Massimo Perfetti — writingNotes and essays.https://massimoperfetti.com/enNotes on rollout stability for learned PDE surrogateshttps://massimoperfetti.com/writing/notes-on-rollout-stability/https://massimoperfetti.com/writing/notes-on-rollout-stability/Why one-step training error tells you almost nothing about long-horizon behavior, and three regularizers that actually move the needle.Fri, 01 May 2026 00:00:00 GMT