“…The condition (1.4) was applied in [6] for the approximation of analytic functions by shifts ζ(s + iγ k h), in [30] for shifts ζ(s + iγ n h, α) and by shifts (ζ(s + iγ k h), ζ(s + iγ k h, α))) in [21]. In [4,5], in place of (1.4), the Riemann hypothesis was used. The paper [26] is devoted to joint approximation of analytic functions by shifts of Dirichlet L-functions L(s + iγ k h, χ 1 ), ..., L(s + iγ k h, χ r ) also by using (1.4).…”