LIB "tst.lib"; // sres chokes here option(prot); ring r1 = 31991,(t,x,y,z,w),(c, dp); ideal i=t2x2+tx2y+x2yz,t2y2+ty2z+y2zw,t2z2+tz2w+xz2w,t2w2+txw2+xyw2; ideal j = std(i); resolution rs = sres(j, 0); rs; betti(rs); list(rs); kill r1; ring r1 = 31991,(t,x,y,z,w),(c, ls); ideal i=t2x2+tx2y+x2yz,t2y2+ty2z+y2zw,t2z2+tz2w+xz2w,t2w2+txw2+xyw2; ideal j = std(i); resolution rs = sres(j, 0); rs; betti(rs); list(rs); tst_status(1); $