# ABC_BRIDGE_INTERPRETATION.txt
# STELLAR_BOUNDARY_DYNAMICS_I
# A-B-C Tri-Domain Bridge Interpretation

PURPOSE:
Interpret the tri-domain bridge across pre-boundary profiles, post-boundary
light curves, and post-boundary spectral line evolution.

DATA LAYERS:
A = pre-supernova radial support/composition profiles
B = post-collapse light-curve response trajectories
C = post-collapse spectral line-evolution trajectories

PRIMARY DOMAIN DISTANCES:
A-B centroid distance = 0.401020743943 (weak_separation)
B-C centroid distance = 1.28680820504 (strong_separation)
A-C centroid distance = 1.36461962101 (strong_separation)

GLOBAL ABC CLASSIFICATION:
A_to_B_contact_with_C_branching

INTERPRETATION:
The tri-domain structure is best read as A-to-B contact or weak transition,
with C branching away as an independent post-collapse observable regime.

DOMAIN-PAIR DETAILS:
A-B: centroid=0.401020743943 label=weak_separation; min_pair=A2_20M <-> B_SN1993J min_distance=0.150098342866; max_pair=A2_20M <-> B_SN1987A max_distance=1.39314443355; pre-boundary profiles and light curves are related but shifted
B-C: centroid=1.28680820504 label=strong_separation; min_pair=B_SN2012aw <-> C1_SN1993J min_distance=0.542539973495; max_pair=B_SN1987A <-> C2_SN2012aw max_distance=2.50097591461; light curves and spectra form distinct post-boundary observable regimes
A-C: centroid=1.36461962101 label=strong_separation; min_pair=A2_20M <-> C1_SN1993J min_distance=0.660980146584; max_pair=A1_12M <-> C2_SN2012aw max_distance=2.44930343909; pre-boundary profiles and spectra are separated across the full boundary route

OBJECT CHAIN ALIGNMENT:
SN1993J_contact_chain: A=A2_20M B=B_SN1993J C=C1_SN1993J; dAB=0.150098342866; dBC=0.65418275736; dAC=0.660980146584; branching_index=0.504084414494; compact transition chain with C still near B
SN2012aw_anomaly_chain: A=A2_20M B=B_SN2012aw C=C2_SN2012aw; dAB=0.437996731224; dBC=1.90778269098; dAC=2.0085992428; branching_index=1.46978595976; C branches away from the A-B contact path

VALID CLAIM:
The ABC bridge evaluates whether a catastrophic stellar boundary is better
described as a simple chain or as routing between linked admissible regimes.

INVALID CLAIMS:
Do not claim direct supernova prediction, hydrodynamic explosion modeling,
radiative-transfer modeling, or nucleosynthesis yield recovery.

NEXT STEP:
Create ABC_BRIDGE_RESULT_RECORD.txt and update the manuscript synthesis.