  We reported that the pair-pair correlation function of the two-dimensional
t-J model does not have long-range d-wave superconducting correlations in the
interesting parameter range of $J/t \leq 0.5$. The power-Lanczos method is used
under the assumption of monotonic behavior. This assumption has been well
checked in the two-dimensional t-J and attractive Hubbard model. Here we
re-examine this criterion of monotonic behavior of the pairing correlation
function for the one-dimensional and two-leg t-J ladder where other accurate
numerical results are available. The method seems to be working well.
