Pith Number

pith:MT74KMFW

pith:2008:MT74KMFWXGSVWJWSOJA5EHBG5A

not attested not anchored not stored refs pending

A short answer to critics of our article "Eppur si espande" [arXiv:astro-ph/0612155]

Audrey Moudens, Jean-Pierre Lasota, Marek A. Abramowicz, Stanislaw Bajtlik

arxiv:0812.3266 v1 · 2008-12-17 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MT74KMFWXGSVWJWSOJA5EHBG5A}

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	2026-07-04T15:34:22.255705Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64ffc530b6b9a55b26d27241d21c26e813aad4948fc8166cb608519101288d92

Aliases

arxiv: 0812.3266 · arxiv_version: 0812.3266v1 · doi: 10.48550/arxiv.0812.3266 · pith_short_12: MT74KMFWXGSV · pith_short_16: MT74KMFWXGSVWJWS · pith_short_8: MT74KMFW

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/MT74KMFWXGSVWJWSOJA5EHBG5A \
  | 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: 64ffc530b6b9a55b26d27241d21c26e813aad4948fc8166cb608519101288d92

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05c05a165cb9d8f1647df3686f695d4913f1ddd0880f6f3840dd0b4133e7fe7d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-12-17T15:15:08Z",
    "title_canon_sha256": "d5ef46c2c8caf77b07bda430cab59c05df6363713672d1d75e4f414912e4ab53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.3266",
    "kind": "arxiv",
    "version": 1
  }
}