The weak_covers method gives incorrect answers: sage: for w in Permutations(3): ....: w, w.weak_covers() ....: ([1, 2, 3], []) ([1, 3, 2], [[1, 2, 3]]) ([2, 1, 3], [[1, 2, 3]]) ([2, 3, 1], [[3, 2, 1]]) ([3, 1, 2], [[3, 2, 1]]) ([3, 2, 1], [[3, 1, 2], [2, 3, 1]])
The fourth and fifth lines of the output are incorrect. The correct values should be ([2, 3, 1], [[2, 1, 3]]) ([3, 1, 2], [[1, 3, 2]]) Similarly: sage: for w in Permutations(3): ....: w, w.weak_covers(side='left') ....: ([1, 2, 3], []) ([1, 3, 2], [[1, 2, 3]]) ([2, 1, 3], [[1, 2, 3]]) ([2, 3, 1], [[3, 2, 1]]) ([3, 1, 2], [[3, 2, 1]]) ([3, 2, 1], [[2, 3, 1], [3, 1, 2]]) The fourth and fifth lines should be ([2, 3, 1], [[1, 3, 2]]) ([3, 1, 2], [[2, 1, 3]]) -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
