Array elements that are divisors of zero
TF = isdivisor(X, tol)
isdivisor(X, tol) returns logical 1 (true) for array elements that are divisors of zero. This function works for quaternions and octonions (the reference below covered only the former, but the results hold for octonions).
The second parameter specifies a tolerance. If omitted the default is eps. The tolerance parameter is ignored if X is symbolic.