Sun Jan 3 23:45:49 MET 1999
REDUCE 3.7, 15-Jan-99 ...
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2: 2: 2: 2: 2: 2: 2: 2: 2:
3: 3: comment factorizer test file;
array a(20);
factorize(x**2-1);
{{x + 1,1},{x - 1,1}}
% To make sure factorizer is loaded.
algebraic procedure test(prob,nfac);
begin integer m; scalar p,q,r;
scalar basetime;
p := for i:=1:nfac product a(i);
Write "Problem number ",prob;
symbolic (basetime := time());
r := factorize p;
symbolic (basetime := time() - basetime);
q := for each j in r product first j^second j;
m := for each j in r sum second j;
if m=nfac and p=q then return ok;
write "This example failed:";
write r
end;
test
% Wang test case 1;
a(1) := x*y+z+10$
a(2) := x*z+y+30$
a(3) := x+y*z+20$
test(1,3);
Problem number 1
ok
% Wang test case 2;
a(1) := x**3*z+x**3*y+z-11$
a(2) := x**2*z**2+x**2*y**2+y+90$
test(2,2);
Problem number 2
ok
% Wang test case 3;
a(1) := x**3*y**2+x*z**4+x+z$
a(2) := x**3+x*y*z+y**2+y*z**3$
test(3,2);
Problem number 3
ok
% Wang test case 4;
a(1) := x**2*z+y**4*z**2+5$
a(2) := x*y**3+z**2$
a(3) := -x**3*y+z**2+3$
a(4) := x**3*y**4+z**2$
test(4,4);
Problem number 4
ok
% Wang test case 5;
a(1) := 3*u**2*x**3*y**4*z+x*z**2+y**2*z**2+19*y**2$
a(2) := u**2*y**4*z**2+x**2*z+5$
a(3) := u**2+x**3*y**4+z**2$
test(5,3);
Problem number 5
ok
% Wang test case 6;
a(1) := w**4*x**5*y**6-w**4*z**3+w**2*x**3*y+x*y**2*z**2$
a(2) := w**4*z**6-w**3*x**3*y-w**2*x**2*y**2*z**2+x**5*z
-x**4*y**2+y**2*z**3$
a(3) := -x**5*z**3+x**2*y**3+y*z$
test(6,3);
Problem number 6
ok
% Wang test case 7;
a(1) := x+y+z-2$
a(2) := x+y+z-2$
a(3) := x+y+z-3$
a(4) := x+y+z-3$
a(5) := x+y+z-3$
test(7,5);
Problem number 7
ok
% Wang test case 8;
a(1) := -z**31-w**12*z**20+y**18-y**14+x**2*y**2+x**21+w**2$
a(2) := -15*y**2*z**16+29*w**4*x**12*z**3+21*x**3*z**2+3*w**15*y**20$
% Commented out, since it can take a long time.
% TEST(8,2);
% Wang test case 9;
a(1) := 18*u**2*w**3*x*z**2+10*u**2*w*x*y**3+15*u*z**2+6*w**2*y**3*z**2$
a(2) := x$
a(3) := 25*u**2*w**3*y*z**4+32*u**2*w**4*y**4*z**3-
48*u**2*x**2*y**3*z**3-2*u**2*w*x**2*y**2+44*u*w*x*y**4*z**4-
8*u*w*x**3*z**4+4*w**2*x+11*w**2*x**3*y+12*y**3*z**2$
a(4) := z$
a(5) := z$
a(6) := u$
a(7) := u$
a(8) := u$
a(9) := u$
test(9,9);
Problem number 9
ok
% Wang test case 10;
a(1) := 31*u**2*x*z+35*w**2*y**2+40*w*x**2+6*x*y$
a(2) := 42*u**2*w**2*y**2+47*u**2*w**2*z+22*u**2*w**2+9*u**2*w*x**2+21
*u**2*w*x*y*z+37*u**2*y**2*z+u**2*w**2*x*y**2*z**2+8*u**2*w**2
*z**2+24*u**2*w*x*y**2*z**2+24*u**2*x**2*y*z**2+12*u**2*x*y**2
*z**2+13*u*w**2*x**2*y**2+27*u*w**2*x**2*y+39*u*w*x*z+43*u*
x**2*y+44*u*w**2* z**2+37*w**2*x*y+29*w**2*y**2+31*w**2*y*z**2
+12*w*x**2*y*z+43*w*x*y*z**2+22*x*y**2+23*x*y*z+24*x*y+41*y**2
*z$
test(10,2);
