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"Inherent" or "pronominal" (inherently or essentially) reflexive verbs lack the corresponding non-reflexive from which they can be synchronically derived. [8] In other words, the reflexive pronoun "is an inherent part of an unergative reflexive or reciprocal verb with no meaning of its own, and an obligatory part of the verb's lexical entry": [10]
An example of a reflexive relation is the relation "is equal to" on the set of real numbers, since every real number is equal to itself. A reflexive relation is said to have the reflexive property or is said to possess reflexivity. Along with symmetry and transitivity, reflexivity is one of three properties defining equivalence relations.
A reflexive and symmetric relation is a dependency relation (if finite), and a tolerance relation if infinite. A preorder is reflexive and transitive. A congruence relation is an equivalence relation whose domain is also the underlying set for an algebraic structure, and which respects the additional structure.
If a relation is transitive then its transitive extension is itself, that is, if R is a transitive relation then R 1 = R. The transitive extension of R 1 would be denoted by R 2, and continuing in this way, in general, the transitive extension of R i would be R i + 1. The transitive closure of R, denoted by R* or R ∞ is the set union of R, R ...
The resulting relation is reflexive since the preorder is reflexive; transitive by applying the transitivity of twice; and symmetric by definition. Using this relation, it is possible to construct a partial order on the quotient set of the equivalence, S / ∼ , {\displaystyle S/\sim ,} which is the set of all equivalence classes of ∼ ...
A reflexive, weak, [1] or non-strict partial order, [2] commonly referred to simply as a partial order, is a homogeneous relation ≤ on a set that is reflexive, antisymmetric, and transitive. That is, for all a , b , c ∈ P , {\displaystyle a,b,c\in P,} it must satisfy:
An equivalence relation is a relation that is reflexive, symmetric, and transitive, like equality expressed through the symbol "=". [74] A strict partial order is a relation that is irreflexive, anti-symmetric, and transitive, like the relation being less than expressed through the symbol "<". [75]
Transitivity is a linguistics property that relates to whether a verb, participle, or gerund denotes a transitive object.It is closely related to valency, which considers other arguments in addition to transitive objects.