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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 52 for “"Compactification"”.
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Ultrafilters and compactification
… properties and describe a method of generating compactifications through the ultrafilter space. As part of investigating some properties of the ultrafilter space, we show that the ultrafilter space forms a monad in the category of topological spaces. Furthermore, we show that rendering the …
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Aspects of String Compactification
… addresses some interesting problems in string compactification relevant to phenomenology, especially cosmological models derived from string theory Most attention is drawn to stabilizing the moduli and discussing the cosmology solutions given the effective potential obtained from string theory. …
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Singularities of the Perfect Cone Compactification
… thesis analyses the singularities of toroidal compactifications. Motivated by a result of Shepherd-Barron about the first Voronoi compactification of the moduli space of principally polarised abelian varieties, the object taken into consideration consists of the perfect cone (also known as …
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Bubble tree compactification of instanton moduli spaces
We study the compactification of moduli spaces defined by the anti-self-dual (ASD) Yang-Mills equations on SU(2) or SO(3) bundles over closed oriented Riemannian 4-manifolds and 4-orbifolds. In general the ASD moduli space is not compact since the curvature of a sequence of connections may blow up …
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Bubble tree compactification of instanton moduli spaces
We study the compactification of moduli spaces defined by the anti-self-dual (ASD) Yang-Mills equations on SU(2) or SO(3) bundles over closed oriented Riemannian 4-manifolds and 4-orbifolds. In general the ASD moduli space is not compact since the curvature of a sequence of connections may blow up …
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Some subvarieties of the De Concini-Procesi compactification
… intrinsic structure of the De Concini-Procesi compactification of semi-simple adjoint algebraic groups and some relations with other topics of algebraic groups. In chapter 1, we study the closure of the totally positive part of an adjoint group in the group compactification. One result that we …
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The Picard scheme of a curve and its compactification
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1981.
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Applications of Numerical Methods in Heterotic Calabi-Yau Compactification
… different problems in heterotic Calabi-Yau compactification. We review algorithms for computing both the Ricci-flat metric on Calabi-Yau manifolds and Hermitian Yang-Mills connections on poly-stable holomorphic vector bundles over those spaces. We apply the numerical techniques for obtaining …
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On Amenable Semigroups and Applications of the Stone-Cech Compactification
Made available in DSpace on 2014-12-09T22:17:19Z (GMT). No. of bitstreams: 1 6503694.pdf: 1575964 bytes, checksum: 33ee92a640b3e31c685d550fe2068ad8 (MD5) Previous issue date: 1964
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Extending the Geometric Tools of Heterotic String Compactification and Dualities
… the apparent relationship between two heterotic compactifications seen in (0,2) heterotic target space dual pairs should, in principle, induce some putative correspondence between the dual F-theory geometries. It has previously been conjectured in the literature that (0,2) target space duality …
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Extreme Invariant Means and Minimal Sets in the Stone-Cech Compactification of a Semigroup
Made available in DSpace on 2014-12-11T18:23:32Z (GMT). No. of bitstreams: 1 7105092.pdf: 1499862 bytes, checksum: 6ff29ca9e7e86a9a9e5f448e11024d4a (MD5) Previous issue date: 1970
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Remainders and Connectedness of Ordered Compactifications
… principal properties for the theory of ordered compactifications relating to connectedness and to provide particular examples. The initial idea of this subject is based on the notion of the Stone-Cech compactification.<br />The ordered Stone-Cech compactification oX of an ordered topological …
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Normal bases and compactifications of frames
… well as a frame counterpart to their associated compactifications. Having completed this part of the task, it seemed natural to investigate the relationship between this compactification and those mentioned above. Hence the first five chapters of the dissertation are devoted to the study of the …
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Topological Dynamics On Compact Phase Spaces
… a realization of the existence of a universal compactification of a phase semigroup with an extended homomorphism onto the enveloping semigroup lead to an alternate approach to study these systems via this compactification. The importance of this alternative approach in this respect derives …
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Orbifold branes in string theory and their applications to cosmology.
This dissertation contains two distinct compactification schemes of 10-dimensional string theory, as well as some of the implications of one of these schemes for string cosmology. The first half of this work begins with a brief overview of cosmology and goes through constructing and then analyzing …
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Uniform sigma frames and the cozero part of uniform frames
… the uniform cozero part. For example, the Samuel compactification of a separable uniform frame can be obtained via the Samuel compactification (in the sigma frame sense) of the underlying cozero part of the uniform frame. Throughout the thesis, choice principles such as the axioms of choice and …
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Birational geometry of the space of rational curves in homogeneous varieties
… spaces, with a focus on the quasi-map compactification induced by the Quot and Hyperquot functors. We first study the birational geometry of the Quot scheme of sheaves on P1 via techniques from the Mori program, explicitly describing its associated cones of ample and effective divisors …
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Obstacles to realizing Quintessence from String Theory
… the construction of quintessence models by flux compactification of type IIB string theory. We focus on Kähler moduli as candidates for the quintessence field and briefly comment on other approaches. The large hierarchies required for simultaneously describing quintessence and the standard model …
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The standard model in 5D : theoretical consistency and experimental constraints
… subspace, the usual Minkowski space. After compactification on an S^1/Z_2 orbifold, an effective four-dimensional theory is obtained where towers of Kaluza-Klein (KK) modes, in addition to the standard model fields, reflect the higher-dimensional structure of space-time. The models are …
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