1 files changed, 21 insertions, 0 deletions
diff --git a/src/util/integer.cpp b/src/util/integer.cpp
index 8fc788eb8..41291cc42 100644
--- a/src/util/integer.cpp
+++ b/src/util/integer.cpp
@@ -1,3 +1,24 @@
+/*********************                                                        */
+/** integer.cpp
+ ** Original author: taking
+ ** Major contributors: none
+ ** Minor contributors (to current version): none
+ ** This file is part of the CVC4 prototype.
+ ** Copyright (c) 2009, 2010  The Analysis of Computer Systems Group (ACSys)
+ ** Courant Institute of Mathematical Sciences
+ ** New York University
+ ** See the file COPYING in the top-level source directory for licensing
+ ** information.
+ **
+ ** A multiprecision rational constant.
+ ** This stores the rational as a pair of multiprecision integers,
+ ** one for the numerator and one for the denominator.
+ ** The number is always stored so that the gcd of the numerator and denominator
+ ** is 1.  (This is referred to as referred to as canonical form in GMP's
+ ** literature.) A consquence is that that the numerator and denominator may be
+ ** different than the values used to construct the Rational.
+ **/
+
 #include "util/integer.h"
 
 using namespace CVC4;