Definitions
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Set of symbols
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Alphabet
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Deduction system
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Theory
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Zermelo-Fraenkel set theory
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Set
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Binary cartesian set product
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Binary relation
Binary endorelation
Formulation 0
A
D4: Binary relation
$(X \times Y, R)$ is a
binary endorelation
if and only if \begin{equation} X = Y \end{equation}
Child definitions
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D289: Antisymmetric binary relation
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D293: Asymmetric binary relation
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D184: Constancy relation
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D2696: Digraph
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D178: Equivalence relation
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D287: Reflexive binary relation
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D288: Transitive binary relation