-- -*- M2-comint -*- {* hash: 1901431785 *}

i1 : R = QQ[x..z];

i2 : M = cokernel vars R

o2 = cokernel | x y z |

                            1
o2 : R-module, quotient of R

i3 : C = res M

      1      3      3      1
o3 = R  <-- R  <-- R  <-- R  <-- 0
                                  
     0      1      2      3      4

o3 : ChainComplex

i4 : R = ZZ/2[a..d];

i5 : M = coker random(R^4, R^{5:-3,6:-4});

i6 : (<< "-- computation started: " << endl;
      while true do try (
          alarm 3;
          time res M;
          alarm 0;
          << "-- computation complete" << endl;
          status M.cache.resolution;
          << res M << endl << endl;
          break;
          ) else (
          << "-- computation interrupted" << endl;
          status M.cache.resolution;
          << "-- continuing the computation" << endl;
          ))
-- computation started: 
     -- used 1.3528 seconds
-- computation complete
 4      11      89      122      40
R  <-- R   <-- R   <-- R    <-- R   <-- 0
                                         
0      1       2       3        4       5


i7 :