Opened 6 years ago
Last modified 12 months ago
#11109 needs_work enhancement
Implement stable grothendieck polynomials for affine Weyl group elements in type A
Reported by:  nthiery  Owned by:  sagecombinat 

Priority:  major  Milestone:  sage7.2 
Component:  combinatorics  Keywords:  affine weyl groups 
Cc:  sagecombinat  Merged in:  
Authors:  Nicolas M. Thiéry  Reviewers:  
Report Upstream:  N/A  Work issues:  
Branch:  public/ticket/11109 (Commits)  Commit:  f463b0e945a4e35891640d78da1813f1b1298a0f 
Dependencies:  Stopgaps: 
Description (last modified by )
Patch under development on the SageCombinat queue:
http://combinat.sagemath.org/patches/file/tip/trac_11109stablegrothendieckpolynomialsnt.patch
The current implementation currently gives incorrect results, due to a missuse of the Pieri factors. It will be fixed by adding another feature there.
Change History (10)
comment:1 Changed 6 years ago by
 Description modified (diff)
 Milestone set to sage5.0
 Status changed from new to needs_work
 Summary changed from stable grothendieck polynomials for affine Weyl group elements in type A to Implement stable grothendieck polynomials for affine Weyl group elements in type A
comment:2 Changed 4 years ago by
 Milestone changed from sage5.11 to sage5.12
comment:3 Changed 3 years ago by
 Milestone changed from sage6.1 to sage6.2
comment:4 Changed 3 years ago by
 Milestone changed from sage6.2 to sage6.3
comment:5 Changed 3 years ago by
 Milestone changed from sage6.3 to sage6.4
comment:6 Changed 23 months ago by
 Branch set to public/ticket/11109
 Commit set to 171a5c6d817f7ccb67a0a8cd92b90d1335f2c379
comment:7 Changed 23 months ago by
 Milestone changed from sage6.4 to sage6.8
comment:8 Changed 23 months ago by
 Commit changed from 171a5c6d817f7ccb67a0a8cd92b90d1335f2c379 to f463b0e945a4e35891640d78da1813f1b1298a0f
Branch pushed to git repo; I updated commit sha1. New commits:
f463b0e  trac #11109 trying to fix some doctests

comment:9 Changed 23 months ago by
Oh, merci Frédéric!
I need to dive back into the code and algorithm for there remained a problem to fix. From the top of my mind, one needed to have access to some more combinatorial information on the Pieri factors.
comment:10 Changed 12 months ago by
 Milestone changed from sage6.8 to sage7.2
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I made a git branch from the sagecombinat patch
New commits:
Experimental code for calculating (affine) Grothendieck polynomials
trac #11109 a few pep details