Structural Classification of Terminal Approach, Finite Bounce, and Cosmological Recession
A three-dataset structural study of cosmological model trajectories processed through the UNNS
boundary-routing framework. Classical Friedmann contraction, the direct post-bounce LQC encoding,
and Planck-anchored ΛCDM expansion each return Full-percolation, while the full LQC bounce path
is analyzed through α-deformation and Bridge v1.1 — identifying three distinct route-topology classes
and establishing that singularity avoidance is not fully characterized by bounded curvature alone,
but by the replacement of terminal route topology with
admissible turning topology.
Phase-mean signed flows (normalized) · bar scale ±0.5
A — Terminal approach
Δln a
−0.500
density
+0.463
margin
−0.093
C — Boundary recession
Δln a
+0.500
density
−0.463
margin
+0.093
B pre-bounce
Δln a
−0.305
density
+0.299
margin
−0.100
B post-bounce ≈ −pre
Δln a
+0.305
density
−0.299
margin
+0.100
LQC Bounce ParametersDataset B · v2.2
Equation: H² = H₀² ρrel(1 − ρrel/ρc,rel)
ρc: 0.41 × ρPlanck
abounce: 2.468 × 10⁻³²
H at bounce: 0 (exact)
ρ/ρc at bounce: 1 (exact turning surface)
Branch time → a=1: 13.799 Gyr
Planck age ref.: 13.797 Gyr
Age diff.: < 0.01%
ρ/ρc=1 at the bounce marks the route-reversal coordinate,
not structural failure. The trajectory is tested-admissible at the turning locus
under all applied α-deformations.
Singularity avoidance is not fully characterized by bounded curvature alone.
Structurally, it is the replacement of terminal route topology
with admissible turning topology.
Prop. 9.1 — Full(A) ∧ Full(B) ∧ Full(C) ⇏ A ≡route B ≡route C
Prop. 9.2 — A,C magnitude-degenerate; B magnitude-distinct
Prop. 9.3 — Pilot-corpus verified result (3-layer)
Conj. 9.1 — Boundary routing for non-singular cosmologies
Hyp. 9.1 — Turning-locus shielding pattern
Conj. 9.2 — Phase-sign reversal as turning signature
Hyp. 17.1 — Perturbation continuation
Hyp. 17.2 — Route-localized spectral modification
Hyp. 17.3 — Background-symmetry transfer test
Open Problem 14.1: canonical boundary metric dℳ
— nonnegative on represented routes; zero only at a verified terminal boundary;
strictly positive at an admissible turning locus.