Pith Number

pith:NS5TUTSX

pith:2000:NS5TUTSXF4F3IHJB6GZGMKOQYH

not attested not anchored not stored refs pending

Can the Universe escape eternal acceleration?

Joao Magueijo, John Barrow, Rachel Bean

arxiv:astro-ph/0004321 v1 · 2000-04-23 · astro-ph · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NS5TUTSXF4F3IHJB6GZGMKOQYH}

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.

Receipt and verification

First computed	2026-07-04T16:16:20.560259Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6cbb3a4e572f0bb41d21f1b26629d0c1e538101e5ebb74ecc2d898e3e45f57a5

Aliases

arxiv: astro-ph/0004321 · arxiv_version: astro-ph/0004321v1 · doi: 10.48550/arxiv.astro-ph/0004321 · pith_short_12: NS5TUTSXF4F3 · pith_short_16: NS5TUTSXF4F3IHJB · pith_short_8: NS5TUTSX

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/NS5TUTSXF4F3IHJB6GZGMKOQYH \
  | 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: 6cbb3a4e572f0bb41d21f1b26629d0c1e538101e5ebb74ecc2d898e3e45f57a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "283c9834ab0061257ec793700a8d10892cbe18c7c5ecd66c6324fcd12e24f8e9",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-04-23T12:46:59Z",
    "title_canon_sha256": "f721c7ea327bc855656dfe8a0d4f2e2ca72d7399259646fcdc536453f82460ad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0004321",
    "kind": "arxiv",
    "version": 1
  }
}