On the Coates–Sinnott Conjecture
On the Coates–Sinnott Conjecture
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关于科茨-辛诺特猜想
DOI:
10.1002/mana.200810802
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
C. Popescu
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文献类型:
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作者:
C. Popescu
In [5], Coates and Sinnott formulated a far reaching conjecture linking the values ΘF/k,S (1 — n) for even integers n ≥ 2 of an S ‐imprimitive, Galois‐equivariant L ‐function ΘF/k,S associated to an abelian extension F/k of totally real number fields to the annihilators over the group ring ℤ[G (F/k)] of the even Quillen K ‐groups K2n–2 (OF) associated to the ring of integers OF of the top field F. In the same paper, Coates and Sinnott essentially prove the ? ‐adic étale cohomological version of their conjecture, in which K2n–2(OF) is replaced by H2 et (OF [1/? ], ℤ(n)), for all primes ? > 2, under the hypothesis that k = ℚ. Refinements of this result for k = ℚ, involving Fitting ideals rather than annihilators of H2et (OF [1/?], ℤ?(n)), were obtained in particular cases by Cornacchia–Østvaer [7] and in general by Kurihara [14]. More recently, Burns and Greither [3] proved the same type of refinements (involving Fitting ideals of étale cohomology groups) for arbitrary totally real base fields k, but working under the very strong hypothesis that the Iwasawa μ ‐invariants μF,? vanish for all odd primes ?. In this paper, we study a class of abelian extensions of an arbitrary totally real base field k including, for example, subextensions of real cyclotomic extensions of type k (ζ p m )+/k, where p is an odd prime. For this class of extensions, we prove similar refinements of the étale cohomological version of the Coates–Sinnott conjecture, under no vanishing hypotheses for the Iwasawa μ‐invariants in question. Our methods of proof are different from the ones employed in [3], [14] and [7]. We build upon ideas developed by Greither in [10] and Wiles in [23] and [22], in the context of Brumer's Conjecture. If the Quillen–Lichtenbaum Conjecture is proved (and a proof seems tobe within reach), then we have canonical ℤ?[G (F/k)]‐module isomorphisms for all n ≥ 2, all i = 1,2, and all primes ? > 2, and all these results will yield proofs of the original K ‐theoretic version of the Coates–Sinnott Conjecture, in the cases and under the various hypotheses mentioned above (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
DOI:
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发表时间:
2003
期刊:
J. fur die reine und angewandte Mathematik 561
影响因子:
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作者:
Masato Kurihara
通讯作者:
Masato Kurihara