Pith Number

pith:VH34WWQR

pith:2020:VH34WWQRXAMIOMD77LEH5BGUN3

not attested not anchored not stored refs pending

A (not so) brief history of lunar distances: Lunar longitude determination at sea before the chronometer

Australia), Richard de Grijs (Macquarie University, Sydney

arxiv:2007.14504 v1 · 2020-07-28 · physics.hist-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{VH34WWQRXAMIOMD77LEH5BGUN3}

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	2026-07-05T01:23:16.195882Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9f7cb5a11b81887307ffac87e84d46ef68315c6cbf3d4fc3fb5b670bae422e9

Aliases

arxiv: 2007.14504 · arxiv_version: 2007.14504v1 · doi: 10.48550/arxiv.2007.14504 · pith_short_12: VH34WWQRXAMI · pith_short_16: VH34WWQRXAMIOMD7 · pith_short_8: VH34WWQR

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/VH34WWQRXAMIOMD77LEH5BGUN3 \
  | 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: a9f7cb5a11b81887307ffac87e84d46ef68315c6cbf3d4fc3fb5b670bae422e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "829838961381c64c42a7ba65d81768cf9155af3cf181269fdfe8e34ae756da54",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2020-07-28T22:19:56Z",
    "title_canon_sha256": "9888d91d50d6c3f32bd5ca57a862f1337f40444db900d947716698b7fb588a12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.14504",
    "kind": "arxiv",
    "version": 1
  }
}