Categorification of Crystals

[anneschilling]

This patch let the crystal code use the category framework

New crystal categories:

• Crystals
• FiniteCrystals
• HighestWeightCrystals
• ClassicalCrystals

together with a template in categories/example/crystals on how to
implement a new crystal.

The files

• combinat/crystals/letters.py
• combinat/crystals/tensor_product.py
• combinat/crystals/spins.py
• combinat/crystals/fast_crystals.py
• combinat/crystals/highest_weight_crystals.py
• combinat/crystals/direct_sum.py
• combinat/crystals/affine.py
• combinat/crystals/kirillov_reshetikhin.py

have been categorified. What was before in

• combinat/crystals

is now mostly in the various categories except for the BackTracker class and the documentation about crystals.

This patch breaks old crystal pickles. Well, those were actually
silently broken since #7978 four months ago, and no-one voted for
against this on sage-combinat-devel.

Depends on #8881. Requires updating Sage's pickle jar.

CC: @sagetrac-sage-combinat

Component: combinatorics

Keywords: crystals

Author: Anne Schilling

Reviewer: Nicolas M. Thiery

Merged: sage-4.4.4.alpha1

Issue created by migration from https://trac.sagemath.org/ticket/8911

[anneschilling]

Changed keywords from none to crystals

[anneschilling]

Description changed:

--- 
+++ 
@@ -1 +1,31 @@
+Trac # 8911: Use category framework for crystal code
+(depends on #8881)
 
+New crystal categories:
+
+- crystals
+- finite_crystals
+- highest_weight_crystals
+- classical_crystals
+
+together with a template in
+categories/example/crystals
+on how to implement a new crystal.
+
+The files
+
+combinat/crystals/letters.py and
+combinat/crystals/tensor_product.py
+combinat/crystals/spins.py
+combinat/crystals/fast_crystals.py
+combinat/crystals/highest_weight_crystals.py
+combinat/crystals/direct_sum.py
+combinat/crystals/affine.py
+combinat/crystals/kirillov_reshetikhin.py
+
+have been categorified. What was before in
+
+combinat/crystals
+
+is now mostly in the various categories except for the BackTracker class and the documentation about crystals.
+

[anneschilling]

Author: Anne Schilling

[anneschilling]

Description changed:

--- 
+++ 
@@ -4,8 +4,11 @@
 New crystal categories:
 
 - crystals
+
 - finite_crystals
+
 - highest_weight_crystals
+
 - classical_crystals
 
 together with a template in
@@ -15,12 +18,19 @@
 The files
 
 combinat/crystals/letters.py and
+
 combinat/crystals/tensor_product.py
+
 combinat/crystals/spins.py
+
 combinat/crystals/fast_crystals.py
+
 combinat/crystals/highest_weight_crystals.py
+
 combinat/crystals/direct_sum.py
+
 combinat/crystals/affine.py
+
 combinat/crystals/kirillov_reshetikhin.py
 
 have been categorified. What was before in

[anneschilling]

Reviewer: Nicolas M. Thiery

[anneschilling]

comment:4

Nicolas set a positive review on this provided that the old crystal pickle jars can be replaced by new ones (nobody seemed to complain that they needed the old ones, see

http://groups.google.com/group/sage-combinat-devel/browse_thread/thread/7b20c1bef1598707/5a98f8b5f3443cfd?hl=en&lnk=gst&q=unpickling+of+crystals#5a98f8b5f3443cfd

[nthiery]

This is the pickle jar from sage-4.4.2 (and most likely sage-4.4.3), with the crystal pickles updated

[nthiery]

comment:5

Attachment: pickle_jar.tar.bz2.gz

[nthiery]

Description changed:

--- 
+++ 
@@ -1,41 +1,36 @@
-Trac # 8911: Use category framework for crystal code
-(depends on #8881)
+This patch let the crystal code use the category framework
 
 New crystal categories:
 
-- crystals
+* Crystals
+* FiniteCrystals
+* HighestWeightCrystals
+* ClassicalCrystals
 
-- finite_crystals
-
-- highest_weight_crystals
-
-- classical_crystals
-
-together with a template in
-categories/example/crystals
-on how to implement a new crystal.
+together with a template in categories/example/crystals on how to
+implement a new crystal.
 
 The files
 
-combinat/crystals/letters.py and
-
-combinat/crystals/tensor_product.py
-
-combinat/crystals/spins.py
-
-combinat/crystals/fast_crystals.py
-
-combinat/crystals/highest_weight_crystals.py
-
-combinat/crystals/direct_sum.py
-
-combinat/crystals/affine.py
-
-combinat/crystals/kirillov_reshetikhin.py
+* combinat/crystals/letters.py
+* combinat/crystals/tensor_product.py
+* combinat/crystals/spins.py
+* combinat/crystals/fast_crystals.py
+* combinat/crystals/highest_weight_crystals.py
+* combinat/crystals/direct_sum.py
+* combinat/crystals/affine.py
+* combinat/crystals/kirillov_reshetikhin.py
 
 have been categorified. What was before in
 
-combinat/crystals
+* combinat/crystals
 
 is now mostly in the various categories except for the BackTracker class and the documentation about crystals.
 
+This patch breaks old crystal pickles. Well, those were actually
+silently broken since #7978 four months ago, and no-one voted for
+against this on sage-combinat-devel.
+
+Depends on #8881. Requires updating Sage's pickle jar.
+
+