Haese-Hill, W.A.; Hallnäs, M.A.; Veselov, A.P.
(Symmetry, Integrability and Geometry: Methods and Applications, 2017)
We study Lamé operators of the form
L=−d²/dx²+m(m+1)ω²℘(ωx+z₀),
with m∈N and ω a half-period of ℘(z). For rectangular period lattices, we can choose ω and z0 such that the potential is real, periodic and regular. It ...