Question
Explain how to write down the inverse permutation using the notation of Exercise 1.4.17. Apply your method to the examples in Exercise 1.5.9, and check the result by verifying that it produces the inverse permutation matrix.
Step 1
4.17. In this notation, a permutation \(\sigma\) of a set \(\{1, 2, \ldots, n\}\) is written as a list \(\sigma = [\sigma(1), \sigma(2), \ldots, \sigma(n)]\), where \(\sigma(i)\) is the image of \(i\) under the permutation \(\sigma\). Show more…
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