Eine Bemerkung über ausgezeichnete Kongruenzrelationen der Brandtschen Gruppoiden
Ternary rings associated to translation plane
Eine Bemerkung über eine Koordinatisierung der Translationsebenen
Skeletons in multigraphs
Under a multigraph it is meant in this paper a general incidence structure with finitely many points and blocks such that there are at least two blocks through any point and also at least two points on any block. Using submultigraphs with saturated points there are defined generating point sets, point bases and point skeletons. The main result is that the complement to any basis (skeleton) is a skeleton (basis).
One generalization of quasifield
Closure conditions of commutativity
There are investigated some closure conditions of Thomsen type in 3-webs which gurantee that at least one of coordinatizing quasigroups of a given 3-web is commutative.
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