Calculation record
Match regular and spatially decaying full radial perturbation subspaces.
This uses the differential equation directly. It avoids a reflecting outer
box and the high-frequency doubling of centered finite differences. A
zero of the matching determinant still needs residual and endpoint checks.
Research context
- Response of localized simplex-frequency fields
Solved localized branches have identical finite lower-grade probe energies and forces at common profile, while complete current Hessians and bounded spatial spectra distinguish that coupling identity from stability.
Interpret numerical checks within the assumptions and limitations documented in these notes.