> **Historical provenance document — superseded.** This file preserves an earlier project state. It is not the current scientific interpretation. The canonical v0.3 position is that galaxy-specific structural fingerprints are reproducible and organized; sampling and preparation sensitivity describe how the fingerprints are expressed rather than negating their existence.

# Galaxy Structural Fingerprints — foundation synthesis

The separate research corpus is complete.

## Assets consolidated

- three frozen SPARC source files;
- 3389 prepared radial rows, including validity records;
- 175 paired chamber ladders;
- STRUC-I and STRUC-PERC-I research interfaces;
- raw STRUC-I and STRUC-PERC-I exports;
- 121 consolidated galaxy signatures;
- 4840 complete STRUC-I κ-profile rows;
- a neutral curve descriptor table;
- a low-dimensional structural-response atlas;
- a polished Excel archive.

## Present result

The full chamber curves carry galaxy-specific structural information. The next task is to
separate stable identity from sampling and coverage effects.

## Next instrument

**GAL-FINGERPRINT-I — Galaxy Structural Identity and Stability Audit**

It should test whether within-galaxy curve distances are smaller than between-galaxy
distances under uncertainty propagation, point deletion, matched thinning, and radial
truncation, and should report source-identification accuracy for perturbed realizations.
