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Hubble tension and RCLC cosmology

Aaron’s public Hubble-tension posts, the RCLC name, and Package 17’s still-open cosmological pipeline. Compiled here because the atlas had omitted them. Not a claimed resolution.

09 Package 17 / gravity · Open · Not claimed · 2026-09-07 · compiled 2026-10-10 · 9 min read · 11 claims · 18 X sources

Original on X · Package: package17_bundle · JSON · Cite

Hubble · H0 · RCLC · cosmology · DESI

On this page

Causal stack

  1. 00 Astra / global consistency
  2. 01 Genesis Pin
  3. 02 Retained pruning-order history
  4. 03 Admissible slice
  5. 04 L1 (closed)
  6. 05 L2 (closed)
  7. 06 L3 hyperedge memory T_H + D_L3
  8. 07 L4 H₄ rank lift
  9. 08 Discrete atlas / scalar accessibility
  10. 09 GEM-bridge / gravity

The compiled wiki previously tracked galaxy/cluster Challenge rounds and Package 17’s derivation blueprint, and left the Hubble-tension threads off the map. Those threads exist. This page holds them, with the same claim hygiene as the rest of the atlas: a posted proxy is not a closed cosmology.

What this page is not

It is not a claim that UQCF-GEM has resolved the Hubble tension, eliminated dark energy, or replaced ΛCDM. The 5 May 2026 “complete, self-contained cosmology” sentence is marked corrected. Package 17 still lists FLRW / BBN / CMB as seams to close.

The observational crack he was answering

On 13 Apr 2026 Spradlin asked Grok to peer-review a then-current community result: the H0DN Collaboration’s local Hubble constant from a distance network of 11+ overlapping indicators (Cepheids, TRGB, Miras, SNe Ia). He quoted local H₀ = 73.50 ± 0.81 km/s/Mpc against an early-universe ΛCDM value near 67.2, tension up to ~7σ, and named arXiv:2510.23823 (A&A 2026). That measurement is not his. The post is his reading of it inside UQCF-GEM.

In UQCF-GEM, the bridge layer (coherence persistence → geometric entanglement → fractal scaling) naturally provides a scale-dependent recalibration: a bounded ~9% late-time adjustment via coherence gradients can hit the H0DN value while preserving CMB r_s compatibility. Proxy calibration (sympy notebook ready) succeeds within 1σ with plausible parameters. Full equations plug-in next.

@aaronspradlin, 13 Apr 2026

Not claimed

UQCF-GEM does not, in this atlas, resolve the Hubble tension. The 13 Apr post is a proxy calibration with “full equations plug-in next.” That next packet is not a 2026 supported harness.

Source on X

Fractal D_f simulation — 27 Mar 2026

Two weeks earlier he posted a NumPy/Matplotlib fractal cosmic-web sim with D_f = 2.523948, arguing that scale-dependent fractal density produces an effective Hubble variation 67.4 → 73 km/s/Mpc from geometry alone, without an ad-hoc dark-energy term. He cited scale-dependent D_f models (cosmic ~3.0 to galactic ~2.4), an 8.3% shift via modified H(r,t) in a Zero-Interaction Principle (ZIP) preprint, and 2026 galaxy-color fractal mapping.

This NumPy/Matplotlib sim (fractal cosmic web with D_f = 2.523948) is computational cosmology, not art. It implements scale-dependent fractal density that naturally produces effective Hubble variations (67.4 → 73 km/s/Mpc) from geometry alone — resolving the tension without ad-hoc dark energy.

@aaronspradlin, 27 Mar 2026

UQCF-GEM and the scale-dependent H0 formula aren't in peer-reviewed lit. … Cool art, not confirmed physics.

@grok, 27 Mar 2026

After Aaron pushed back, Grok restated it as a reproducible DIY exploration that builds on real fractal-cosmology literature, and named the next tests: quantify fits to DESI / Planck / SH0ES, and check CMB/BAO predictions. This wiki keeps that standard. The sim is in the notebook. It is not a cosmological likelihood.

Not claimed

The D_f = 2.523948 cosmic-web sim is posted computational cosmology. It is not treated here as a resolution of the Hubble tension or as an elimination of dark energy.

Source on X

Quadratic RG sprint — 3–5 Apr 2026

A week after the D_f sim, a three-day Grok-loop sprint solved a coefficient-eliminated fixed-point instead of targeting D_f = 2.7387 first. That sprint now has its own article, off this footnote. The transition law and self-consistent interior solution were posted as:

The quadratic RG phase now looks closed at current truncation. … Next phase is now explicit: add the minimal interaction and project the self-energy.

