diff --git a/lslopt/lslfoldconst.py b/lslopt/lslfoldconst.py
index b77405a..2a9514d 100644
--- a/lslopt/lslfoldconst.py
+++ b/lslopt/lslfoldconst.py
@@ -1150,6 +1150,10 @@ class foldconst(object):
                 return
 
             if nt in ('*', '/'):
+                # TODO: <0,0,0,1>*rot, rot*<0,0,0,1>, rot/<0,0,0,1>  ->  rot
+                #       <0,0,0,1>/<x,y,z,s>  ->  <-x,-y,-z, s>
+                #       <0,0,0>*vec  ->  0 if SEF
+                #       <0,0,0>*rot  ->  <0,0,0> if SEF
                 # Extract signs outside
                 if child[0].nt == 'NEG' or child[1].nt == 'NEG':
                     a, b = 0, 1
diff --git a/main.py b/main.py
index 2be6217..b003fa1 100755
--- a/main.py
+++ b/main.py
@@ -19,6 +19,9 @@
 #
 #    If you choose to use a later version of the GPL, please modify the text
 #    in the Usage() function appropriately to indicate the correct version.
+#
+#    Sei Lisa is the author's username in the Second Life(R) virtual world.
+#    Second Life is a registered trademark of Linden Research, Inc.
 
 # This is the main executable program that imports the libraries.