Problem number 10
ok
% Wang test case 11;
a(1) := -36*u**2*w**3*x*y*z**3-31*u**2*w**3*y**2+20*u**2*w**2*x**2*y**2
*z**2-36*u**2*w*x*y**3*z+46*u**2*w*x+9*u**2*y**2-36*u*w**2*y**3
+9*u*w*y**3-5*u*w*x**2*y**3+48*u*w*x**3*y**2*z+23*u*w*x**3*y**2
-43*u*x**3*y**3*z**3-46*u*x**3*y**2+29*w**3*x*y**3*z**2-
14*w**3*x**3*y**3*z**2-45*x**3-8*x*y**2$
a(2) := 13*u**3*w**2*x*y*z**3-4*u*x*y**2-w**3*z**3-47*x*y$
a(3) := x$
a(4) := y$
test(11,4);
Problem number 11
ok
% Wang test case 12;
a(1) := x+y+z-3$
a(2) := x+y+z-3$
a(3) := x+y+z-3$
test(12,3);
Problem number 12
ok
% Wang test case 13;
a(1) := 2*w*z+45*x**3-9*y**3-y**2+3*z**3$
a(2) := w**2*z**3-w**2+47*x*y$
test(13,2);
Problem number 13
ok
% Wang test case 14;
a(1) := 18*x**4*y**5+41*x**4*y**2-37*x**4+26*x**3*y**4+38*x**2*y**4-29*
x**2*y**3-22*y**5$
a(2) := 33*x**5*y**6-22*x**4+35*x**3*y+11*y**2$
test(14,2);
Problem number 14
ok
% Wang test case 15;
a(1) := 12*w**2*x*y*z**3-w**2*z**3+w**2-29*x-3*x*y**2$
a(2) := 14*w**2*y**2+2*w*z+18*x**3*y-8*x*y**2-y**2+3*z**3$
a(3) := z$
a(4) := z$
a(5) := y$
a(6) := y$
a(7) := y$
a(8) := x$
a(9) := x$
a(10) := x$
a(11) := x$
a(12) := x$
a(13) := x$
test(15,13);
Problem number 15
ok
% Test 16 - the 40th degree polynomial that comes from
% SIGSAM problem number 7;
a(1) := 8192*y**10+20480*y**9+58368*y**8-161792*y**7+198656*y**6+
199680*y**5-414848*y**4-4160*y**3+171816*y**2-48556*y+469$
a(2) := 8192*y**10+12288*y**9+66560*y**8-22528*y**7-138240*y**6+
572928*y**5-90496*y**4-356032*y**3+113032*y**2+23420*y-8179$
a(3) := 4096*y**10+8192*y**9+1600*y**8-20608*y**7+20032*y**6+87360*y**5-
105904*y**4+18544*y**3+11888*y**2-3416*y+1$
a(4) := 4096*y**10+8192*y**9-3008*y**8-30848*y**7+21056*y**6+146496*
y**5-221360*y**4+1232*y**3+144464*y**2-78488*y+11993$
test(16,4);
Problem number 16
ok
% Test 17 - taken from Erich Kaltofen's thesis. This polynomial
% splits mod all possible primes p;
a(1) := x**25-25*x**20-3500*x**15-57500*x**10+21875*x**5-3125$
test(17,1);
Problem number 17
ok
% Test 18 - another 'hard-to-factorize' univariate;
a(1) := x**18+9*x**17+45*x**16+126*x**15+189*x**14+27*x**13-
540*x**12-1215*x**11+1377*x**10+15444*x**9+46899*x**8+
90153*x**7+133893*x**6+125388*x**5+29160*x**4-
32076*x**3+26244*x**2-8748*x+2916$
test(18,1);
Problem number 18
ok
% Test 19 - another example chosen to lead to false splits mod p;
a(1) := x**16+4*x**12-16*x**11+80*x**9+2*x**8+160*x**7+
128*x**6-160*x**5+28*x**4-48*x**3+128*x**2-16*x+1$
a(2) := x**16+4*x**12+16*x**11-80*x**9+2*x**8-160*x**7+
128*x**6+160*x**5+28*x**4+48*x**3+128*x**2+16*x+1$
test(19,2);
Problem number 19
ok
% End of all tests;
end;
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Time for test: 2470 ms, plus GC time: 80 ms
5: 5:
Quitting
Sun Jan 3 23:45:55 MET 1999