Abstract
Following 't Hooft we extend the Borel sum and the Watson-Nevanlinna criterion by allowing distributional transforms. This enables us to prove that the characteristic function of the measure of anyg −2 φ 4 finite lattice field is the sum of a power series expansion obtained by fixing exponentially small terms in the coefficients. The same result is obtained for the trace of the double well semigroup approximated by then th order Trotter formula.
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Caliceti, E., Grecchi, V. & Maioli, M. The distributional Borel summability and the large coupling φ4 lattice fields. Commun.Math. Phys. 104, 163–174 (1986). https://doi.org/10.1007/BF01210798
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DOI: https://doi.org/10.1007/BF01210798