PROVENANCE RECORD
Cosmological Boundary Routing
Dataset A — Classical Friedmann Baseline

DATASET ROLE

A_classical_friedmann is the matched classical contraction trajectory used to
represent approach toward the small-a singular boundary.

PARAMETER ANCHOR

Dataset A uses the compact Planck 2018 parameter record created for Dataset C:

C_planck_lcdm/parameters/extracted/
planck_2018_base_plikHM_TTTEEE_lowl_lowE_parameters.csv

Canonical parameter values are read from the best_fit column.

MATCHING POLICY

Dataset A and Dataset C use the same:

- H0
- Omega_m
- effective Omega_r
- Omega_Lambda_planck
- Omega_Lambda_dynamic
- flatness convention
- a_min
- a_max
- sample count
- logarithmic scale-factor grid

BRANCH DEFINITION

Dataset A uses:

H(a) = -H0 E(a)

to identify the contracting classical branch.

The magnitude E(a) is the same classical flat radiation-matter-Lambda
Friedmann function used for Dataset C.

NUMERICAL CUTOFF

The trajectory stops at:

a_min = 1e-8

This is a numerical singular-approach cutoff, not a physical singular-state
sample.

DERIVED STATUS

Dataset A is model-generated.

It is not a direct Planck observation.

Its purpose is controlled structural comparison with:

B_lqc_bounce
C_planck_lcdm

CURRENT STATUS

Folder initialized.
Generator prepared.
Trajectory not yet generated.
Validation not yet completed.
Canonical ladder not yet constructed.
Alpha application not yet run.
