2 problems

Matching

The cycle-membership conjecture for skew-symmetric plane permutations
At least 10 years old
Cycle-membership conjecture. The elements $n$ and $s_n$ belong to the same cycle of $\pi$ .
openplane-permutations reversal-distance signed-permutations
07
The cycle-membership conjecture for exact skew-symmetric plane permutations
About 11 years old
Cycle-membership conjecture. The elements $n$ and $s_n$ belong to the same cycle of $\pi$ .
openplane-permutations reversal-distance signed-permutations
06