Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"superstrings"”.
-
Superstrings in Four Dimensions
… open (type I) as well as the closed (type II) superstrings introduce supersymmetry into the theory, and this reduces the critical dimension from 26 down to 10. The type I superstring is N=1 supersymmetric, whereas the type II string is N=2. The E<sub>8</sub> x E<sub>8</sub> and …
-
Constant composition deletion correcting codes
… property: for any string, the number of superstrings of a particular length depends only on the length of the original string. We generalize this property to take compositions into account: for any string, the number of superstrings of a particular composition depends only on the …
-
On the geometry of the Strominger system
… the geometry of compactifications of heterotic superstrings with flux. Mathematically it can be viewed as a generalization of Ricci-flat metrics on non-Kshler Calabi-Yau 3- folds. In this thesis, I will present some explicit solutions to the Strominger system on a class of noncompact Calabi-Yau …
-
Computational genomics : mapping, comparison, and annotation of genomes
… on the theoretical problem of finding minimum superstrings of hypergraphs, a combinatorial problem motivated by physical mapping. We also present a statistical and simulation study of "walking with clone-end sequences", an important method for sequencing a large genome.
-
Gravitational Waves in String Cosmology
… brane-antibrane inflation is a network of cosmic superstrings, where the background evolution induces variations of the string tension. We argue that the network dynamics features a scaling attractor and compute the associated gravitational wave spectrum. The spectrum can explain the signal …
-
On the super Mumford form in the presence of Ramond and Neveu-Schwarz punctures
We generalize the result of Voronov (1988) to give an expression for the super Mumford form on the moduli spaces of super Riemann surfaces with Ramond and Neveu–Schwarz punctures. In the Ramond case we take the number of punctures to be large compared to the genus. We consider for the case of …