description:
iscyceq = NCisCycEq(f,g) checks whether polynomials f and g are cyclically equivalent, i.e., whether f - g is a sum of commutators.
arguments:
f and g are NCpolys representing the polynomials. If the function is called with only one parameter, g is assumed to be 0. That is, NCisCycEq(f) checks whether f is a sum of commutators .
output:
iscyceq equals 1 if polynomials f and g are cyclically equivalent and 0 otherwise
possible usage:
NCisCycEq(f,g), NCisCycEq(f)
example:
>> NCisCycEq(x^2*y*x+y*x^3,2*x*y*x^2)
ans = 1