SUBROUTINE simp1(a,mp,np,mm,ll,nll,iabf,kp,bmax)
      INTEGER iabf,kp,mm,mp,nll,np,ll(np)
      REAL bmax,a(mp,np)
      INTEGER k
      REAL test
      kp=ll(1)
      bmax=a(mm+1,kp+1)
      do 11 k=2,nll
        if(iabf.eq.0)then
          test=a(mm+1,ll(k)+1)-bmax
        else
          test=abs(a(mm+1,ll(k)+1))-abs(bmax)
        endif
        if(test.gt.0.)then
          bmax=a(mm+1,ll(k)+1)
          kp=ll(k)
        endif
11    continue
      return
      END
C  (C) Copr. 1986-92 Numerical Recipes Software .