Irrationality of Certain Lambert Series
Irrationality of Certain Lambert Series
复制标题
某些朗伯级数的非理性
DOI:
10.3836/tjm/1244208475
复制
发表时间:
2004
影响因子:
0.6
通讯作者:
Y. Tachiya
中科院分区:
文献类型:
--
作者:
Y. Tachiya
. Let q with | q | > 1 be an integer in an algebraic number field K given below, and { a n } a periodic sequence in K of period two, not identically zero. Let f(q) = (cid:1) ∞ n = 1 a n /( 1 − q n ). We prove that (i) If K is either the rational number field (cid:0) or an imaginary quadratic field, then f(q) / ∈ K . (ii) For an algebraic integer q such that | q | > 1 and | q σ | < 1 for any σ ∈ Aut ( (cid:0) / (cid:0) ) with q σ (cid:3)= q , if k = (cid:0) (q) , then f(q) / ∈ (cid:0) (q) . For example, the three numbers 1 , = 1 are linearly independent over (cid:0) for every q ∈ (cid:1) with | q | ≥ 2 . Further, irrationality results of the special values of the functions (cid:2) , ∞ can be deduced, where a > 0, b ≥ 0 are integers and R n is a certain binary recurrence.