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Let L be a nonsingular lower triangular matrix of order n. (a) What is the cost of computing L -1 ? (b) What is the
Let L be a nonsingular lower triangular matrix of order n.
(a) What is the cost of computing L-1?
(b) What is the cost of solving Lx = b by first computing L-1 and then forming the matrix-vector product x = L-1b? Compare with the cost of forward substitution.
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