F. Constantinescu et R. Flume, THE CONVERGENCE OF STRONGLY RELEVANT PERTURBATIONS OF D = 2 CONFORMALFIELD-THEORIES, Physics letters. Section B, 326(1-2), 1994, pp. 101-104
Off-critical perturbations of two-dimensional rational conformal field
theories given by scalar primary operators with scaling dimensions sm
aller than (1/2, 1/2) are considered. The Gell-Mann-Low expansion is s
hown to converge in finite volume.