diff --git a/lib/matrix.rb b/lib/matrix.rb
index b74e5f2..d3b743a 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -45,6 +45,7 @@ end
 # * Matrix.zero(n)
 # * Matrix.row_vector(row)
 # * Matrix.column_vector(column)
+# * Matrix.empty(row_count, column_count)
 #
 # To access Matrix elements/columns/rows/submatrices/properties:
 # * #[](i, j)
@@ -1573,6 +1574,7 @@ end
 # * #*(x) "is matrix or number"
 # * #+(v)
 # * #-(v)
+# * #/(v)
 # * #+@
 # * #-@
 #