how to define Skew Polynomial Ring in x over Cyclotomic Field of order 7 and degree 6 twisted by zeta7 |--> zeta7^2 when i execute those commands
K = CyclotomicField(7)
sigma = K.hom([K.gen()^2])
S.< x > = K['x',sigma]
I have this message error
AssertionError: coercion from Cyclotomic Field of order 7 and degree 6 to Skew Polynomial Ring in x over Cyclotomic Field of order 7 and degree 6 twisted by zeta7 |--> zeta7^2 already registered or discovered
