Exponentially distributed eigenvalues
in (-0.5,-0.1]
Original matrix A of order 200
Find eigenvalues in interval (-0.50, -0.10]
(0)
Current subproblem after reduction to tridiagonal form
Reduce band back to tridiagonal whenever larger than 20
(1)
Current subproblem after iteration #1 (band = 7)
Theoretical bandgrowth shown in red
(2)
Current subproblem after iteration #2 (band = 26)
Theoretical bandgrowth shown in red
(3)
Current subproblem after band reduction
Reduce band back to tridiagonal whenever larger than 2
(4)
Current subproblem after iteration #3 (band = 7)
Theoretical bandgrowth shown in red
(5)
Current subproblem after iteration #4 (band = 21)
Theoretical bandgrowth shown in red
(6)
Current subproblem after band reduction
Reduce band back to tridiagonal whenever larger than 20
(7)
Current subproblem after iteration #5 (band = 3)
Theoretical bandgrowth shown in red
(8)
After 18 iterations, current subproblem has converged
Theoretical bandgrowth shown in red
(9)
Matrix A after divide #1 (subproblems of order 193 and 7)
Find eigenvalues in interval (-0.50, -0.10]
(10)
Matrix A after divide #2 (subproblems of order 176 and 17)
Find eigenvalues in interval (-0.50, -0.10]
(11)
Matrix A after divide #3 (subproblems of order 9 and 8)
Find eigenvalues in interval (-0.50, -0.10]
(12)
Matrix A after divide #4 (subproblem of order 8)
Subproblems smaller than 11 solved directly using LAPACK
(13)
Matrix A after divide #5 (subproblem of order 9)
Subproblems smaller than 11 solved directly using LAPACK
(14)
Eigenvalues of A (order N = 200)
There were 17 eigenvalue(s) found in (-0.50, -0.10]
(15)