===================================================================
RCS file: /home/cvs/OpenXM_contrib2/asir2000/lib/sp,v
retrieving revision 1.9
retrieving revision 1.14
diff -u -p -r1.9 -r1.14
--- OpenXM_contrib2/asir2000/lib/sp	2001/10/12 06:07:05	1.9
+++ OpenXM_contrib2/asir2000/lib/sp	2005/08/18 23:35:20	1.14
@@ -45,7 +45,7 @@
  * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
  * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
  *
- * $OpenXM: OpenXM_contrib2/asir2000/lib/sp,v 1.8 2000/08/22 05:04:23 noro Exp $ 
+ * $OpenXM: OpenXM_contrib2/asir2000/lib/sp,v 1.13 2004/04/13 07:43:20 noro Exp $ 
 */
 /* 
 	sp : functions related to algebraic number fields
@@ -63,6 +63,20 @@ extern ASCENT,GCDTIME,UFTIME,RESTIME,SQTIME,PRINT$
 extern Ord$
 extern USE_PARI_FACTOR$
 
+/* gen_sp can handle non-monic poly */
+
+def gen_sp(P)
+{
+	P = ptozp(P);
+	V = var(P);
+	D = deg(P,V);
+	LC = coef(P,D,V);
+	F = LC^(D-1)*subst(P,V,V/LC);
+	/* F must be monic */
+	L = sp(F);
+	return cons(map(subst,car(L),V,LC*V),cdr(L));
+}
+
 def sp(P)
 {
 	RESTIME=UFTIME=GCDTIME=SQTIME=0;
@@ -789,8 +803,13 @@ def norm_ch_lag(V,VM,P,P0) {
 
 def cr_gcda(P1,P2)
 {
-	if ( !(V = var(P1)) || !var(P2) )
+	if ( !P1 )
+		return P2;
+	if ( !P2 )
+		return P1;
+	if ( !var(P1) || !var(P2) )
 		return 1;
+	V = var(P1);
 	EXT = union_sort(getalgtreep(P1),getalgtreep(P2));
 	if ( EXT == [] )
 		return gcd(P1,P2);
@@ -1327,8 +1346,12 @@ def resfctr(F,L,V,N)
 	N = ptozp(N);
 	V0 = var(N);
 	DN = diff(N,V0);
+	LC = coef(N,deg(N,V0),V0);
+	LCD = coef(DN,deg(DN,V0),V0);
 	for ( I = 0, J = 2, Len = deg(N,V0)+1; I < 5; J++ ) {
 		M = prime(J);
+		if ( !(LC%M) || !(LCD%M))
+			continue;
 		G = gcd(N,DN,M);
 		if ( !deg(G,V0) ) {            
 			I++;
@@ -1352,7 +1375,7 @@ def resfctr_mod(F,L,M)
 		C = res(var(MP),B,MP) % M;
 		R = cons(flatten(cdr(modfctr(C,M))),R);
 	}
-	return R;
+	return reverse(R);
 }
 
 def flatten(L)