2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/5676The accurate simulation of collapsed objects requires that a huge range of spatial scales be well resolved if the result is not to be contaminated by numerically induced fragmentation. In this context, `insufficient resolution' means comparable to the local instability wavelength in the system. I define a minimum resolution criterion for simulations of disk systems, using the critical wavelength appropriate for disks.4pages. Final version of submission for the "Scientific Frontiers in Research on Extrasolar Planets" conference: June 2002 in WashingtonAstrophysicstext