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

/* code_begins */

{{{
a = var('a')
b= var('b')
c=var('c')
d=var('d')
A = matrix([[a, b],[c, d]])
print A
print "-----------------"
print "let "
B = matrix([[1,1],[1,1]])
print B,
print " be B"
C = A*B
D = B*A
print "------------------"
print D
print " = BA"
print C
print " = AB"
print " for AB=BA, a=d and b=c should be true."
}}}

/* code_ends */

 * '''Solution by''': 
   * Ch.Sandeep, student, GITAM University
   * V.VIshnu Sarma, student, GITAM University