A square matrix is called upper triangular if all of the entries below the main diagonal are
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Where the entries marked * are arbitrary. A more formal definition of such a matrix A=[aij] is that aij = 0 if i > j.
Prove that the product of two upper triangular n × n matrices is upper triangular.
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Suppose A a ij and B b ij are both upper triangular n n matrices This means that ...View the full answer
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