Pith Number

pith:EZT5S2AX

pith:2013:EZT5S2AXMAE6OM4HJJMHUTTCAR

not attested not anchored not stored refs pending

Editorial note to "A Homogeneous Universe of Constant Mass and Increasing Radius accounting for the Radial Velocity of Extra--Galactic Nebulae" by Georges Lema\^itre (1927)

Jean-Pierre Luminet

arxiv:1305.6470 v1 · 2013-05-28 · physics.hist-ph · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EZT5S2AXMAE6OM4HJJMHUTTCAR}

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	2026-05-18T01:49:40.809723Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2667d968176009e733874a587a4e62044419d4dd07174854ff0197a8b877cf56

Aliases

arxiv: 1305.6470 · arxiv_version: 1305.6470v1 · doi: 10.48550/arxiv.1305.6470 · pith_short_12: EZT5S2AXMAE6 · pith_short_16: EZT5S2AXMAE6OM4H · pith_short_8: EZT5S2AX

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/EZT5S2AXMAE6OM4HJJMHUTTCAR \
  | 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: 2667d968176009e733874a587a4e62044419d4dd07174854ff0197a8b877cf56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9915188eabb9704be50db5aaae79f48c1caa094f938b8766d197cde254d736a1",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2013-05-28T12:35:37Z",
    "title_canon_sha256": "ef6116b1c54a233aad3991f929c1669882554bd14ed7cfa679885898de6afc22"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.6470",
    "kind": "arxiv",
    "version": 1
  }
}