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Singularity theorems and the abstract boundary construction

Ashley, Michael

Description

The abstract boundary construction of Scott and Szekeres has proven a practical classification scheme for boundary points of pseudo-Riemannian manifolds. It has also proved its utility in problems associated with the re-embedding of exact solutions containing directional singularities in space-time. Moreover it provides a model for singularities in space-time - essential singularities. However the literature has been devoid of abstract boundary results which have results of direct physical...[Show more]

dc.contributor.authorAshley, Michael
dc.date.accessioned2008-01-15T04:16:39Z
dc.date.accessioned2011-01-04T02:37:31Z
dc.date.available2008-01-15T04:16:39Z
dc.date.available2011-01-04T02:37:31Z
dc.identifier.otherb21519882
dc.identifier.urihttp://hdl.handle.net/1885/46055
dc.description.abstractThe abstract boundary construction of Scott and Szekeres has proven a practical classification scheme for boundary points of pseudo-Riemannian manifolds. It has also proved its utility in problems associated with the re-embedding of exact solutions containing directional singularities in space-time. Moreover it provides a model for singularities in space-time - essential singularities. However the literature has been devoid of abstract boundary results which have results of direct physical applicability.¶ This thesis presents several theorems on the existence of essential singularities in space-time and on how the abstract boundary allows definition of optimal em- beddings for depicting space-time. Firstly, a review of other boundary constructions for space-time is made with particular emphasis on the deficiencies they possess for describing singularities. The abstract boundary construction is then pedagogically defined and an overview of previous research provided.¶ We prove that strongly causal, maximally extended space-times possess essential singularities if and only if they possess incomplete causal geodesics. This result creates a link between the Hawking-Penrose incompleteness theorems and the existence of essential singularities. Using this result again together with the work of Beem on the stability of geodesic incompleteness it is possible to prove the stability of existence for essential singularities.¶ Invariant topological contact properties of abstract boundary points are presented for the first time and used to define partial cross sections, which are an generalization of the notion of embedding for boundary points. Partial cross sections are then used to define a model for an optimal embedding of space-time.¶ Finally we end with a presentation of the current research into the relationship between curvature singularities and the abstract boundary. This work proposes that the abstract boundary may provide the correct framework to prove curvature singularity theorems for General Relativity. This exciting development would culminate over 30 years of research into the physical conditions required for curvature singularities in space-time.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.subjectessential singularities • space-time • optimal embeddings • Beem • curvature singularities • abstract boundary • theorems • General Relativity • a-boundary • Riemannian manifolds
dc.titleSingularity theorems and the abstract boundary construction
dc.typeThesis (PhD)
dcterms.valid2002
local.description.refereedyes
local.type.degreeDoctor of Philosophy (PhD)
dc.date.issued2002
local.type.statusAccepted version
local.contributor.affiliationThe Australian National University
local.contributor.affiliationFaculty of Science
local.contributor.affiliationAshley, Michael John Siew Leung
local.identifier.doi10.25911/5d7a2ad1aa884
dcterms.accessRightsOpen Access
local.mintdoimint
CollectionsOpen Access Theses

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