978 citations
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Showing 2007 · math-phShow all
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math-ph2007★ 4 cited
On the large N expansion in hyperbolic sigma-models
Max Niedermaier, Erhard Seiler
Invariant correlation functions for hyperbolic sigma-models are investigated. The existence of a large asymptotic expansion is proven on finite lattices of dime…
math-ph2007★ 1 cited
On the Euclidean Version of the Photon Number Integral
S. Ruijsenaars, L. Stodolsky
We reconsider the Euclidean version of the photon number integral introduced in ref 1. This integral is well defined for any smooth non-self-intersecting curve in . Besides s…