||'''Book'''|| Linear Algebra || ||'''Author'''|| Gilbert Strang || ||'''Edition'''|| || {{{ a=matrix([[-6,-1],[2,-3]]) i=matrix(2,2)+1 y=-7 b=a+y*i c=a.eigenvalues() d=b.eigenvalues() e=[0,0] e[0]=-c[0]+d[0]; e[1]=-c[1]+d[1]; bool(e[0]==y and e[1]==y) }}} * '''Solution by''': * , , * , , * , ,