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On permutable N-groups

W. A. Dudek, Z. Stojakovic (1988)

Beiträge zur Algebra und Geometrie = Contributions to algebra and geometry

On Rusakov’s n -ary r s -groups

Wiesław Aleksander Dudek, Zoran Stojaković (2001)

Czechoslovak Mathematical Journal

Properties of n -ary groups connected with the affine geometry are considered. Some conditions for an n -ary r s -group to be derived from a binary group are given. Necessary and sufficient conditions for an n -ary group < θ , b > -derived from an additive group of a field to be an r s -group are obtained. The existence of non-commutative n -ary r s -groups which are not derived from any group of arity m < n for every n 3 , r > 2 is proved.

On symmetries and parallelogram spaces.

Mirko Polonijo (1985)

Stochastica

The notion of a TST-space is introduced and its connection with a parallelogram space is given. The existence of a TST-space is equivalent to the existence of a parallelogram space, which is a new characterization of a parallelogram space. The structure of a TST-space is described in terms of an abelian group.

On π-Groupoids

Zoran Stojaković, Janez Ušan (1979)

Publications de l'Institut Mathématique

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