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- Orientifold abstract "In theoretical physics orientifold is a generalization of the notion of orbifold, proposed by Augusto Sagnotti in 1987. The novelty is that in the case of string theory the non-trivial element(s) of the orbifold group includes the reversal of the orientation of the string. Orientifolding therefore produces unoriented strings—strings that carry no "arrow" and whose two opposite orientations are equivalent. Type I string theory is the simplest example of such a theory and can be obtained by orientifolding type IIB string theory.In mathematical terms, given a smooth manifold , two discrete, freely acting, groups and and the worldsheet parity operator (such that ) an orientifold is expressed as the quotient space . If is empty, then the quotient space is an orbifold. If is not empty, then it is an orientifold.".
- Orientifold wikiPageID "672301".
- Orientifold wikiPageRevisionID "598449883".
- Orientifold hasPhotoCollection Orientifold.
- Orientifold subject Category:Generalized_manifolds.
- Orientifold subject Category:String_theory.
- Orientifold type Artifact100021939.
- Orientifold type Conduit103089014.
- Orientifold type GeneralizedManifolds.
- Orientifold type Manifold103717750.
- Orientifold type Object100002684.
- Orientifold type Passage103895293.
- Orientifold type PhysicalEntity100001930.
- Orientifold type Pipe103944672.
- Orientifold type Tube104493505.
- Orientifold type Way104564698.
- Orientifold type Whole100003553.
- Orientifold type YagoGeoEntity.
- Orientifold type YagoPermanentlyLocatedEntity.
- Orientifold comment "In theoretical physics orientifold is a generalization of the notion of orbifold, proposed by Augusto Sagnotti in 1987. The novelty is that in the case of string theory the non-trivial element(s) of the orbifold group includes the reversal of the orientation of the string. Orientifolding therefore produces unoriented strings—strings that carry no "arrow" and whose two opposite orientations are equivalent.".
- Orientifold label "Orientifold".
- Orientifold label "Orientifold".
- Orientifold sameAs Orientifold.
- Orientifold sameAs 오리엔티폴드.
- Orientifold sameAs m.031nt6.
- Orientifold sameAs Q3356307.
- Orientifold sameAs Q3356307.
- Orientifold sameAs Orientifold.
- Orientifold wasDerivedFrom Orientifold?oldid=598449883.
- Orientifold isPrimaryTopicOf Orientifold.