@techreport{freedman2003a,
author = {Freedman, Michael},
title = {A Magnetic Model with a Possible Chern-Simons Phase},
year = {2003},
month = {January},
abstract = {The effect of perturbation is studied algebraically: the ground state space G◦, of H◦, is described as a surface algebra and our ansatz is that perturbation should respect this structure yielding a perturbed ground state G, described by a quotient algebra. By classification, this implies G, ∼= DE. The fundamental point is that nonlinear structures may be present on degenerate eigenspaces of an initial H◦ which constrain the possible effective action of a perturbation.},
url = {http://approjects.co.za/?big=en-us/research/publication/a-magnetic-model-with-a-possible-chern-simons-phase/},
pages = {71},
number = {MSR-TR-2001-84},
note = {Revised November 15, 2002},
}