Four successor tasks

successor tasks{ 1. Uncompressed dense-TT dynamics. Select and analyze the self-adjoint realization, invariant domains, and physical interpretation needed for a specified uncompressed measurement problem. The symmetric operator constructed here is already closable; asking whether it is closable would not be a remaining problem.

2. Number-cutoff instrument removal. Prove a specified $M\to \infty$ instrument limit, with its topology, input class, references, and resource restrictions. Agreement of finite-particle form matrix elements is not that theorem.

3. Beyond the sourced quadratic form. Construct an unregulated operator-valued sourced metric, or the cubic scalar correction $S_{t_0}(j)\varphi$, with the required ordering and domain theory. Model 3 supplies a particular quadratic response form and regulated curvature measurements, not these stronger objects.

4. Compact probe coupling. Replace the admitted global Ramsey control by a specified compact system–probe field interaction and prove equality or a controlled approximation of its selective instrument. Compact smearing alone does not provide such a coupling.}