Blackboard Shots with Prefix "Reed"
150924-155722: A condition on a set of pairs of crossings in a permutation (3).
150811-165615: A condition on a set of pairs of crossings in a permutation (2).
150811-164300: A condition on a set of pairs of crossings in a permutation.
150805-165235: When is the product of non-repeating braids non repeating?