最終更新日:2024/08/08
(set theory) Of a binary relation, to have every element of the left set occur at least once: ∀a∈A∃b∈B:(a,b)∈R⊆A⨯B
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left total
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(set theory) Of a binary relation, to have every element of the left set occur at least once: ∀a∈A∃b∈B:(a,b)∈R⊆A⨯B
left total