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 4 of 4 for “"Vertex operator algebras"”.
-
Representations of vertex operator algebras and superalgebras
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1995.
-
On Vertex Operator Algebras of Affine Type at Admissible Levels
… structure and representation theory of simple vertex operator algebras (VOAs) of affine type at admissible levels. To do this, it is crucial to obtain knowledge of the singular vectors which generate the maximal submodules, with respect to which these VOAs appear as irreducible quotients, and …
-
Modular invariance for vertex operator superalgebras
… theorem on modular invariance of characters of vertex operator algebras (VOAs) to the setting of vertex operator superalgebras (VOSAs) with rational, rather than integer, conformal weights. To recover SL₂ (Z)-invariance, it turns out to be necessary to consider characters of twisted modules. …
-
Forbidden Substructures in Graphs and Trigraphs, and Related Coloring Problems
… of perfect graphs. The bull is a five-vertex graph consisting of a triangle and two vertex-disjoint pendant edges; a graph is said to be bull-free provided that no induced subgraph of it is a bull. The first result of this thesis is a structure theorem for bull-free perfect graphs. This …