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Hypergroupoids and fundamental relation

1994
In 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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Definitions and Fundamental Relations

1954
Paul F. Byrd, Morris D. Friedman
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Relations between Fundamental Functions

1969
Leo Sario, Kôtaro Oikawa
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