Question

b) Estimate the eigenvalues of the matrix 

\begin{bmatrix} 1 &-2 &3 \\6 &-13 &18 \\4 &-10 &14 \end{bmatrix}

using the Gershgorin bounds. Draw a rough sketch of the region where the eigenvalues lie.

12 Mar 2024
Answer :
Word Count : 401
To estimate the eigenvalues of the matrix using Gershgorin bounds, we will first define the matrix: \[ A = \begin{bmatrix} 1 & -2 & 3 \\ 6 & -13 & 18 \\ 4 & -10 & 14 \end{bmatrix} \] ### Step 1: Gershgorin Circle Theorem The Gershgorin Circle Theorem provides bounds for the eigenvalues of a matrix. For each row of the matrix, a circle in the complex plane is drawn, with its center at the diagonal entry and its radius as the sum of the absolute values of the non-diagonal entries in that row. For the \(i\)-th row, the _____ __________ ________ _______ ____ _______ _________ ______ _________ _____ ______ ___.
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