Pith Number

pith:YX3NTCXA

pith:2019:YX3NTCXASTGBCRBDJ6MNM2JHRZ

not attested not anchored not stored refs pending

Why Halley did not discover proper motion and why Cassini did

Frank Verbunt, Marc van der Sluys

arxiv:1909.13636 v1 · 2019-08-29 · physics.hist-ph · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YX3NTCXASTGBCRBDJ6MNM2JHRZ}

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	2026-07-05T00:08:12.262284Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5f6d98ae094cc1144234f98d669278e7a88a7c7a6afa5a1aba32d282948f063

Aliases

arxiv: 1909.13636 · arxiv_version: 1909.13636v1 · doi: 10.48550/arxiv.1909.13636 · pith_short_12: YX3NTCXASTGB · pith_short_16: YX3NTCXASTGBCRBD · pith_short_8: YX3NTCXA

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/YX3NTCXASTGBCRBDJ6MNM2JHRZ \
  | 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: c5f6d98ae094cc1144234f98d669278e7a88a7c7a6afa5a1aba32d282948f063

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "76cc26d30b27055fa0967c5eda196c833f36a693340a81e4c4fca1cf7a9e6468",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2019-08-29T13:40:31Z",
    "title_canon_sha256": "eb4936af143755780b177e91717adb7acf9c12f1890815d86dd90734e0d3ad93"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.13636",
    "kind": "arxiv",
    "version": 1
  }
}