Lattice theory

Maximal semilattice quotient

In abstract algebra, a branch of mathematics, a maximal semilattice quotient is a commutative monoid derived from another commutative monoid by making certain elements equivalent to each other. Every commutative monoid can be endowed with its algebraic preordering ≤ . By definition, x≤ y holds, if there exists z such that x+z=y. Further, for x, y in M, let hold, if there exists a positive integer n such that x≤ ny, and let hold, if and . The binary relation is a monoid congruence of M, and the quotient monoid is the maximal semilattice quotient of M. This terminology can be explained by the fact that the canonical projection p from M onto is universal among all monoid homomorphisms from M to a (∨,0)-semilattice, that is, for any (∨,0)-semilattice S and any monoid homomorphism f: M→ S, there exists a unique (∨,0)-homomorphism such that f=gp. If M is a refinement monoid, then is a distributive semilattice. (Wikipedia).

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Related pages

Binary relation | Equivalence relation | Preorder | Abstract algebra | Congruence relation | Mathematics | Semilattice | Refinement monoid | Distributivity (order theory)