2 papers
gr-qc2025
Energy estimates for the good-bad-ugly model
Miguel Duarte
We establish a relationship between the equations that constitute the so-called good-bad-ugly model, whose nonlinearities are known to mimic those present in the Einstein field equ…
gr-qc2025
An asymptotic systems approach for the good-bad-ugly model with application to general relativity
Miguel Duarte, Justin C. Feng, Edgar Gasperín +1
We employ an adapted version of Hörmander's asymptotic systems method to show heuristically that the standard good-bad-ugly model admits formal polyhomogeneous asymptotic solutions…