• is the order of the arrowhead matrix.

## Description

• This function returns the matrix with the type arrowhead.
• In mathematical, a square matrix containing zeros in all entries except for the first row first column and main diagonal.
• i.e., The matrix of the form

A=

• So Calci displays, the elements of the arrowhead matirx are 1 except 1st row and column and main diagonal.
• The matrix has the form Any symmetric permutation of the arrowhead matrix, where P is a permutation matrix is a arrowhead matrix.
• i.e., where P is a permutation matrix is a arrowhead matrix.
• Real symmetric arrowhead matrices are often an essential tool for the computation of the eigenvalues