Function is_root_of_unity 

pub fn is_root_of_unity<R: RingStore>(ring: R, el: &El<R>, n: usize) -> bool

Available on crate feature unstable-enable only.

Availability

This API is marked as unstable and is only available when the unstable-enable crate feature is enabled. This comes with no stability guarantees, and could be changed or removed at any time.