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Tridiagonal matrix
Matrix with nonzero elements on the main diagonal and the diagonals above and below it
Tridiagonal matrix
In linear algebra, a tridiagonal matrix is a band matrix that has nonzero elements only on the main diagonal, the subdiagonal/lower diagonal (the first diagonal below this), and the supradiagonal/upper diagonal (the first diagonal above the main diagonal). For example, the following matrix is tridiagonal: ( 1 4 0 0 3 4 1 0 0 2...
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