We apply a recently developed numerical renormalization group, the corner-transfer-matrix renormalization group (CTMRG), to 2D classical lattice models at their critical temperatures. It is shown that the combination of CTMRG and the finite-size scaling analysis gives two independent critical exponents.
@article{arxiv.cond-mat/9601078,
title = {Numerical Renormalization Group at Criticality},
author = {T. Nishino and K. Okunishi and M. Kikuchi},
journal= {arXiv preprint arXiv:cond-mat/9601078},
year = {2009}
}