This wasn't a Quora problem, though I needed to solve this as part of the solution to a different problem.
Given the random integer matrix: ]a =: 6 12$ ?72$10 2 3 6 6 5 8 3 7 4 9 0 8 1 9 4 1 7 3 1 8 2 5 2 7 4 7 4 7 6 4 1 1 4 6 6 8 5 8 0 0 3 1 8 3 0 7 3 3 4 4 7 3 2 4 7 5 7 3 3 9 3 8 4 1 3 7 8 7 5 6 9 9 What J expression will find the largest integer that is common to all of the rows? In this specific case, the answer is 7. What about the smallest integer that's common in all rows? Skip ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
