リーマン予想 - Wikipedia
Borwein, Peter ; Ferguson, Ron; Mossinghoff, Michael J. (2008), “Sign changes in sums of the Liouville function”, Mathematics of Computation 77 (263): 1681–1694, doi : 10.1090/S0025-5718-08-02036-X , MR
de Branges, Louis (1992), “The convergence of Euler products”, Journal of Functional Analysis 10...
ja.wikipedia.org