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Fundamental relation on non-associative hypergroupoids
1999The paper deals with the fundamental relation \(\beta^*\) defined on non-associative hypergroupoids. The relation \(\beta^*\) on classes weaker than semihypergroups is studied, in relation with axioms originating from feebly associativity and strongly regular equivalence. Examples are also provided.
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Scaling relations and the fundamental line of the local group dwarf galaxies
Monthly Notices of the Royal Astronomical Society, 2008Stéphane Courteau +2 more
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Hypergroupoids and fundamental relation
1994In this work we study hypergroupoids whose β-relation is transitive, by using the fundamental relations β, β*, δ and δ*. We take several examples, finding the necessary and sufficient conditions such that a quasi-hypergroup has β*=β=δ=δ* (i.e. it is of kind T_1).
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Fundamental groups of some ergodic equivalence relations of type II∞
Qualitative Theory of Dynamical Systems, 2003Sergey L Gefter
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