Search for dissertations about: "modular invariance"

Found 3 swedish dissertations containing the words modular invariance.

2. 1. Whatever goes around comes around : modular invariance in string theory and conformal field theory

   Author : Patrick D. Roberts; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; conformal field theory; Kac-Moody algebra; covariant lattice; modular invariance; string theory;

   Abstract : .... READ MORE

4. 2. Bosonic string field theory : operator formulation and string field functional formulation

   Author : Per Sundell; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; string field theory; BRST-invariance; modular invariance; reggeon vertices; master equation; homotopy Lie algebras; sweing of riemann surfaces;

   Abstract : .... READ MORE

5. 3. Admissible transformations and the group classification of Schrödinger equations

   Author : Celestin Kurujyibwami; Peter Basarab-Horwath; Roman Popovych; Pontelis Damianou; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : We study admissible transformations and solve group classification problems for various classes of linear and nonlinear Schrödinger equations with an arbitrary number n of space variables.The aim of the thesis is twofold. READ MORE