Congruences for L-Functions

In [Hardy and Williams, 1986] the authors exploited a very simple idea to obtain a linear congruence involving class numbers of imaginary quadratic fields modulo a certain power of 2. Their congruence provided a unified setting for many congruences proved previously by other authors using various means. The Hardy-Williams idea was as follows. Let d be the discriminant of a quadratic field. Suppose that d is odd and let d = PIP2· . . Pn be its unique decomposition into prime discriminants. Then, for any positive integer k coprime with d, the congruence holds trivially as each Legendre-Jacobi-Kronecker symbol (~) has the value + 1 or -1. Expanding this product gives ~ eld e:=l (mod4) where e runs through the positive and negative divisors of d and v (e) denotes the number of distinct prime factors of e. Summing this congruence for o k Idl/8, gcd(k, d) = 1, gives ~ (-It(e) ~ (~) =:O(mod2n). eld o

List of contents

I. Short Character Sums.- II. Class Number Congruences.- III. Congruences between the Orders of K2-Groups.- IV Congruences among the Values of 2-Adic L-Functions.- V. Applications of Zagier's Formula (I).- VI. Applications of Zagier's Formula (II).- Author Index.- List of symbols.

Product details

• Authors: J. Urbanowicz, K. Williams, Kenneth S. Williams
• Publisher: Springer Netherlands
• Languages: English
• Product format: Hardback
• Released: 26.06.2009
• EAN: 9780792363798
• ISBN: 978-0-7923-6379-8
• No. of pages: 256
• Weight: 567 g
• Illustrations: XII, 256 p.
• Series: Mathematics and Its Applications; Mathematics and Its Applications
• Subject: Natural sciences, medicine, IT, technology > Mathematics > Arithmetic, algebra