# BC_BRIDGE_INTERPRETATION.txt
# STELLAR_BOUNDARY_DYNAMICS_I
# B–C Bridge Interpretation

PURPOSE:
Interpret the first bridge comparison between Phase B post-collapse
light-curve response vectors and Phase C post-collapse spectral line-evolution
vectors.

DATA LAYERS:
Phase B uses observed light-curve response ladders.
Phase C uses WISeREP spectral line-window ladders.
Both domains are compared only after normalization-reviewed v2 vector construction.

PRIMARY DOMAIN RESULT:
Centroid distance = 1.31753512889
Centroid separation label = strong_separation

CLOSEST B–C PAIR:
B_SN2012aw ↔ C1_SN1993J
distance = 0.64829362306
interpretation = cross-object weak separation

MOST SEPARATED B–C PAIR:
B_SN1987A ↔ C2_SN2012aw
distance = 2.6457282231
interpretation = cross-object strong separation

OBJECT-MATCHED ALIGNMENT:
Mean object-matched distance = 1.31770171513
Mean all-pair B-C distance = 1.59818652776
SN1993J: B_SN1993J ↔ C1_SN1993J distance=0.712109467708; matched_is_nearest=yes; matched C object is nearest spectral counterpart; contact-case pilot test
SN2012aw: B_SN2012aw ↔ C2_SN2012aw distance=1.92329396256; matched_is_nearest=no; matched C object is not nearest spectral counterpart; SN2012aw special-case persistence test

INTERPRETATION RULE:
This bridge compares two post-collapse observable channels. It does not
claim that spectral line-window proxies are direct abundances or that vector
proximity alone proves physical causation.

VALID CLAIM:
The B–C bridge tests whether brightness-response and spectral-line evolution
preserve the same contact/outlier pattern.

INVALID CLAIM:
Do not claim radiative-transfer modeling, direct nucleosynthesis yields, or
object-by-object progenitor reconstruction from this bridge alone.

NEXT STEP:
Create BC_BRIDGE_RESULT_RECORD.txt, then proceed to A–B–C tri-domain bridge.