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On critical values of twisted Artin L -functions

Peng-Jie Wong (2017)

Czechoslovak Mathematical Journal

We give a simple proof that critical values of any Artin L -function attached to a representation ρ with character χ ρ are stable under twisting by a totally even character χ , up to the dim ρ -th power of the Gauss sum related to χ and an element in the field generated by the values of χ ρ and χ over . This extends a result of Coates and Lichtenbaum as well as the previous work of Ward.

On the k -polygonal numbers and the mean value of Dedekind sums

Jing Guo, Xiaoxue Li (2016)

Czechoslovak Mathematical Journal

For any positive integer k 3 , it is easy to prove that the k -polygonal numbers are a n ( k ) = ( 2 n + n ( n - 1 ) ( k - 2 ) ) / 2 . The main purpose of this paper is, using the properties of Gauss sums and Dedekind sums, the mean square value theorem of Dirichlet L -functions and the analytic methods, to study the computational problem of one kind mean value of Dedekind sums S ( a n ( k ) a ¯ m ( k ) , p ) for k -polygonal numbers with 1 m , n p - 1 , and give an interesting computational formula for it.

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