On Fri, Mar 1, 2019 at 4:25 PM Jeremy Martin <[email protected]> wrote:
> 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]]) > > Aren't these the same as the fourth and fifth lines of the output ? Maybe I'm misinterpreting the permutation notation. 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/sage-support. > For more options, visit https://groups.google.com/d/optout. > -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