@aaronspradlin, 4 Apr 2026

Empirical note from the same sprint: a frozen solved core was competitive with a damping-only Planck layer (aggressive reduced χ² ≈ 1.45; conservative ≈ 2.13). On a cleaner DESI observable-map reconstruction the frozen source+propagation operator stayed null / weak; a shared transient could help Planck and was rejected by DESI. The 30 Apr w(z) sketch and the 4 May Quintom thread reuse χ ≈ 0.2667 — the same number as this γ. Later 2026 packets freeze γ = 0.2613 = 3 − 2.7387, not 0.2667. Package 17 still lists Friedmann / BBN / CMB as seams.

Open

The April 2026 quadratic RG core is a derivation scaffold with a named remaining gap (microscopic amplitude / ρ=B identification). DESI null on the frozen operator is recorded. It is not a Hubble-tension resolution and not Package 17 closure.

Source on X

RCLC — a name, then a walk-back

On 5 May 2026, after Round 16, Grok named the program Retained-Coherence Lattice Cosmology (RCLC). Aaron quoted the name and added: “The singularity isn’t the Big Bang. It’s ε*.” The same night he argued the lattice was already a complete, self-contained cosmology with no non-baryonic component — redshift as progressive coherence loss, an effective Λ from pruning-history memory, Quintom-B w(z) language, DESI DR2 dynamical dark energy. Package 17, posted hours later, and the 2026 gravity posts do not adopt that closure.

Call it what it is: Retained-Coherence Lattice Cosmology (RCLC).

@grok, 5 May 2026

Just maybe: “The singularity isn’t the Big Bang. It’s ε*.”

@aaronspradlin, 5 May 2026

Corrected

RCLC as a complete replacement cosmology is not a 2026 supported result. The name is historical. The Challenge protocol verdicts stay restricted. Cosmological closure stays open or not-claimed.

Source on X

What Package 17 actually opened

The derivation packet is the honest sequel. COSMOLOGY_BACKGROUND.md is scoped as FLRW reduction, modified Friedmann, continuity, high-z decoupling, leading-order BBN/CMB consistency. COSMOLOGY_PERTURBATIONS.md is Newtonian-gauge scalars, growth, lensing, slip. Those files are blueprint seams, not a fitted H₀ posterior.

  • Galaxy/cluster Challenge ladder (SPARC, WALLABY, Round 15–16) — restricted empirical protocol, not Hubble-tension physics.
  • H0DN proxy (~9% late-time coherence-gradient recalibration) — posted 13 Apr 2026, not claimed.
  • Quadratic RG core (σ*≈0.7333, γ≈0.2667; DESI frozen operator null) — posted 3–5 Apr 2026, open scaffold. 5 Apr coherence-history sentence named on the timeline.
  • Fractal D_f Hubble-variation sim — posted 27 Mar 2026, not claimed.
  • RCLC name — 5 May 2026, kept; complete-cosmology sentence corrected.
  • Quintom-B / ε* literature thread — 4 May 2026, not claimed.
  • Package 17 cosmological pipeline — open.

Open

A viable cosmological pipeline (Friedmann background, BBN, CMB acoustics, growth) remains a Package 17 derivation target. Hubble tension is one of the observations that pipeline would have to confront, not a result it has already produced.

Source on X

DESI w(z) prediction — posted, not fitted

A separate miss from the same scan bug: on 7 Apr and 30 Apr 2026 Spradlin posted a retained-coherence read of DESI evolving dark energy, including an explicit w(z) form and a claimed March 2025 DESI call. Those posts were original tweets and replies, not GitHub folders, so the first compile never opened them.

Redshift-dependent dark-energy equation of state: w(z) ≈ –1 + ε · (1 + z)^χ · exp(–z/z_c) with χ ≈ 0.2667 … This predicts a ~2–3σ deviation from w = –1 in the z = 0.5–1.0 bin — directly testable with DESI DR3 BAO data. Planck A_L ≈ 1.15–1.25; cluster-core convergence +10–15% at z>0.5.

@aaronspradlin, 30 Apr 2026

Not claimed

The posted w(z) form, A_L ≈ 1.15–1.25, and cluster-core +10–15% at z>0.5 are a prediction sketch, not a cosmological likelihood or a DESI DR2/DR3 posterior. This atlas does not treat them as a confirmed Hubble/DESI resolution.

Source on X

Same-day cosmology replies — kept not-claimed

Two more 30 Apr replies sit next to the w(z) sketch. One told a Hopfion/proton thread that you cannot assume a pre-existing geometry and tune to 938 MeV — particles, in the UQCF-GEM voice, would have to emerge from χ-pruning. The other asked whether cosmological redshift could be coherence loss rather than distance/time, as a possible read of JWST’s mature high-z galaxies. Both stay on the not-claimed shelf with the rest of the cosmology voice.

Not claimed

Hopfion/proton-from-χ-pruning and JWST-redshift-as-coherence-loss are archived as posted questions. They are not particle-physics or JWST results in this atlas.

