On the exponent of the ideal class groups of imaginary extensions of $_q(x)$

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Department of Mathematics and Statistics and CICMA, Concordia University, 1455 de Maisonneuve Blvd. West, Montréal, Québec, H3G 1M8, Canada
Dipartimento di Matematica, Terza Università degli Studi di Roma, Via C. Segre, 2/6, 00146 Roma, Italy

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V. K. Murty and J. Scherk, Effective versions of the Chebotarev density theorem for function fields, C. R. Acad. Sci. Paris Sér. I 319 (1994), 523-528.
F. Pappalardi, On the exponent of the ideal class group of ℚ(√-d), Proc. Amer. Math. Soc., to appear.