||'''Book'''|| Linear Algebra ||
 ||'''Author'''|| Gilbert Strang ||
 ||'''Edition'''||  ||

/* code_begins */

{{{
A=matrix([[4,2],[1,3]])
print det(A)
print det(A**(-1))
Y=var('y')
k=matrix([[4-y,2],[1,3-y]])
print det(k)
print solve(det(k)==0,y)

}}}

/* code_ends */
 * '''Solution by''': 
   * Swethakumari G, student,SNIST
   * Radha Bhukya, student, SNIST
   * Usha Rani,student, SNIST