Book
Linear Algebra
Author
Gilbert Strang
Edition
A=matrix(QQ,([2,-1,0],[-1,2,-1],[-1,2,-1],[-1,2,0])) print A b= vector([0,0,0,5]) c=A.auguent(b.transpose()) print print c.echelon_form() c.pivot_rows()
[0, 1, 3:
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