= Arrowhead matrix
{wiki=Arrowhead_matrix}
An Arrowhead matrix is a special kind of square matrix that has a particular structure. Specifically, an \\( n \\times n \\) Arrowhead matrix is characterized by the following properties: 1. All elements on the main diagonal can be arbitrary values. 2. The elements of the first sub-diagonal (the diagonal just below the main diagonal) can also have arbitrary values. 3. The elements of the first super-diagonal (the diagonal just above the main diagonal) can also have arbitrary values.
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