Operations Research : Applications and Algorithms
Operations Research : Applications and Algorithms
4th Edition
ISBN: 9780534380588
Author: Wayne L. Winston
Publisher: Brooks Cole
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Chapter 2.1, Problem 6P

Explanation of Solution

Proving that computing the matrix product AB requires n3multiplications and n3-n2 additions:

When we multiply two n×n matrices A and B, the resultant matrix will also be of the order of n×n.

Therefore, ij element of AB= Scalar product of row i of A and column j of B.

This will constitute n×n=n2 operations. Totally, n such operations have to be done.

Therefore, total number of multiplication operations in multiplying two n×n matrices involve are given below:

n2×n=n3

After this we must do n2 addition operations in first row, then (n1)2 addition operations in second row and so on.

Therefore, the total number of addition operations is given below:

n2+(n1)2+

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