define null relation?
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The null relation is a relation R in S to T such that R is the empty set: R⊆S×T:R=∅ That is, no element of S relates to any element in T: R:S×T:∀(s,t)∈S×T:¬sRt
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The null relation is a relation R in S to T such that R is the empty set: R⊆S×T:R=∅ That is, no element of S relates to any element in T: R:S×T:∀(s,t)∈S×T:¬sRt.
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