(arg)
return C.Pow(arg, C.Rational(1, 3))
This function computes the principial cube root of `arg`, so
    it's just a shortcut for `arg**Rational(1, 3)`.

    Examples
    ========

    >>> from sympy import cbrt, Symbol
    >>> x = Symbol('x')

    >>> cbrt(x)
    x**(1/3)

    >>> cbrt(x)**3
    x

    Note that cbrt(x**3) does not simplify to x.

    >>> cbrt(x**3)
    (x**3)**(1/3)

    This is because the two are not equal to each other in general.
    For example, consider `x == -1`:

    >>> from sympy import Eq
    >>> Eq(cbrt(x**3), x).subs(x, -1)
    False

    This is because cbrt computes the principal cube root, this
    identity does hold if `x` is positive:

    >>> y = Symbol('y', positive=True)
    >>> cbrt(y**3)
    y

    See Also
    ========

    sympy.polys.rootoftools.RootOf, root, real_root

    References
    ==========

    * http://en.wikipedia.org/wiki/Cube_root
    * http://en.wikipedia.org/wiki/Principal_value
This function computes the principial cube root of `arg`, so
    it's just a shortcut for `arg**Rational(1, 3)`.
This function computes the principial cube root of arg so it s just a shortcut for arg ** Rational ( 1 3 ) .
def cbrt(arg):
    """This function computes the principial cube root of `arg`, so
    it's just a shortcut for `arg**Rational(1, 3)`.

    Examples
    ========

    >>> from sympy import cbrt, Symbol
    >>> x = Symbol('x')

    >>> cbrt(x)
    x**(1/3)

    >>> cbrt(x)**3
    x

    Note that cbrt(x**3) does not simplify to x.

    >>> cbrt(x**3)
    (x**3)**(1/3)

    This is because the two are not equal to each other in general.
    For example, consider `x == -1`:

    >>> from sympy import Eq
    >>> Eq(cbrt(x**3), x).subs(x, -1)
    False

    This is because cbrt computes the principal cube root, this
    identity does hold if `x` is positive:

    >>> y = Symbol('y', positive=True)
    >>> cbrt(y**3)
    y

    See Also
    ========

    sympy.polys.rootoftools.RootOf, root, real_root

    References
    ==========

    * http://en.wikipedia.org/wiki/Cube_root
    * http://en.wikipedia.org/wiki/Principal_value

    """
    return C.Pow(arg, C.Rational(1, 3))
def cbrt ( arg ) : return C . Pow ( arg , C . Rational ( 1 , 3 ) )