Index: trunk/doc/pslib/psLibADD.tex
===================================================================
--- trunk/doc/pslib/psLibADD.tex	(revision 2482)
+++ trunk/doc/pslib/psLibADD.tex	(revision 2640)
@@ -1,3 +1,3 @@
-%%% $Id: psLibADD.tex,v 1.53 2004-11-25 03:03:24 price Exp $
+%%% $Id: psLibADD.tex,v 1.54 2004-12-06 21:27:40 price Exp $
 \documentclass[panstarrs]{panstarrs}
 
@@ -1236,4 +1236,8 @@
 $\phi-\phi_p$.
 
+Note that the symmetry between the two sets of above equations means
+that inverse transformations can be made simply by switching
+$\alpha_p$ and $\phi_p$ and using the forward transformation.
+
 \paragraph{Galactic to ICRS}