Results 1  10
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33
Extreme values of Artin Lfunctions and class numbers
 Compositio Math
"... Assuming the GRH and Artin conjecture for Artin Lfunctions, we prove that there exists a totally real number field of any fixed degree (> 1) with an arbitrarily large discriminant whose normal closure has the full symmetric group as Galois group and whose class number is essentially as large as pos ..."
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Cited by 9 (1 self)
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Assuming the GRH and Artin conjecture for Artin Lfunctions, we prove that there exists a totally real number field of any fixed degree (> 1) with an arbitrarily large discriminant whose normal closure has the full symmetric group as Galois group and whose class number is essentially as large as possible. One ingredient is an unconditional construction of totally real fields with small regulators. Another is the existence of Artin Lfunctions with large special values. Assuming the GRH and Artin conjecture it is shown that there exist an Artin Lfunctions with arbitrarily large conductor whose value at s = 1 is extremal and whose associated Galois representation has a fixed image, which is an arbitrary nontrivial finite irreducible subgroup of GL(n, C) with property GalT. 1 Class numbers of number fields. Let K be a number field whose group of ideal classes has size h, called the class number of K. As K ranges over some natural family, it is interesting to
The square sieve and the Lang–Trotter conjecture
 Canadian Journal of Mathematics
, 2001
"... 1 Let E be an elliptic curve defined over Q and without complex multiplication. Let K be a fixed imaginary quadratic field. We find nontrivial upper bounds for the number of ordinary primes p ≤ x for which Q(πp) = K, where πp denotes the Frobenius endomorphism of E at p. More precisely, �under a ce ..."
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Cited by 9 (3 self)
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1 Let E be an elliptic curve defined over Q and without complex multiplication. Let K be a fixed imaginary quadratic field. We find nontrivial upper bounds for the number of ordinary primes p ≤ x for which Q(πp) = K, where πp denotes the Frobenius endomorphism of E at p. More precisely, �under a certain generalized Riemann hypothesis we show that this number is OE x 17 18 log x, and unconditionally. We also prove that the number we show that this number is OE,K � 13 x(log log x) 12 (log x) 25 24 of imaginary quadratic fields K, with − disc K ≤ x and of the form K = Q(πp), is ≫E log log log x for x ≥ x0(E). These results represent progress towards a 1976 LangTrotter conjecture. 1
On Smooth Ideals in Number Fields
 J. Number Theory
, 1993
"... For y 2 IR ?0 an integral ideal of an algebraic number field F is called ysmooth if the norms of all of its prime ideal factors are bounded by y. Assuming the generalized Riemann hypothesis we prove a lower bound for the number /F (x; y) of integral ysmooth ideals in F whose norms are bounded ..."
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Cited by 7 (0 self)
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For y 2 IR ?0 an integral ideal of an algebraic number field F is called ysmooth if the norms of all of its prime ideal factors are bounded by y. Assuming the generalized Riemann hypothesis we prove a lower bound for the number /F (x; y) of integral ysmooth ideals in F whose norms are bounded by x 2 IR ?0 . Apart from x and y this bound only depends on the degree of F . 1 Introduction and result Let F be an algebraic number field of discriminant \Delta F . For y 2 IR ?0 an integral ideal of F is called ysmooth if the norms of all of its prime ideal factors are bounded by y. The number of integral ysmooth ideals of F whose norms do not exceed x 2 IR ?0 is denoted by /F (x; y). In this paper we prove the following result. 1. Theorem Assume that the Generalized Riemann Hypothesis (GRH) is correct. For any n 2 IN and for any ffl 2 IR ?0 there is an effectively computable constant x 0 (ffl; n) 2 IR ?0 such that for any x; y 2 IR ?0 with x ? x 0 (ffl; n) and for every algebra...
Infinite Global Fields and the Generalized Brauer–Siegel Theorem
 Moscow Math. J
"... To our teacher Yu.I.Manin on the occasion of his 65th birthday Abstract. The paper has two purposes. First, we start to develop a theory of infinite global fields, i.e., of infinite algebraic extensions either of Q or of Fr(t). We produce a series of invariants of such fields, and we introduce and s ..."
