| #### D.15.22.4 Scontinue Procedure from library `schreyer.lib` (see schreyer_lib). Usage: Scontinue(int len) Return: nothing, instead it changes the currently active resolution Purpose: extends the currently active resolution by at most len syzygies Assume: must be used within a ring returned by Sres or Ssyz Example:
    LIB "schreyer.lib";
    ring r;
    module M = maxideal(1); M;
    ==> M[1]=x*gen(1)
    ==> M[2]=y*gen(1)
    ==> M[3]=z*gen(1)
    def S = Ssyz(M); setring S; S;
    ==> //   characteristic : 32003
    ==> //   number of vars : 3
    ==> //        block   1 : ordering IS(0)
    ==> //        block   2 : ordering dp
    ==> //                  : names    x y z
    ==> //        block   3 : ordering C
    ==> //        block   4 : ordering IS(1)
    "Only the first syzygy: ";
    ==> Only the first syzygy:
    RES; MRES;
    ==> [1]:
    ==>    _[1]=0
    ==> [2]:
    ==>    _[1]=z*gen(1)
    ==>    _[2]=y*gen(1)
    ==>    _[3]=x*gen(1)
    ==> [3]:
    ==>    _[1]=y*gen(2)-z*gen(3)
    ==>    _[2]=x*gen(2)-z*gen(4)
    ==>    _[3]=x*gen(3)-y*gen(4)
    ==> MRES[1]=0
    ==> MRES[2]=z*gen(1)
    ==> MRES[3]=y*gen(1)
    ==> MRES[4]=x*gen(1)
    ==> MRES[5]=y*gen(2)-z*gen(3)
    ==> MRES[6]=x*gen(2)-z*gen(4)
    ==> MRES[7]=x*gen(3)-y*gen(4)
    "More syzygies: ";
    ==> More syzygies:
    Scontinue(10);
    RES; MRES;
    ==> [1]:
    ==>    _[1]=0
    ==> [2]:
    ==>    _[1]=z*gen(1)
    ==>    _[2]=y*gen(1)
    ==>    _[3]=x*gen(1)
    ==> [3]:
    ==>    _[1]=y*gen(2)-z*gen(3)
    ==>    _[2]=x*gen(2)-z*gen(4)
    ==>    _[3]=x*gen(3)-y*gen(4)
    ==> [4]:
    ==>    _[1]=x*gen(5)-y*gen(6)+z*gen(7)
    ==> [5]:
    ==>    _[1]=0
    ==> MRES[1]=0
    ==> MRES[2]=z*gen(1)
    ==> MRES[3]=y*gen(1)
    ==> MRES[4]=x*gen(1)
    ==> MRES[5]=y*gen(2)-z*gen(3)
    ==> MRES[6]=x*gen(2)-z*gen(4)
    ==> MRES[7]=x*gen(3)-y*gen(4)
    ==> MRES[8]=x*gen(5)-y*gen(6)+z*gen(7)
    ==> MRES[9]=0

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