For a prime number l, we consider l-extensions k(S) of number fields k unramified outside a finite set S subset of S-l of places of k, and we study the Z(l)-rank of the abelian part of k(S)/k and the number of relations of the Galois group G(S) := Gal(k(S)/k). (C) 2002 Elsevier Science (USA).
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Univ Massachusetts, Dept Math & Stat, 710 N Pleasant St, Amherst, MA 01003 USAUniv Massachusetts, Dept Math & Stat, 710 N Pleasant St, Amherst, MA 01003 USA
Hajir, Farshid
Maire, Christian
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Univ Bourgogne Franche Comte, FEMTO ST Inst, CNRS, 15B Ave Montboucons, F-25000 Besancon, FranceUniv Massachusetts, Dept Math & Stat, 710 N Pleasant St, Amherst, MA 01003 USA
Maire, Christian
Ramakrishna, Ravi
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Cornell Univ, Dept Math, 310 Malott Hall, Ithaca, NY 14853 USAUniv Massachusetts, Dept Math & Stat, 710 N Pleasant St, Amherst, MA 01003 USA