Mathematics - The MathWorks - #51

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Text version of the page
Eigenvalues
Eigenvalues
In this section...
"Eigenvalue Decomposition" on page 1-41 "Multiple Eigenvalues" on page 1-42 "Schur Decomposition" on page 1-44
Eigenvalue Decomposition
An eigenvalue and eigenvector of a square matrix A are, respectively, a scalar A and a nonzero vector v that satisfy
Av = Xv
With the eigenvalues on the diagonal of a diagonal matrix A and the corresponding eigenvectors forming the columns of a matrix V,you have
AV = VA
If V is nonsingular, this becomes the eigenvalue decomposition
A = VAV'
A good example is provided by the coefficient matrix of the ordinary differential equation in the previous section:
A =
0
CO
-1
6
2
-16
-5
20
-10
The statement
lambda = eig(A)
produces a column vector containing the eigenvalues. For this matrix, the eigenvalues are complex:
1-41

pageCatalog pdf di En 2012-06-22-01