Abstract
AbstractLet L be a linear differential operator with rational coefficients such that 0 is not an irregular singularity of L and that for sufficiently many p's the equation Lv = 0 has no zero solution mod p. We show that if u is a formal power series whose coefficients are p-adic integers for almost all p and if Lu is rational, then u too is rational.
Publisher
Cambridge University Press (CUP)
Subject
General Mathematics,Statistics and Probability
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