Function: polsylvestermatrix
Section: polynomials
C-Name: sylvestermatrix
Prototype: GG
Help: polsylvestermatrix(x,y): forms the sylvester matrix attached to the
two polynomials x and y. Warning: the polynomial coefficients are in
columns, not in rows.
Doc: forms the Sylvester matrix
corresponding to the two polynomials $x$ and $y$, where the coefficients of
the polynomials are put in the columns of the matrix (which is the natural
direction for solving equations afterwards). The use of this matrix can be
essential when dealing with polynomials with inexact entries, since
polynomial Euclidean division doesn't make much sense in this case.