Ein Schließungssatz für Inzidenz und Orthogonalität in Möbiusebenen

Ohne Zusammenfassung     

Konvexe polytope mit symmetriegruppe

Ohne Zusammenfassung     

Apparatur zur säulenelektrophorese in nichtwässrigen lösungsmitteln

An apparatus for electrophoresis in non-aqueous solvents is described, which makes it possible to work in field strengths up to 150 V/cm and at temperatures down to ?50°. A flow-through cell with two double “Suprasil” windows facilitates the photometric evaluation of the separations, and keeps the sample cool until it reaches the detection system. Potassium Polysulphides have been separated as an example of salts sensitive to hydrolysis, thiocyanato(phenylenediamine)chromium(III) complexes as an example of salts only slightly soluble in water, and aromatic sulphonates as an example of salts complexed by crown compounds.     

On the football pool problem for 6 matches: A new upper bound

Consider the set (F₃)⁶ of all 6 tuples x=(x₁,…, x₆) with x_i? {0, 1, 2}. We show that there exists a subset $\text{T}$ of (F₃)⁶ with 79 elements such that for any x of (F₃)⁶ there is an element if $\text{T}$ which differs from x in at most one coordinate.