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Explicit Upper Bounds for Residues of Dedekind Zeta Functions and Values of L-Functions at s = 1, and Explicit Lower Bounds for Relative Class Numbers of CM-Fields
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- Journal:
- Canadian Journal of Mathematics / Volume 53 / Issue 6 / 01 December 2001
- Published online by Cambridge University Press:
- 20 November 2018, pp. 1194-1222
- Print publication:
- 01 December 2001
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- Article
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We provide the reader with a uniform approach for obtaining various useful explicit upper bounds on residues of Dedekind zeta functions of numbers fields and on absolute values of values at
$s=1$ of 
$L$-series associated with primitive characters on ray class groups of number fields. To make it quite clear to the reader how useful such bounds are when dealing with class number problems for CM-fields, we deduce an upper bound for the root discriminants of the normal CM-fields with (relative) class number one.
