found a counterexample

2025-10-24 16:02:48 +08:00
parent 18b69540bc
commit 1363de0328
2 changed files with 10 additions and 0 deletions
--- a/projection.sage
+++ b/projection.sage
@@ -1,5 +1,6 @@
 # cogirth-packing gap of projections of graphic matroids
 # see if gap(projection) <= 2 * gap(graph)
+# this is wrong. see the last matrix in projection.out

 from sage.all import *
 from sage.matroids.all import *