1 files changed, 2 insertions, 0 deletions
diff --git a/doc/TODO b/doc/TODO
index 5ff4edc..4a59ee4 100644
--- a/doc/TODO
+++ b/doc/TODO
@@ -19,6 +19,8 @@ small things
     less-verbose messages
   output all surfaces with the same "parity", eg rho x sigma should point out
     or suchlike
+  Sascha Husa & Sergio Dain would like the ability to search for
+    "antitrapped surfaces", i.e. to flip the sign of $K_{ij}$
 
 medium things
   switch to UMFPACK 4.1 and ATLAS BLAS, cf