(self)
return set.union(*[i.free_symbols for i in self])
Returns the free symbols within the matrix.

        Examples
        ========

        >>> from sympy.abc import x
        >>> from sympy.matrices import Matrix
        >>> Matrix([[x], [1]]).free_symbols
        set([x])
Returns the free symbols within the matrix.
Returns the free symbols within the matrix .
def free_symbols(self):
        """Returns the free symbols within the matrix.

        Examples
        ========

        >>> from sympy.abc import x
        >>> from sympy.matrices import Matrix
        >>> Matrix([[x], [1]]).free_symbols
        set([x])
        """

        return set.union(*[i.free_symbols for i in self])
def free_symbols ( self ) : return set . union ( * [ i . free_symbols for i in self ] )