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Relational calculus question, universal quantifier

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#relation-algebra
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xor of three relations using Relation Algebra operations

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#abstract-algebra #category-theory #relations #relation-algebra
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#discrete-mathematics #logic #algorithms #relations #relation-algebra
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#constraints #multivalued-functions #relation-algebra
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#logic #relation-algebra
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#relations #equivalence-relations #relation-algebra
233
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E1 and E2 are equivalent then they are "almost equivalent"

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#relations #equivalence-relations #relation-algebra
56
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67
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Can a tuple be defined as an instance of a relationship?

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#linear-algebra #relations #relation-algebra

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