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- Duality_(order_theory) abstract "In the mathematical area of order theory, every partially ordered set P gives rise to a dual (or opposite) partially ordered set which is often denoted by Pop or Pd. This dual order Pop is defined to be the set with the inverse order, i.e. x ≤ y holds in Pop if and only if y ≤ x holds in P. It is easy to see that this construction, which can be depicted by flipping the Hasse diagram for P upside down, will indeed yield a partially ordered set. In a broader sense, two posets are also said to be duals if they are dually isomorphic, i.e. if one poset is order isomorphic to the dual of the other.The importance of this simple definition stems from the fact that every definition and theorem of order theory can readily be transferred to the dual order. Formally, this is captured by the Duality Principle for ordered sets: If a given statement is valid for all partially ordered sets, then its dual statement, obtained by inverting the direction of all order relations and by dualizing all order theoretic definitions involved, is also valid for all partially ordered sets.If a statement or definition is equivalent to its dual then it is said to be self-dual. Note that the consideration of dual orders is so fundamental that it often occurs implicitly when writing ≥ for the dual order of ≤ without giving any prior definition of this "new" symbol.".
- Duality_(order_theory) wikiPageID "600618".
- Duality_(order_theory) wikiPageRevisionID "546059869".
- Duality_(order_theory) hasPhotoCollection Duality_(order_theory).
- Duality_(order_theory) subject Category:Duality_theories.
- Duality_(order_theory) subject Category:Order_theory.
- Duality_(order_theory) type Abstraction100002137.
- Duality_(order_theory) type Cognition100023271.
- Duality_(order_theory) type DualityTheories.
- Duality_(order_theory) type Explanation105793000.
- Duality_(order_theory) type HigherCognitiveProcess105770664.
- Duality_(order_theory) type Process105701363.
- Duality_(order_theory) type PsychologicalFeature100023100.
- Duality_(order_theory) type Theory105989479.
- Duality_(order_theory) type Thinking105770926.
- Duality_(order_theory) comment "In the mathematical area of order theory, every partially ordered set P gives rise to a dual (or opposite) partially ordered set which is often denoted by Pop or Pd. This dual order Pop is defined to be the set with the inverse order, i.e. x ≤ y holds in Pop if and only if y ≤ x holds in P. It is easy to see that this construction, which can be depicted by flipping the Hasse diagram for P upside down, will indeed yield a partially ordered set.".
- Duality_(order_theory) label "Duality (order theory)".
- Duality_(order_theory) sameAs m.02v74t.
- Duality_(order_theory) sameAs Q554403.
- Duality_(order_theory) sameAs Q554403.
- Duality_(order_theory) sameAs Duality_(order_theory).
- Duality_(order_theory) wasDerivedFrom Duality_(order_theory)?oldid=546059869.
- Duality_(order_theory) isPrimaryTopicOf Duality_(order_theory).