Changeset 3542f7 in git for Singular/iparith.cc

Timestamp:

Mar 21, 2011, 9:51:47 AM (13 years ago)

Author:

Frank Seelisch <seelisch@…>

Branches:

(u'spielwiese', 'fe61d9c35bf7c61f2b6cbf1b56e25e2f08d536cc')

Children:

ebbcea1c4e4fd18c3b6182ee4de38a23eeda4369

Parents:

6fe9a5bbf090a5f523e34382e1d8657f5cd1a5f9

Message:

allow command 'degree' over Z

git-svn-id: file:///usr/local/Singular/svn/trunk@14019 2c84dea3-7e68-4137-9b89-c4e89433aadc

File:

• Singular/iparith.cc (modified) (1 diff)

Singular/iparith.cc

@@ -3616 +3616 @@
 static BOOLEAN jjDEGREE(leftv res, leftv v)
 {
+#ifdef HAVE_RINGS
+  if (rField_is_Ring_Z(currRing))
+  {
+    ring origR = currRing;
+    ring tempR = rCopy(origR);
+    tempR->ringtype = 0; tempR->ch = 0;
+    rComplete(tempR);
+    ideal vid = (ideal)v->Data();
+    rChangeCurrRing(tempR);
+    ideal vv = idrCopyR(vid, origR, currRing);
+    sleftv vvAsLeftv; memset(&vvAsLeftv, 0, sizeof(vvAsLeftv));
+    vvAsLeftv.rtyp = IDEAL_CMD;
+    vvAsLeftv.data = vv; vvAsLeftv.next = NULL;
+    if (hasFlag(v, FLAG_STD)) setFlag(&vvAsLeftv,FLAG_STD);
+    assumeStdFlag(&vvAsLeftv);
+    Print("// NOTE: computation of degree is being performed for\n");
+    Print("//       generic fibre, that is, over Q\n");
+    intvec *module_w=(intvec*)atGet(&vvAsLeftv,"isHomog",INTVEC_CMD);
+    scDegree(vv,module_w,currQuotient);
+    idDelete(&vv);
+    rChangeCurrRing(origR);
+    rDelete(tempR);
+    return FALSE;
+  }
+#endif
   assumeStdFlag(v);
   intvec *module_w=(intvec*)atGet(v,"isHomog",INTVEC_CMD);