Sands, Jonathan W. Two cases of Stark’s conjecture. (English) Zbl 0554.12006 Math. Ann. 272, 349-359 (1985). Stark has conjectured the existence of an element in the number field \(K\) whose absolute values at infinite primes provide the evaluation of first derivatives at \(s=0\) of \(L\)-functions for an abelian extension \(K/k\). We first prove this conjecture with some basic class field theory for the case of a tame multiquadratic extension \(K/k\). Then, after Shintani, we consider the case when \(k\) is real quadratic and \(K\) is quadratic over an absolutely abelian field. Using Stark’s work, we improve Shintani’s result by proving the conjecture as stated above. That these two cases held promise was suggested in a paper of Tate. Reviewer: Jonathan W. Sands Cited in 1 ReviewCited in 6 Documents MSC: 11R42 Zeta functions and \(L\)-functions of number fields Keywords:Stark conjecture; derivatives at \(s=0\); L-functions; tame multi-quadratic extension PDFBibTeX XMLCite \textit{J. W. Sands}, Math. Ann. 272, 349--359 (1985; Zbl 0554.12006) Full Text: DOI EuDML References: [1] Sands, J.W.: Abelian fields and the Brumer-Stark conjecture. Compos. Math.53, 337-346 (1984) · Zbl 0552.12007 [2] Sands, J.W.: Galois groups of exponent two and the Brumer-Stark conjecture. J. Reine Angew. Math.349, 129-135 (1984) · Zbl 0521.12009 · doi:10.1515/crll.1984.349.129 [3] Shintani, T.: On certain ray class invariants of real quadratic fields. J. Math. Soc. Japan30, 139-167 (1978) · Zbl 0392.12009 · doi:10.2969/jmsj/03010139 [4] Stark, H.M.:L functions ats=1. IV. First derivatives ats=0. Adv. Math.36, 197-235 (1980) · Zbl 0475.12018 · doi:10.1016/0001-8708(80)90049-3 [5] Tate, J.: On Stark’s conjectures on the behavior ofL(s,?) ats=0. J. Fac. Sci. Univ. Tokyo Sect. IA28, 963-978 (1982) · Zbl 0514.12013 [6] Tate, J.: Les conjectures de Stark sur les fonctionsL d’Artin ens=0; notes d’un cours à Orsay rédigees par D. Bernardi et N. Schappache. Boston, Basel, Stuttgart: Birkhäuser 1984 · Zbl 0545.12009 This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.