Pith Number

pith:L3T7KRW2

pith:2012:L3T7KRW2WZW5FHWHVT5SFYG52Z

not attested not anchored not stored refs pending

Building a Model Astrolabe

Dominic Ford

arxiv:1202.2005 v1 · 2012-02-07 · astro-ph.IM · 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{L3T7KRW2WZW5FHWHVT5SFYG52Z}

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	2026-05-18T04:02:38.549047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5ee7f546dab66dd29ec7acfb22e0ddd6547e9181c4de5eec6e87d05c5193148d

Aliases

arxiv: 1202.2005 · arxiv_version: 1202.2005v1 · doi: 10.48550/arxiv.1202.2005 · pith_short_12: L3T7KRW2WZW5 · pith_short_16: L3T7KRW2WZW5FHWH · pith_short_8: L3T7KRW2

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/L3T7KRW2WZW5FHWHVT5SFYG52Z \
  | 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: 5ee7f546dab66dd29ec7acfb22e0ddd6547e9181c4de5eec6e87d05c5193148d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7e4f18434d7305eb14d0381931084de7940513c9e119bc4c497f2ecc08054d9",
    "cross_cats_sorted": [
      "physics.hist-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-02-07T21:00:04Z",
    "title_canon_sha256": "c39b1a98eb56e7c3f9c56bb0efe7e057bca1e0116e7afce21f4e384fa7cc015a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.2005",
    "kind": "arxiv",
    "version": 1
  }
}