048-2015

MO640 - Multiple-choice question

Given the signed, extended permutation 0 3 1 6 5 −2 4 7:

1. A possible oriented pair for this permutation is (6, 5). 
2. The score of the oriented pair (1, −2) for this permutation is 4. 
3. If we apply the reversal corresponding to (1, −2) to this permutation, the new permutation would have oriented pairs (−2, 3) and (5, −6).

Which statements are correct?

1. Only I 
2. Only II
3. Only II and III
4. Only III
5. None of the above

Original idea by: Jéssica Akemi Matsuoka