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Certain posets have a binary operation meet denoted by , such that is the greatest lower bound of and . Such posets are called meet-semilattices, or -semilattices, or lower semilattices.
If and are both meets of and , then and , and so ; thus a meet, if it exists, is unique. The meet is also known as the and operator.
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new image: approximation_to_sinx by jeremyboden
new question: Solving the word problem for isomorphic groups by mairiwalker
new image: LineDiagrams.jpg by m759
new image: ProjPoints.jpg by m759
new image: AbstrExample3.jpg by m759
new image: four-diamond_figure.jpg by m759
May 16
new problem: Curve fitting using the Exchange Algorithm. by jeremyboden
new question: Undirected graphs and their Chromatic Number by Serchinnho


