Coherence
Stable across redshift. Subdominant in amplitude. Reproducible across independent surveys. Background expansion preserved.
Core testsNO NEW SECTOR
No new particles.
The hypothesis introduces no additional matter species, no propagating field and no hidden dynamical sector.
UNMODIFIED GR
No modified gravity.
The Einstein field equations and standard matter conservation remain intact. Exact FLRW is recovered when the imprint amplitude tends to zero.
INITIAL GEOMETRY
A weak primordial imprint.
ICH asks whether ultra-long-wavelength curvature information can be admitted as initial spatial data and persist as a frozen large-scale bias.
OBSERVATIONAL SIGNATURE
Weak. Smooth. Statistical.
Any valid signal must remain coherent on the largest scales—never a sharp local mass clump, a dominant correction or a freely adjustable explanation.