Talk:Z function

arg ζ

Riemann-Siegel theta function says θ(x) = arg ζ(½ + t i), so arg (e^{− i θ(x)} ζ(½ + t i)) = 0. If Im Z(x) = 0 as well, we get θ(x) = 0 or θ(x) = π/2. How is that possible?

What Ω means

Z times Ω does not tend to 0, this is true; but it does not imply that sup {Z(t): t < x} is increasing, and that meaning of the symbol Ω is nonstandard. --Yecril (talk) 08:23, 7 October 2008 (UTC)

Quite: usually, an Ω theorem is the negation of the corresponding little-o form -as you say! Also, a product is not involved - it's a quotient of the absolute values - usually! Hair Commodore (talk) 17:24, 10 January 2009 (UTC)