Quaternions in Python

[Johann Hibschman]

>>>>> "Erik" == Erik Max Francis <max at alcyone.com> writes:

    Erik> You're missing the point.  Quaternions can behave
    Erik> qualitatively differently from their corresponding matrices.

Eh?  Say you have the Pauli spin matrices (complex 2x2 matrices), how
on earth do those behave qualitatively different from quaternions?  As
far as I can tell, they *are* quaternions.

--Johann