Changes

==Description==

==Description==

*This function returns the matrix of order 3 with the property of signature matrix.

*This function returns the matrix of order 3 with the property of signature matrix.

*A signature matrix  is a diagonal elements are <math>\pm</math>  

*A signature matrix  is a diagonal elements are <math>\pm 1</math>  

*So signature matrix is of the form:  

*So signature matrix is of the form:  

<math>\begin{pmatrix}

<math>\begin{pmatrix}