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- From: androula@aliphatic.ecn.purdue.edu (Ioannis Androulakis)
- Newsgroups: sci.math.num-analysis
- Subject: Linearization
- Message-ID: <1992Aug31.180227.21268@noose.ecn.purdue.edu>
- Date: 31 Aug 92 18:02:27 GMT
- Sender: news@noose.ecn.purdue.edu (USENET news)
- Organization: Purdue University Engineering Computer Network
- Lines: 33
-
-
- Given a system of nonlinear difference equations,
-
- x(k+1) = F ( x(k), y(k-1) )
- y(k+1) = G ( x(k-1), y(k) )
-
- I would like to perform some kind of linear stability
- analysis around the point (x*, y*).
- I believe that the only way to do so is by augmenting
- the system, while introducing two more variables
- z(k) and w(k) so that the augmented systems looks like :
-
- x(k+1) = F ( x(k), z(k) )
- y(k+1) = G ( w(k), y(k) )
- z(k+1) = y(k)
- w(k+1) = x(k)
-
- Now I can linearize and study the stability behavior of
- the linearized systems around (x*, y*). In other words
- before I proceed to the linearization I must have my
- indices such that my equations read :
-
- L.H.S. (k+1) = R.H.S (k).
-
- Any comments on such an approach ? Any references would
- be appreciated.
- Thank you,
- ioannis
-
- androula@ecn.purdue.edu
-
- p.s. Similar arguments hold for larger delayed arguments
- as well.
-