The Lorentz group on the transverse lattice
During summer 2004, Geneva student Tyler Anderson studied
the behavior of the Lorentz group on the transverse lattice.
In final3.pdf (PDF), he
found that the transverse boost operator remains exact, even at
finite lattice spacing.
Also, he investigated some simple models to see how transverse motion
works for mesons and baryons.
(LaTeX source)