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Linear Algebra and the C Language/a0pj
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Linear discrete dynamical system (eigen)
Let : u_n+1 = a11 u_n + a12 v_n
v_n+1 = a21 u_n + a22 v_n
If you write : (t : transpose)
X_n = [u_n, v_n]t
and then X_n+1 = A X_n
X_n+1 = [u_n+1,v_n+1]t
Let's put X_0 = [u_0,v_0]t
then X_1 = A X_0
X_2 = A X_1 = A^2 X_0
X_3 = A X_2 = A^3 X_0
...
X_n = A^n X_0
Calculate : lim X_n =
n-> oo
For this, we will use eigenvalues and eigenvectors for the first method, and for the second method we will directly calculate the power of A.
Exemple 1 :
c00a.c : Let's calculate the eigenvectors and eigenvalues
c00b.c : Calculate A^P
We will be able to observe that from P = 19, the value of A^P no longer changes.
Exemple 2 :
c00c.c : Let's calculate the eigenvectors and eigenvalues
c00d.c Calculate A^P
We will be able to observe that from P = 17, the value of A^P no longer changes.