USR-2026-0009 · Topology

The universe is spatially flat: Ω_k = +0.0025 ± 0.0019 with CMB+BAO+SN (1.3σ from zero); geometry-only data (BAO+SN, no CMB) allow Ω_k = +0.0320 ± 0.0174.

PROVISIONAL null result — flat (Ω_k = +0.0025 ± 0.0019) re-run & confirmed 2026-07-09 (R0 — founder CI; independence pending)

The direct curvature fit comes back flat with all data combined. Without the CMB the constraint loosens by an order of magnitude and drifts mildly open — the flatness verdict is CMB-anchored.

TENSION — the registry's self-check flags this claim

Declared contradiction with USR-2026-0046 SPECULATIVE — “The observable universe is the interior of a black hole.”. One of these claims must eventually fall.

automated sweep · exact quantity-name match · flagged when |Δ| > 3σ combined · resolves only by evidence — raw feed

Falsify-box — how to kill this claim

SURVIVED Flatness is DEAD if any curvature fit whose precision is at least as good as the claim's own (sigma(Omega_k) <= 0.0019) returns a central value at or beyond 3 sigma OF THAT SAME FIT from zero: |Omega_k| / sigma_fit >= 3 (3 sigma is a stated convention, not a derived number). One rule, floating with the fit's own error: at the claim's own sigma = 0.0019 that means |Omega_k| >= 0.0057; at the sigma(Omega_k) ~ 0.001-0.002 that run_curvature.py itself quotes for Euclid and CMB-S4 it means |Omega_k| >= 0.003-0.006; a DESI DR3 + Euclid BAO combination at sigma = 0.0015 dies at |Omega_k| >= 0.0045. Note the firing path that needs no new physics: the claim's own central value +0.0025 surviving a 3x error shrink is itself 3.9 sigma, so this claim can die on precision alone. Second arm, the geometry-only channel where the claim's own summary concedes the verdict is CMB-anchored: DEAD if a CMB-free BAO+SN fit tightened to sigma(Omega_k) <= 0.006 returns |Omega_k| >= 3 sigma_fit (>= 0.018 at that precision), i.e. the quoted +0.0320 hardening into a detection. Sign is irrelevant: closed (Omega_k < 0, the black-hole-interior direction run_curvature.py plots as OK_PLANCK_ALONE = -0.044 +/- 0.017) and open both fire.

Verification record — every quoted number, re-run 2026-07-09

quantitymeasuredverdict
Ω_k (CMB+BAO+SN) +0.0025 ± 0.0019 (flat) MATCH
Ω_k (BAO+SN only) +0.0320 ± 0.0174 MATCH

Provenance

script: blackhole_seam/run_curvature.py
script status: PRESENT
datasets: Planck CMB (compressed) · DESI DR2 BAO · Pantheon+ · claim-scripts (downloadable from /data — run it yourself)
re-run: 2026-07-09

Status, honestly

R0 pass 2026-07-09 | kill test added by the 2026-07-26 sweep. Status here is computed from evidence — the author cannot set it, and neither can we. Independent reproduction would move it; nothing else will.

§ Figures 1 from blackhole_seam/run_curvature.py

What this claim's own script draws. These are the founder's committed outputs — the same plots the script regenerates on any machine that runs it.

curvature.png 108.8 KB download
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