I know $\Phi_{105}(x)$ has a 2 and $\Phi_{210}(x)$ has a -2 as a coefficient
Asked
Active
Viewed 33 times
2
-
3There is a short proof of this here: https://projecteuclid.org/euclid.pja/1195513653 – Erick Wong Oct 10 '19 at 19:46