Calculation record

Full finite-mode checks for smooth quartic coherent contact dynamics.

Exact action identities and conditional finite-mode stability, not a derived
master-field interaction or an empirical mass/coupling fit.

Research context

  • Coherent quartic variation

    A smooth quartic action has exactly coherent extrema, an explicit complete mode Hessian and finite-mode orbital stability, with the smooth-contact frequency multiplier.

  • Diagnostic catalog

    Reproduction commands and scope descriptions for every local finite diagnostic and helper.

Interpret numerical checks within the assumptions and limitations documented in these notes.