Item 0.4.2.c.
This is a bijection. Note that we can write this function in two line notation as \(f = \twoline{1 \amp 2 \amp 3 \amp 4 \amp 5}{5 \amp 4 \amp 3 \amp 2 \amp 1}\text{.}\)
This is a bijection. Note that we can write this function in two line notation as \(f = \twoline{1 \amp 2 \amp 3 \amp 4 \amp 5}{5 \amp 4 \amp 3 \amp 2 \amp 1}\text{.}\)