'Returns ``True`` if ``f`` is a square-free polynomial.
Examples
>>> from sympy import Poly
>>> from sympy.abc import x
>>> Poly(x**2 - 2*x + 1, x).is_sqf
False
>>> Poly(x**2 - 1, x).is_sqf
True'

@property
def is_sqf(f):

    return f.rep.is_sqf
