des Siliciums in Ferrosilicium

Ohne Zusammenfassung     

Zur Theorie der endlichen Gruppen topologischer Abbildungen von geschlossenen Flächen in sich

Ohne Zusammenfassung     

Continuous bordering of matrices and continuous matrix decompositions

Summary. Let be the set of all real -matrices of rank . We prove that for there are no continuous vector fields such that the bordered matrix is regular for all . This result has some relevance for the numerical analysis of steady state bifurcation. As a by-product we show that there is no nonvanishing continuous vector field with for all , where is the set of all matrices of rank deficiency one. This implies that there is no singular value decomposition of depending continuously on in any matrix set which contains . As another application we prove that in general there is no global analytic singular value decomposition for analytic matrix valued functions of more than one real variable. Received October 6, 1993 / Revised version received July 18, 1994     

Cleavage of the C---Se bond of cyclic selenoacetals derived from 4-t-butyl cyclohexanone with butyllithiums and tin and silyl hydrides

Selenoacetals derived from 1,3-propanediselenol and 1,2-ethanediselenol are much less prone to be cleaved by butyllithiums than their open chain analogues. The stereochemistry of the products resulting from these reactions as well as from the cleavage of the C---Se bond under radical conditions is disclosed.     

Diastereoselective addition of silyl- and stannyl metals to γ-alkoxy-alkylidene malonates

Stereochemical control of the addition of silyl- and stannyl metals to chiral γ-alkoxy-alkylidene malonates proved to be dependant on the nature of the counter ion and of the solvent but in an unpredictable way.