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First,We reviewed the definitions of lattice implication algebras,lattice implication subalgebras,and LI-ideals,and provided an equivalent definition of LI-ideal.Then we investigated some properties of lattice implication subalgebra and LI-ideal,and found the least lattice implication subalgebra.Finally,the relation between lattice implication subalgebra and LI-ideal is presented.It is proved that no LI-ideals are non-trivial lattice implication subalgebras. 相似文献
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