(self)
return not self.is_odd
Checks if a permutation is even.

        Examples
        ========

        >>> from sympy.combinatorics.permutations import Permutation
        >>> p = Permutation([0,1,2,3])
        >>> p.is_even
        True
        >>> p = Permutation([3,2,1,0])
        >>> p.is_even
        True

        See Also
        ========

        is_odd
Checks if a permutation is even.
Checks if a permutation is even .
def is_even(self):
        """
        Checks if a permutation is even.

        Examples
        ========

        >>> from sympy.combinatorics.permutations import Permutation
        >>> p = Permutation([0,1,2,3])
        >>> p.is_even
        True
        >>> p = Permutation([3,2,1,0])
        >>> p.is_even
        True

        See Also
        ========

        is_odd
        """
        return not self.is_odd
def is_even ( self ) : return not self . is_odd