Given a permutation matrix the'the question is to decide if thethere is a permutation matrix isrepresenting a cycle matrix within Hamming distance $d$ from given matrixmatrix'. Is there an efficient algorithm for it?
Given a permutation matrix the question is there always a permutation matrix which is a cycle matrix within Hamming distance $O(1)$ from given matrix? If not what is the worst case Hamming distance?
Given a permutation matrix the question is there always a permutation matrix which is a cycle matrix within Euclidean distance $O(1)$ per row and per column from given matrix? If not what is the worst case Euclidean distance $O(1)$ per row and per column?