TI - Derivative expansion and the effective action for the abelian Chern-Simons theory at higher orders PY - 2001 AU - Brandt, Fernando Tadeu Caldeira AU - Das, Ashok AU - Frenkel, Josif AU - Taylor, J. C. UR - http://arXiv.org/PS_cache/hep-th/pdf/0103/0103221.pdf PP - São Paulo PB - IFUSP ER -