chore(ring_theory/roots_of_unity): primitive roots are not zero (#13587)
chore(ring_theory/roots_of_unity): primitive roots are not zero (#13587)





Co-authored-by: Eric Rodriguez <480064f38bcfd78eaf0148211ef61a38099706aa@users.noreply.github.com>

leanprover-community/mathlib,leanprover-community/mathlib