Pith Number

pith:ZDRFNXBZ

pith:2021:ZDRFNXBZ3ME6A3F4PG5H5TZC33

not attested not anchored not stored refs pending

Measurements of the Hubble Constant: Tensions in Perspective

Wendy L. Freedman

arxiv:2106.15656 v1 · 2021-06-29 · astro-ph.CO · hep-ph · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZDRFNXBZ3ME6A3F4PG5H5TZC33}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

17 papers in Pith

A solid unification of the dark sector

Redshift-Dependent Intrinsic Dispersion in the Quasar UV/X-ray Luminosity Relation

The Hubble tension: A decade review

Deep Learning Calibration of the Quasar X-ray/UV Luminosity Relation for Cosmological Applications

Dissipative Cosmology and the Nature of Dark Energy: Insights from Bulk Viscosity with DESI DR2 observations

Receipt and verification

First computed	2026-07-05T03:17:53.622829Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8e256dc39db09e06cbc79ba7ecf22defd76ce516c19d757e639c3b884c27bd6

Aliases

arxiv: 2106.15656 · arxiv_version: 2106.15656v1 · doi: 10.48550/arxiv.2106.15656 · pith_short_12: ZDRFNXBZ3ME6 · pith_short_16: ZDRFNXBZ3ME6A3F4 · pith_short_8: ZDRFNXBZ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/ZDRFNXBZ3ME6A3F4PG5H5TZC33 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: c8e256dc39db09e06cbc79ba7ecf22defd76ce516c19d757e639c3b884c27bd6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2dade418f6f0fcd7ff30592bdeb347bac7655992841ea81e5bdcd12c3f497008",
    "cross_cats_sorted": [
      "hep-ph",
      "hep-th"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2021-06-29T18:09:57Z",
    "title_canon_sha256": "3e6c7e9ba0d1b07cab24cf1279db902d1a9cde92de132cc8b333eedd460cb43d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.15656",
    "kind": "arxiv",
    "version": 1
  }
}