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

/* code_begins */

{{{
A = matrix([[ 1,1],[2,2]])
print A
B = matrix([[ -1,1],[1,-1]])
print B
print A * B
print A * B == 0
}}}

/* code_ends */

 * '''Solution by''': 
   * <s.n.v.sainadh,student,vycet>