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Cited by 6 (2 self)
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To our teacher Yu.I.Manin on the occasion of his 65th birthday Abstract. The paper has two purposes. First, we start to develop a theory of infinite global fields, i.e., of infinite algebraic extensions either of Q or of Fr(t). We produce a series of invariants of such fields, and we introduce and study a kind of zetafunction for them. Second, for sequences of number fields with growing discriminant we prove generalizations of the Odlyzko–Serre bounds and of the Brauer–Siegel theorem, taking into account nonarchimedean places. This leads to asymptotic bounds on the ratio log hR / log √ D  valid without the standard assumption n / log √ D  → 0, thus including, in particular, the case of unramified towers. Then we produce examples of class field towers, showing that this assumption is indeed necessary for the Brauer–Siegel theorem to hold. As an easy consequence we ameliorate on existing bounds for regulators. 2000 Math. Subj. Class. 11G20, 11R37, 11R42, 14G05, 14G15, 14H05 Key words and phrases. Global field, number field, curve over a finite field, class number, regulator, discriminant bound, explicit formulae, infinite global field, Brauer–Siegel theorem 1
On The Exceptional Zeros Of RankinSelberg LFunctions
, 2003
"... Introduction In this paper we study the possibility of real zeros near s = 1 for the RankinSelberg Lfunctions L(s, f g) and L(s, sym 2 (g) sym 2 (g)), where f, g are newforms, holomorphic or otherwise, on the upper half plane H, and sym 2 (g) denotes the automorphic form on GL(3)/Q asso ..."
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Cited by 6 (2 self)
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Introduction In this paper we study the possibility of real zeros near s = 1 for the RankinSelberg Lfunctions L(s, f g) and L(s, sym 2 (g) sym 2 (g)), where f, g are newforms, holomorphic or otherwise, on the upper half plane H, and sym 2 (g) denotes the automorphic form on GL(3)/Q associated to g by Gelbart and Jacquet ([GJ79]). We prove that the set of such zeros of these Lfunctions is the union of the corresponding sets for L(s, #) with # a quadratic Dirichlet character, which divide them. Such a divisibility does not occur in general, for example when f, g are of level 1. When f is a Maass form for SL(2,<
CMFIELDS WITH RELATIVE CLASS NUMBER ONE
, 2005
"... We will show that the normal CMfields with relative class number one are of degrees ≤ 216. Moreover, if we assume the Generalized Riemann Hypothesis, then the normal CMfields with relative class number one are of degrees ≤ 96, and the CMfields with class number one are of degrees ≤ 104. By many ..."
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Cited by 2 (0 self)
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We will show that the normal CMfields with relative class number one are of degrees ≤ 216. Moreover, if we assume the Generalized Riemann Hypothesis, then the normal CMfields with relative class number one are of degrees ≤ 96, and the CMfields with class number one are of degrees ≤ 104. By many authors all normal CMfields of degrees ≤ 96 with class number one are known except for the possible fields of degree 64 or 96. Consequently the class number one problem for normal CMfields is solved under the Generalized Riemann Hypothesis except for these two cases.
On the symmetric powers of cusp forms on GL(2) of icosahedral type
 Int. Math. Res. Not
"... In this Note, we prove three theorems. Throughout, F will denote a number field with absolute Galois group GF = Gal ( ¯ F/F). When ρ is an irreducible continuous 2–dimensional C representation of GF, one says that it is icosahedral, resp. octahedral, resp. tetrahedral, resp. ..."
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Cited by 2 (1 self)
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In this Note, we prove three theorems. Throughout, F will denote a number field with absolute Galois group GF = Gal ( ¯ F/F). When ρ is an irreducible continuous 2–dimensional C representation of GF, one says that it is icosahedral, resp. octahedral, resp. tetrahedral, resp.
GENERALISED MERTENS AND BRAUER–SIEGEL THEOREMS
, 2007
"... In this article, we prove a generalisation of the Mertens theorem for prime numbers to number fields and algebraic varieties over finite fields, paying attention to the genus of the field (or the Betti numbers of the variety), in order to make it tend to infinity and thus to point out the link betwe ..."
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Cited by 2 (1 self)
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In this article, we prove a generalisation of the Mertens theorem for prime numbers to number fields and algebraic varieties over finite fields, paying attention to the genus of the field (or the Betti numbers of the variety), in order to make it tend to infinity and thus to point out the link between it
Brauer–Siegel theorem for elliptic surfaces
 Int. Math. Res. Not. IMRN 2008
"... Abstract. We consider higherdimensional analogues of the classical BrauerSiegel theorem focusing on the case of abelian varieties over global function fields. We prove such an analogue in the case of constant families of elliptic curves. To our teachers V.E. Voskresenskiĭ and Yu.I. Manin to their ..."
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Cited by 2 (0 self)
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Abstract. We consider higherdimensional analogues of the classical BrauerSiegel theorem focusing on the case of abelian varieties over global function fields. We prove such an analogue in the case of constant families of elliptic curves. To our teachers V.E. Voskresenskiĭ and Yu.I. Manin to their 80th and 70th birthdays, respectively 1.