Hi Bruce, I think this is very early code written by Mike Hansen and is not in the format that a lot of other code in combinatorics is in. Since Franco Saliola and I actually recently ran into the same problems with this code, I suggest that we make this a priority for the Sage Days at ICERM in July. Would you be able to attend those?
Also, could you make a wishlist what you would want to do with ribbon tableaux? Best wishes, Anne On Monday, May 14, 2018 at 11:30:38 AM UTC-7, Bruce Westbury wrote: > > Thanks Travis, i agree with your comments. My complaint is not just that > the functionality is not there (as you say, someone has to write it) but > that it has not been organised in a way that makes it simple for me to > implement the functionality I am interested in. > Before I can start I have to figure out how to convert from the current > implementation to a chain of partitions. Apart from having a gripe, I > wanted to check it was not there and I hadn't found it. It seems it is not > implemented. > > I am confused about why this is a Tableau class if it doesn't implement > Tableau methods. > > On Sunday, 13 May 2018 23:38:22 UTC+1, Travis Scrimshaw wrote: >> >> Hi Bruce, >> This is certainly an underdeveloped class in Sage. My understanding is >> that the implementation is primarily designed to compute (co)spin >> polynomials. However, there is documentation that probably should be added >> to the parent class. In particular, the 0's are all values that are >> uniquely determined by the values and positions of the non-0 entries and >> k-ribbon semistandardness, which is mentioned in the RibbonTableau doc >> (albeit a bit too briefly). +1 for adding more functionality, but it does >> need someone to add it. >> >> Best, >> Travis >> >> >> On Monday, May 14, 2018 at 3:55:18 AM UTC+10, Bruce Westbury wrote: >>> >>> I am finding the Ribbon Tableaux class frustrating. There seems to be no >>> functionality. >>> >>> If you create a ribbon tableau and look at it, it does not look like a >>> tableau >>> and no interesting methods work because it does not look like a tableau >>> to sage. >>> >>> As far as I am concerned, a ribbon tableau is an increasing sequence of >>> partitions such that >>> each difference is a ribbon shape. Although I can see how to get this >>> sequence by hand >>> from the sage representation of a ribbon tableau I have not found any >>> way of getting sage >>> to produce this list. Am I missing something? >>> >> -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
