- #1
Benny
- 584
- 0
Hi I am unsure about stability of fixed points here is an example.
[tex]
x_{n + 1} = x_n
[/tex]
There are fixed points at x = 0 and x = 1. In general when talking about difference equations and whether a fixed point is stable or unstable, does this refer to points in a neighbourhood of those points? For example if for some difference equation there is a fixed point at x = 0.12345678, and it is unstable. Does this mean that if I repeatedly 'apply' the recurrence relation(an example is the one I provided although it probably isn't the best example for my question) to a point near that fixed point for example x = 0.12, then successive values that I obtain will 'diverge' from the initial value of 0.12?
I just wanted to check because I need to know this in order to complete my assignment. The assignment questions I have are completely different to my example. Basically I just need to verify that I have the correct definition for 'stable' and 'unstable' fixed points for a recurrence relation. Any help appreciated.
[tex]
x_{n + 1} = x_n
[/tex]
There are fixed points at x = 0 and x = 1. In general when talking about difference equations and whether a fixed point is stable or unstable, does this refer to points in a neighbourhood of those points? For example if for some difference equation there is a fixed point at x = 0.12345678, and it is unstable. Does this mean that if I repeatedly 'apply' the recurrence relation(an example is the one I provided although it probably isn't the best example for my question) to a point near that fixed point for example x = 0.12, then successive values that I obtain will 'diverge' from the initial value of 0.12?
I just wanted to check because I need to know this in order to complete my assignment. The assignment questions I have are completely different to my example. Basically I just need to verify that I have the correct definition for 'stable' and 'unstable' fixed points for a recurrence relation. Any help appreciated.