fixed bug reported by Kevin Rauch: wrong sign for jn(n even, large negative x)

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@4927 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 3 insertions, 1 deletions

diff --git a/jn.c b/jn.c
index 104dcfc86..d75b86346 100644
--- a/jn.c
+++ b/jn.c
@@ -24,7 +24,9 @@ MA 02110-1301, USA. */
 #define MPFR_NEED_LONGLONG_H
 #include "mpfr-impl.h"
 
-/* Relations: j(-n,z) = (-1)^n j(n,z) */
+/* Relations: j(-n,z) = (-1)^n j(n,z)
+              j(n,-z) = (-1)^n j(n,z)
+*/
 
 static int mpfr_jn_asympt (mpfr_ptr, long, mpfr_srcptr, mp_rnd_t);