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  Congruence among generalized Bernoulli numbers.

Szmidt, J., Urbanowicz, J., & Zagier, D. (1995). Congruence among generalized Bernoulli numbers. Acta Arithmetica, 71(3), 273-278.

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Szmidt, Janusz, Author
Urbanowicz, Jerzy1, Author
Zagier, Don2, Author           
Affiliations:
1Max Planck Society, ou_persistent13              
2Max Planck Institute for Mathematics, Max Planck Society, ou_3029201              

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 Abstract: Let χ denote a primitive quadratic character mod M (or the trivial character) and let d be a fundamental discriminant (or 1). Denote by χ' the character mod M |d | induced by χ. The authors consider the generalized Bernoulli numbers Bm, χ' and the corresponding Bernoulli polynomials Bm, χ' (X) at X = d. From a certain set of these numbers they form an expression P(d,m), too complicated to reproduce here, which is in fact a linear combination (with integer coefficients) of Bm, χ' and Bm, χ' (d), where m is a fixed integer ≥ 1. The expression also depends upon two integral parameters to be chosen under some restrictions. The authors prove that P(d,m) \in 2^h 3^km \bbfZ, where h and k are given nonnegative integers. As a consequence one has a number of divisibility statements for Bm, χ/m and so for the class numbers of quadratic fields. Results of the same type, including special cases of the present result, have previously appeared in several papers [e.g. \it K. Hardy and \it K. S. Williams, Acta Arith. 47, 263-276 (1986; Zbl 0598.12003)].\par The proof involves some clever manipulations related to the series \sum^∞n = 1 χ (n) e^nt.

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 Dates: 1995
 Publication Status: Issued
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 Identifiers: eDoc: 744920
Other: 111
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Title: Acta Arithmetica
Source Genre: Journal
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Publ. Info: Instytut Matematyczny PAN,Warszawa
Pages: - Volume / Issue: 71 (3) Sequence Number: - Start / End Page: 273 - 278 Identifier: ISSN: 0065-1036