` to instance of kind ``Poly`` or map
  between ``domain`` and ``window``

Calculus
--------
- ``p.deriv()`` -- Take the derivative of ``p``
- ``p.integ()`` -- Integrate ``p``

Validation
----------
- ``Poly.has_samecoef(p1, p2)``   -- Check if coefficients match
- ``Poly.has_samedomain(p1, p2)`` -- Check if domains match
- ``Poly.has_sametype(p1, p2)``   -- Check if types match
- ``Poly.has_samewindow(p1, p2)`` -- Check if windows match

Misc
----
- ``p.linspace()`` -- Return ``x, p(x)`` at equally-spaced points in ``domain``
- ``p.mapparms()`` -- Return the parameters for the linear mapping between
  ``domain`` and ``window``.
- ``p.roots()``    -- Return the roots of `p`.
- ``p.trim()``     -- Remove trailing coefficients.
- ``p.cutdeg(degree)`` -- Truncate p to given degree
- ``p.truncate(size)`` -- Truncate p to given size

é