TITLE: Casorati matrix
QUESTION [5 upvotes]: Does anyone know what the Casorati matrix is?
I read that the Casorati matrix is useful in the study of linear difference equations. However, I couldn't find what the Casorati matrix is.
Any help?

REPLY [2 votes]: It looks like Wronskian:
https://en.wikipedia.org/wiki/Wronskian
, but it takes differences instead of differentiation:
http://mathworld.wolfram.com/Casoratian.html
.
Up to my feeling (I'll check it later), the proof of that Casoratian is non-zero for linear independent LRR is almost the same that Wronskian is non-zero for linear independent LDE.
(upd: Looks like my answer mostly repeats Marco's answer. The only benefit is the two links. However, fill free to ask to remove it.)