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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
exaly
About the fundamental relations defined on the hypergroupoids associated with binary relations
European Journal of Combinatorics, 2011Irina Cristea
exaly
On the origin of the fundamental metallicity relation and the scatter in galaxy scaling relations
Monthly Notices of the Royal Astronomical Society, 2014Mark Krumholz +2 more
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