||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
A = Matrix([[1,4],[-4,1]])

print A

A.characteristic_polynomial()

A.eigenvalues()

# eigenvalues are imaginary => the matrix is not symmetric

# eigenvalues are not purely imaginary => the matrix is not skew-symmetric

# eigenvalues are complex conjugates with modulii = 1 => the matrix is not orthogonal




}}}

/* code_ends */

 * '''Solution by''': 
  * ganesh, developer, space
  * bhanukiran, student, technical university of Delft
  * saransh, student, sobhit university
  * ujwala, lecturer, aurangabad