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- Erhard Seiler, Barry Simon
- 2004

We prove bounds of the form Z Λ ^e a{Λl and (SZ)^^ 1 in the Y 2 Euclidean field theory and from this obtain Glimm's Hamiltonian bound and Schrader's linear lower bound.

- Erhard Seiler
- 2001

We discuss some subtleties in connection with the new attempts to provide a firm basis for ths Witten-Veneziano formula.

WE PROVE THAT FOR ANY TRACE CLASS OPERATORS, [FORMULA: see text].

- Christian Lang, Vladimir Braun, Dirk Brömmel, Tommy Burch, Stefano Capitani, Tom DeGrand +20 others
- 2015

Die Online-Fachbuchhandlung beck-shop.de ist spezialisiert auf Fachbücher, insbesondere Recht, Steuern und Wirtschaft. Im Sortiment finden Sie alle Medien (Bücher, Zeitschriften, CDs, eBooks, etc.) aller Verlage. Ergänzt wird das Programm durch Services wie Neuerscheinungsdienst oder Zusammenstellungen von Büchern zu Sonderpreisen. Der Shop führt mehr als 8… (More)

- Erhard Seiler
- 2008

We comment on the present status, the concepts and their limitations, and the successes and open problems of the various approaches to a relativistic quantum theory of elementary particles, with a hindsight to questions concerning quantum gravity and string theory.

In dimension D ≤ 2 the low temperature behavior of systems enjoying a continuous symmetry is dominated by super-instantons: classical configurations of arbitrarily low energy. Perturbation theory in the background of a super-instanton produces thermodynamic answers for the invariant Green's functions that differ from the standard ones, but only in… (More)

- M. Niedermaier, E. Seiler, P. Weisz
- 2009

Compact (ferro-and antiferromagnetic) sigma-models and noncompact (hy-perbolic) sigma-models are compared in a lattice formulation in dimensions d ≥ 2. While the ferro-and antiferromagnetic models are essentially equivalent , the qualitative difference to the noncompact models is highlighted. The perturbative and the large N expansions are studied in both… (More)

- Erhard Seiler
- 2003

In this talk I give an overview of the work done during the last 15 years in collaboration with the late Adrian Patrascioiu. In this work we accumulated evidence against the commonly accepted view that theories with nonabelian symmetry – either two dimensional nonlinear σ models or four dimensional Yang-Mills theories – have the property of asymptotic… (More)

- Miguel Aguado, Erhard Seiler
- 2005

We discuss the apparent conflict between reflection positivity and pos-itivity of the topological susceptibility in two-dimensional nonlinear sigma models and in four-dimensional gauge theories. We pay special attention to the fact that this apparent conflict is already present on the lattice; its resolution puts some nontrivial restrictions on the… (More)