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

/* code_begins */

{{{
B=matrix([[8,-3,7],[-20,-17,-15],[11,2,9]])
print B
print B.rank()

}}}

/* code_ends */

 * '''Solution by''': 
   * k.rajesh kumar , student,snist