Bulletin of the American Mathematical Society · 1964 · 16 citations · 6 references
ComputingComputer ScienceMathematicsAlgebraAlgorithmsSet TheoryBoolean AlgebraBoolean OperationsPredicate LogicRelational AlgebraRelational Data ModelRelational DatabasesBinary RelationshipsIntersectionRelational Semantics
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On decompositions of a commutative semigroup
Takayuki Tamura, Naoki Kimura · Kodai Mathematical Journal · 1954 · 89 citations · Full text
Some studies on closure relations
Öystein Ore · Duke Mathematical Journal · 1943 · 41 citations