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// PG 594
A = [101 -90;110 -98]
[n,m] = size(A)
if m<>n then
error('eigenvectors - matrix A is not square');
abort;
end;
lam = spec(A)' //Eigenvalues of matrix A
// A+E = [101-e -90-e;110 -98]
// Let e = 0.001
e = 0.001;
// Let A+E = D
D = [101-e -90-e;110 -98]
[n,m] = size(D)
if m<>n then
error('eigenvectors - matrix D is not square');
abort;
end;
lam = spec(D)' //Eigenvalues of matrix A
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