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

/* code_begins */

{{{
var('a,b')
e=matrix([[1,0,0],[a,1,0],[b,0,1]])
print e
var('c')
f=matrix([[1,0,0],[0,1,0],[0,c,1]])
print f
print e*f
}}}

/* code_ends */

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