Opened 13 years ago

Closed 13 years ago

Last modified 12 years ago

#2854 closed defect (duplicate)

A correction to the weight of crystal elements for type A and a speedup for all types

Reported by: bump Owned by: mhansen
Priority: minor Milestone: sage-duplicate/invalid/wontfix
Component: combinatorics Keywords:
Cc: sage-combinat Merged in:
Authors: Reviewers:
Report Upstream: Work issues:
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Dependencies: Stopgaps:

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Description

For Cartan Types 'A' a problem with the weight function of crystals was described here:

http://groups.google.com/group/sage-combinat-devel/browse_thread/thread/7cdfe075257ba963?hl=en

The method of correcting this problem was to hard-code the weight in the crystals of letters, and to have the crystals of tensors get the weight of a tensor element by summing the weights of its constituents. This alters the weight for Type A (correcting the defect) and returns the same weight as the old algorithm for other Cartan types.

When the patch was implemented it was found to be 2-3 times faster than the old algorithm.

Attachments (1)

crystal_weights.patch (6.1 KB) - added by bump 13 years ago.

Download all attachments as: .zip

Change History (4)

Changed 13 years ago by bump

comment:1 Changed 13 years ago by mhansen

  • Resolution set to duplicate
  • Status changed from new to closed

comment:2 Changed 13 years ago by mabshoff

  • Milestone changed from sage-3.0 to sage-duplicate/invalid

comment:3 Changed 12 years ago by nthiery

  • Cc sage-combinat added
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