On value-relations, functional relations and singularities of Mordell-Tornheim and related triple zeta-functions
On value-relations, functional relations and singularities of Mordell-Tornheim and related triple zeta-functions
复制标题
DOI:
10.4064/aa132-2-1
复制
发表时间:
2008-08
期刊:
影响因子:
0.7
通讯作者:
Kohji Matsumoto;Takashi Nakamura;Hiroyuki Ochiai;Hirofumi Tsumura
中科院分区:
文献类型:
--
作者:
Kohji Matsumoto;Takashi Nakamura;Hiroyuki Ochiai;Hirofumi Tsumura
was defined by the first-named author (see [5, 8]). It can be meromorphically continued to the whole space Cr+1, and possible singularities of (1.1) can be explicitly determined (see [8, Theorem 1]). In the 1950’s, Tornheim considered the double series ζMT,2(p, q; r) (p, q, r ∈ N), and gave some fascinating formulas (see [16]). A little later, Mordell independently studied the values ζMT,2(k, k; k) (k ∈ N), and showed that ζMT,2(2p, 2p; 2p) can be written as Mp · π6p for some constant Mp ∈ Q (p ∈ N) (see [11]). About 30 years later, Subbarao and Sitaramachandrarao gave an evaluation formula for ζMT,2(2p, 2p; 2p) ([14]). Then Zagier [22] proved the following simple formula: