Talk:List of named matrices

let's have more than a dumb list -- a little on what these are & why they are interesting. Examples would be even better, but I suspect TeX in a list will look lousy -- Tarquin 11:26 Mar 9, 2003 (UTC)

I am looking for the name of a 0-1 matrix A with the specification: $i<j\Leftrightarrow A(i-1,j)\leq A(i,j)\leq A(i,j-1)$ where $i$ iterates over the rows and $j$ over the columns. The matrix has 1s around the main diagonal and 0s in the LL and UR corners, yet the tube of ones does not have to be as regular as in e.g. a tridiagonal 0-1 matrix. Can anybody help me? --Johannes Hüsing 13:35, 2 Feb 2005 (UTC)

Change in layout

I've added quite a few new matrices and matrix descriptions over the past few days, but during the process it became clear that there is still a lot of cleanup required here. There are effectively duplicates still in the list - e.g. transition matrix and stochastic matrix. This is obviously not a bad thing - but the duplicates are not marked up as such. Also there are still a few matrices without descriptions.

The other thing I've done is to separate out the non-matrices, e.g. Wronskian, "Row echelon form" etc, as these aren't strictly matrices so didn't seem appropriate to the list. It may be worthwhile reconsidering this document more as a matrix/linear algebra glossary - in which case it would be well worthwhile expanding the "other matrix terms" section I added at the end.

Hopefully this helps take things a little farther toward Tarquin's vision of "more than a dumb list". I also hope that nobody feels their toes have been stepped on!

Dan Pope 20:05, 6 November 2006 (UTC)[reply]

I've just finished the matrix descriptions, and moved 'overlap matrix' to the science/engineering section. However, I'm not convinced that overlap matrices are used only in this context - they look too fundamental, and potentially very useful for a wide range of applications. If anyone has any knowledge of this, please alter the link, description and/or "overlap matrix" article if necessary! Dan Pope 21:02, 6 November 2006 (UTC)[reply]