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On a strongly regular relation in hypergroupoids
1993Let \(H\) be a hypergroupoid and \(n \in \mathbb{N}^*\). Let \(\gamma\) be a grouping of the indices \(\{1,\dots,n\}\) respecting their order. If \(z_ 1,z_ 2,\dots,z_ n\) are elements of \(H\) we denote by \(\displaystyle\prod^ n_{i=1}{^{(\gamma)} z_ i}\) the product of these elements according to \(\gamma\). Define on \(H\) a relation \(\Delta\) by: \(
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Sur les hypergroupoides residues generalises
Rendiconti del Circolo Matematico di Palermo, 1986openaire +1 more source
Generalized designs, linear spaces, hypergroupoids and algebraic cryptography
1990BERARDI L. +2 more
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