semilattice
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English
Etymology
Noun
semilattice (plural semilattices)
- (mathematics) A partially ordered set that either has a join (a least upper bound) for any nonempty finite subset (a join-semilattice or upper semilattice) or has a meet (or greatest lower bound) for any nonempty finite subset (a meet-semilattice or lower semilattice). Equivalently, an underlying set which has a binary operation which is associative, commutative, and idempotent.
References
- ^ Vaughan Pratt (2004) Chapter 1 : Lattice Theory, boole.stanford.edu, §1.2.2