Calculation record
Exact checks for a nonzero same-field support background.
The calculation checks the algebraic Schur criterion, the angular
scaling of the inverse-support channel, and the two scalar sectors
(degree zero and degree one) left outside that inverse. It is an
inverse construction, not a derivation of the background from
Psi_infinity.
Research context
- A nonzero same-field background and the joint support bound
A stable retained amplitude with a nonzero background can supply the missing angular force without shifting the reference spectrum, while its exact Schur complement gives a necessary joint-stability bound.
- 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.