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出典:Wikipedia
出典:『Wikipedia』 (2009/09/28 17:28 UTC 版)
In mathematics, a coreflexive relation is a binary relation that is a subset of the identity relation. Thus if a is related to b (aRb) then a is equal to b (a = b), but if c is equal to d (c = d) it does not necessarily hold that c is related to d (cRd).
Coreflexive relation