Pith Number

pith:7JNBRJEY

pith:2012:7JNBRJEY7PCO7UZXHIARYGQHRR

not attested not anchored not stored refs pending

Gerberto e la Geografia Tolemaica

Costantino Sigismondi

arxiv:1211.2747 v1 · 2012-11-12 · physics.hist-ph · 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{7JNBRJEY7PCO7UZXHIARYGQHRR}

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	2026-05-18T03:41:01.921829Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa5a18a498fbc4efd3373a011c1a078c5d2f0b9788204f965d8c7b6168874cb3

Aliases

arxiv: 1211.2747 · arxiv_version: 1211.2747v1 · doi: 10.48550/arxiv.1211.2747 · pith_short_12: 7JNBRJEY7PCO · pith_short_16: 7JNBRJEY7PCO7UZX · pith_short_8: 7JNBRJEY

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/7JNBRJEY7PCO7UZXHIARYGQHRR \
  | 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: fa5a18a498fbc4efd3373a011c1a078c5d2f0b9788204f965d8c7b6168874cb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3e1c3f9ee6f38ba941c2979b8813a8d14a97870d52cea27e5832b17d5b69250",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2012-11-12T19:27:50Z",
    "title_canon_sha256": "e418dfe66ff5191a84d18e5bd9b14c897e3b7a33d910cf02955c9748815fbf56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.2747",
    "kind": "arxiv",
    "version": 1
  }
}