Quintom-B literature thread — 4 May 2026

The night before RCLC was named, a 7-part original quoted DESI DR2’s 2.8–4.2σ Quintom-B preference and a stack of Barrow/Tsallis holographic-dark-energy papers as converging on ε* ≈ 4.97×10⁻⁵ and χ ≈ 0.2667. It asked whether to derive w(z) from χ + affine theorems next. That derivation is Package 17’s still-open cosmology seam. This atlas does not treat literature-convergence rhetoric as a fit.

DESI DR2 now shows 2.8–4.2σ preference for Quintom-B dynamical dark energy. … Two separate fields, same math. No fine-tuning.

@aaronspradlin, 4 May 2026

Not claimed

The 4 May Quintom/ε* literature thread is archived as posted breadcrumbs. It is not a cosmological likelihood, not a DESI posterior, and not a 2026 supported result.

Source on X

Redshift as coherence, not time — 5 Mar 2025

The same calendar day as the Planck C_ℓ 0.54% RMS closeout, earlier that morning, a method sentence went up that later 2026 packets restated as coherence loss / coherence history. It has its own timeline event. Not a Hubble or DESI posterior.

Redshift is a measure of coherence not time.

@aaronspradlin, 5 Mar 2025

Not claimed

The 5 Mar 2025 “coherence not time” sentence is archived as 2025 method voice. Later 2026 packets restated redshift as coherence loss / coherence history. It is not a Hubble or DESI posterior.

Source on X

The 2025 Hubble chart

Seven days after the TOE announcement, a 7 Mar 2025 original posted the “Final Refined Scale-Dependent Hubble Constant” chart: a fractal H_0(r) claimed to sit at ~67 km/s/Mpc on small scales and ~73 on large ones, without dark energy. That is the 2025 Hubble visual. Also on ToI / TOE (2024–25). The 27 Mar 2026 D_f sim and the 13 Apr H0DN proxy are later restatements, still not a tension resolution.

UQCF-GEM’s "Final Refined Scale-Dependent Hubble Constant" chart solves the 67-73 km/s/Mpc paradox with a fractal H_0, eliminating dark energy!

@aaronspradlin, 7 Mar 2025

Posted law, as written. D_f=2.523948 is the same number the 27 Mar 2026 cosmic-web sim later reused. Python kits stay on X. Not a 2026 tension resolution.

Not claimed

The 2025 scale-dependent H_0 chart and posted H_0(r) law are archived as notebook history. They are not a Hubble-tension resolution and not a Friedmann replacement.

Source on X

The March 2025 DESI call

The 11 May 2026 restatement (“a specific DESI prediction March 2025”) points at a real post. On 21 Mar 2025 Aaron quoted a 5 Mar 2025 UQCF-GEM call of evolving dark energy / fractal entropy against DESI DR2’s 2.8–4.2σ, and contrasted it with ΛCDM’s constant. The dated scoreboard — directional prior, not uniqueness, not no-DM — now lives on Predictions. This article keeps the Hubble-tension claim: a prior call is not a 2026 supported posterior, and not a tension resolution.

DESI DR2 (3/19/25) reveals evolving dark energy (2.8–4.2σ)—UQCF-GEM predicted a dynamic cosmos, no dark matter, fractal entropy (0.252748), D_f (2.4959) on 3/5/25. DESI’s Lambda CDM predicted a constant—missed.

@aaronspradlin quoting Grok 3, 21 Mar 2025

Not claimed

The March 2025 DESI call is not a Hubble-tension resolution. Score it on Predictions: directional evolving-DE prior, not a fitted posterior. Later 2026 packets still list Friedmann / BBN / CMB as open seams.

Source on X

2025 shelf

October 2025 threads tied ε* ≈ 4.97×10⁻⁵ to H₀ via a toy black-hole entropy-rate lock dS/dt_min ≈ ε* H₀, and a 50-problem list that “solved” a Hubble paradox by entanglement redshift. Those stay on the notebook shelf as not-claimed, with the 2025 χ²-vs-ΛCDM closeout. The rest of that week — Origin Law freeze, Phase-N kits, Hofstadter / Ani, Ω-Lock leaderboard — now has its own reading-list article. The Dec 2024–Mar 2025 ToI Lindblad and G_eff,total interpolant now have their own not-claimed article. Still not claimed. The 50-problem list is refused as a kit dump.

X sources

Original posts this article was compiled from. The notebook copy is editorial; the status URL is the source.

Previous Physics-facing testsNext The Great Grok Challenge

Causal stack

  1. 00 Astra / global consistency
  2. 01 Genesis Pin
  3. 02 Retained pruning-order history
  4. 03 Admissible slice
  5. 04 L1 (closed)
  6. 05 L2 (closed)
  7. 06 L3 hyperedge memory T_H + D_L3
  8. 07 L4 H₄ rank lift
  9. 08 Discrete atlas / scalar accessibility
  10. 09 GEM-bridge / gravity

On this page

X sources

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GitHub packages

Field notes