#6096: [with patch, needs review] Fix subtle bug in partition refinement
--------------------------+-------------------------------------------------
Reporter: rlm | Owner: rlm
Type: defect | Status: new
Priority: major | Milestone: sage-4.0
Component: graph theory | Keywords:
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This patch includes a module which gives an extremely simple example of
using the `partn_ref` module, which exposed the bug, whose fix is:
{{{
diff -r feb2d962bf2b -r f5d696c216ff
sage/groups/perm_gps/partn_ref/double_coset.pyx
--- a/sage/groups/perm_gps/partn_ref/double_coset.pyx Mon May 18
12:46:23 2009 -0700
+++ b/sage/groups/perm_gps/partn_ref/double_coset.pyx Wed May 20
14:59:09 2009 -0700
@@ -540,7 +540,7 @@
if not possible:
possible = 1
i = current_ps.depth
- current_ps.depth = min(first_kids_are_same-1,
current_kids_are_same-1)
+ current_ps.depth = current_kids_are_same-1
if i == current_kids_are_same:
continue # main loop
if index_in_fp_and_mcr < len_of_fp_and_mcr - 1:
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6096>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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