External analytical frameworks

The cited external articles provide wavefront calculus, extension methods, causal perturbation theory, BV anomaly analysis, relational-correlator examples, and RG frameworks BDHintro,BDHops,BF,Dang,FR,FRBV,FrobWard,BDF,BFR, FrobCorrelation,ReuterFlow,ReuterSaueressig. Their hypotheses must be checked at each use. None verifies a companion sheet or supplies the missing characteristic product by analogy.

In particular, an extension theorem starts with an actual distribution on its stated reference domain. It cannot manufacture an undefined joint characteristic operation.