Exercise 2.7.15

Answers

(a)

P

sends row 1 to row 4 , then

P^{T}

sends row 4 to row 1

(b)

We have

P = [\begin{matrix} E & 0 \\ 0 & E \end{matrix}] = P^{T}

with

E = [\begin{matrix} 0 & 1 \\ 1 & 0 \end{matrix}]

moves all rows: 1 and 2 are exchanged, 3 and 4 are exchanged.

mathchakra

2022-01-16 12:23