Summary
The three dimensional polymer measure was first constructed by Westwater in 1980 with a very complicated proof. We give an alternative construction for small coupling parameter which is based on the approach by Brydges-Fröhlich-Sokal in quantum field theory and Bovier-Felder-Fröhlich, using skeleton inequalities. The main new features are the proof of convergence which had been open in the Brydges-Fröhlich-Sokal construction, and the construction of the measure on the space of paths with fixed time length.
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Bolthausen, E. On the construction of the three dimensional polymer measure. Probab. Th. Rel. Fields 97, 81–101 (1993). https://doi.org/10.1007/BF01199313
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DOI: https://doi.org/10.1007/BF01199313