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The structures in target space geometry that correspond to conformally invariant boundary conditions in WZW theories are determined both by studying the scattering of closed string states and by… (More)

Symmetry breaking boundary conditions for WZW theories are discussed. We derive explicit formulae for the reflection coefficients in the presence of boundary conditions that preserve only an orbifold… (More)

A formula is presented for the modular transformation matrix S for any simple current extension of the chiral algebra of a conformal field theory. This provides in particular an algorithm for… (More)

We give a general construction of correlation functions in rational con-formal field theory on a possibly non-orientable surface with boundary in terms of 3-dimensional topological quantum field… (More)

- Jan G. Hengstler, Ulrich Bolm-Audorff, +13 authors Franz Oesch
- Carcinogenesis
- 2003

Co-exposure to cadmium, cobalt, lead and other heavy metals occurs in many occupational settings, such as pigment and batteries production, galvanization and recycling of electric tools. However,… (More)

- Jürgen Fuchs, Jan G. Hengstler, G Boettler, Franz Oesch
- International archives of occupational and…
- 1996

The genotoxic effect of occupational exposure to bitumen-based products was determined by the extent of DNA strand breaks and alkali-labile sites of the DNA of peripheral mononuclear blood cells from… (More)

- Jürgen Fuchs, Bert Schellekens, Christoph Schweigert
- 1996

Any automorphism of the Dynkin diagram of a symmetrizable Kac--Moody algebra g induces an automorphism of g and a mapping τω between highest weight modules of g. For a large class of such Dynkin… (More)

We formulate rational conformal field theory in terms of a symmetric special Frobenius algebra A and its representations. A is an algebra in the modular tensor category of Moore--Seiberg data of the… (More)

- Jürgen Fuchs, DESY, Notkestraße
- 1997

We introduce a finite-dimensional algebra that controls the possible boundary conditions of a conformal field theory. For theories that are obtained by modding out a Z2 symmetry (corresponding to a… (More)

- Jürgen Fuchs, Christoph Schweigert, Johannes Walcher
- 2000

In string theory various projections have to be imposed to ensure supersymmetry. We study the consequences of these projections in the presence of world sheet boundaries. A-type boundary conditions… (More)