-- -*- M2-comint -*- {* hash: -1073031147 *} i1 : subsets(7,3) o1 = {{0, 1, 2}, {0, 1, 3}, {0, 2, 3}, {1, 2, 3}, {0, 1, 4}, {0, 2, 4}, {1, ------------------------------------------------------------------------ 2, 4}, {0, 3, 4}, {1, 3, 4}, {2, 3, 4}, {0, 1, 5}, {0, 2, 5}, {1, 2, 5}, ------------------------------------------------------------------------ {0, 3, 5}, {1, 3, 5}, {2, 3, 5}, {0, 4, 5}, {1, 4, 5}, {2, 4, 5}, {3, 4, ------------------------------------------------------------------------ 5}, {0, 1, 6}, {0, 2, 6}, {1, 2, 6}, {0, 3, 6}, {1, 3, 6}, {2, 3, 6}, ------------------------------------------------------------------------ {0, 4, 6}, {1, 4, 6}, {2, 4, 6}, {3, 4, 6}, {0, 5, 6}, {1, 5, 6}, {2, 5, ------------------------------------------------------------------------ 6}, {3, 5, 6}, {4, 5, 6}} o1 : List i2 : x = reverse \ subsets(6,3) o2 = {{2, 1, 0}, {3, 1, 0}, {3, 2, 0}, {3, 2, 1}, {4, 1, 0}, {4, 2, 0}, {4, ------------------------------------------------------------------------ 2, 1}, {4, 3, 0}, {4, 3, 1}, {4, 3, 2}, {5, 1, 0}, {5, 2, 0}, {5, 2, 1}, ------------------------------------------------------------------------ {5, 3, 0}, {5, 3, 1}, {5, 3, 2}, {5, 4, 0}, {5, 4, 1}, {5, 4, 2}, {5, 4, ------------------------------------------------------------------------ 3}} o2 : List i3 : sort x === x o3 = true i4 :