add comment to refer to original minimize.m

1 files changed, 3 insertions, 0 deletions

diff --git a/cg.lua b/cg.lua
index 1b4b9b3..ffcf3b2 100644
--- a/cg.lua
+++ b/cg.lua
@@ -1,3 +1,6 @@
+-- This cg implementation is a rewrite of minimize.m written by Carl
+-- E. Rasmussen. It is supposed to produce exactly same results (give
+-- or take numerical accuracy due some changed order of operations).
 function cg(opfunc,x, params)
 
    -- parameters