  The accuracy of finite difference methods is related to the mesh choice and
cell size. Concerning the micromagnetism of nano-objects, we show here that
discretization issues can drastically affect the symmetry of the problem and
therefore the resulting computed properties of lattices of interacting curved
nanomagnets. In this paper, we detail these effects for the multiaxe kagome
lattice. Using the Oommf finite difference method, we propose an alternative
way of discretizing the nanomagnet shape via a variable moment per cell scheme.
This method is shown to be efficient in reducing discretization effects.
