Pith Number

pith:MQAEYUIK

pith:2009:MQAEYUIKCPQHHYZXR4JJPFVGNJ

not attested not anchored not stored refs pending

Stability of pulsar rotational and orbital periods

Sergei Kopeikin (University of Missouri-Columbia, USA)

arxiv:0909.1054 v1 · 2009-09-05 · astro-ph.SR · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MQAEYUIKCPQHHYZXR4JJPFVGNJ}

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	2026-05-18T02:11:59.410281Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64004c510a13e073e3378f129796a66a69f34e1b473453631f52bb28169af5ae

Aliases

arxiv: 0909.1054 · arxiv_version: 0909.1054v1 · doi: 10.48550/arxiv.0909.1054 · pith_short_12: MQAEYUIKCPQH · pith_short_16: MQAEYUIKCPQHHYZX · pith_short_8: MQAEYUIK

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/MQAEYUIKCPQHHYZXR4JJPFVGNJ \
  | 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: 64004c510a13e073e3378f129796a66a69f34e1b473453631f52bb28169af5ae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e67d3fc468968e448864648eb99f29239cb24102744bb950e1d3a01c6d1ff307",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-05T19:56:56Z",
    "title_canon_sha256": "cd37dc9272f4784ec3f53f483a483b9ab98a31f8acc946a957a963b6e2f99d26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1054",
    "kind": "arxiv",
    "version": 1
  }
}