+A **poset** (partially ordered set) is a fundamental structure in mathematics, where elements within a [Set](/wiki/Set) are arranged by a special kind of [Order](/wiki/Order). This order is not necessarily total, meaning some elements might be incomparable, yet it defines a consistent, directional relationship.
+## See also
+- [Lattice](/wiki/Lattice)
+- [Chain](/wiki/Chain)
+- [Antichain](/wiki/Antichain)
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