Pith Number

pith:HHNEXNJ5

pith:2021:HHNEXNJ5YH7KDUAXHPKIT4L4JB

not attested not anchored not stored refs pending

On the Relation of the Lunar Recession and the Length-of-the-Day

Andre Maeder, Vesselin G. Gueorguiev

arxiv:2110.09037 v1 · 2021-10-18 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HHNEXNJ5YH7KDUAXHPKIT4L4JB}

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	2026-07-05T03:27:05.616161Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39da4bb53dc1fea1d0173bd489f17c4853bedb9302062edb3845a5e7d63836eb

Aliases

arxiv: 2110.09037 · arxiv_version: 2110.09037v1 · doi: 10.48550/arxiv.2110.09037 · pith_short_12: HHNEXNJ5YH7K · pith_short_16: HHNEXNJ5YH7KDUAX · pith_short_8: HHNEXNJ5

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/HHNEXNJ5YH7KDUAXHPKIT4L4JB \
  | 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: 39da4bb53dc1fea1d0173bd489f17c4853bedb9302062edb3845a5e7d63836eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c465897b2a1567dbf0a00224431fd8919fa22e6e4e91ae60c6f48c4f115c0ce1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2021-10-18T06:20:58Z",
    "title_canon_sha256": "da0020517ee7c4469f75b5b127666245333586e4984c4bdf1257c57ca95ea9c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.09037",
    "kind": "arxiv",
    "version": 1
  }
}