Pith Number

pith:NMJ6ITXQ

pith:2012:NMJ6ITXQ2OAQHNZYOPLN3VRTK2

not attested not anchored not stored refs pending

Celestial Ephemerides in an Expanding Universe

Columbia, Sergei Kopeikin (University of Missouri, USA)

arxiv:1207.3873 v1 · 2012-07-17 · gr-qc · astro-ph.CO · physics.space-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{NMJ6ITXQ2OAQHNZYOPLN3VRTK2}

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	2026-05-18T03:46:16.414905Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b13e44ef0d38103b73873d6ddd6335689971f1af0fdc1af0573d6b34cc6eb48

Aliases

arxiv: 1207.3873 · arxiv_version: 1207.3873v1 · doi: 10.48550/arxiv.1207.3873 · pith_short_12: NMJ6ITXQ2OAQ · pith_short_16: NMJ6ITXQ2OAQHNZY · pith_short_8: NMJ6ITXQ

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/NMJ6ITXQ2OAQHNZYOPLN3VRTK2 \
  | 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: 6b13e44ef0d38103b73873d6ddd6335689971f1af0fdc1af0573d6b34cc6eb48

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5496ae4409a97b118cc110b2d44076ae74954ce78374e45db0d2f140c0538ac7",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "physics.space-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2012-07-17T04:07:33Z",
    "title_canon_sha256": "ef1dd7a7cdbec2606085c6e315d637082804f8d5369cf4809ed0ab31a5fc1578"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.3873",
    "kind": "arxiv",
    "version": 1
  }
}