Talk:Duplication and elimination matrices

Uniqueness of elimination matrix
The elimination matrix is not unique. A general parameterization of the 2x2 elimination matrix is given by $$\begin{bmatrix} 1&0&0&0 \\ 0&1-t&t&0 \\ 0&0&0&1 \end{bmatrix} $$ where t is any scalar. A reasonable choice is, for instance, t = 1/2. — Preceding unsigned comment added by Offsure (talk • contribs) 11:49, 1 December 2016 (UTC)