# Functions on the Spectrum

1. Sep 8, 2010

### navigator

Hey,
While reading V.I.Danilov's book, "Algebraic curves, algebraic manifolds, and schemes", I get stuck on page 284 about the figure illustrating below. It illustrates the numbers 3, 5 and 6 as functions on SpecZ. But according to my understanding, I think the figure has a minor error, since the function of 5 at (2) would take value to 1 (for $$5\equiv 1(mod 2)$$), while the book depictes the value as 0, is it wrong? I am not sure about that. I hope someone would confirm or deny my opinion.

[PLAIN]http://stashbox.org/996759/Spec.jpg [Broken]

Last edited by a moderator: May 4, 2017