Pith Number

pith:B64JNJUY

pith:2015:B64JNJUYSC4Y7MTFCZDUIH2UQZ

not attested not anchored not stored refs pending

From the Scale Model of the Sky to the Armillary Sphere

Alejandro Gangui, Carlos Paez, Roberto Casazza

arxiv:1505.03732 v1 · 2015-05-14 · physics.pop-ph · astro-ph.IM · physics.ed-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{B64JNJUYSC4Y7MTFCZDUIH2UQZ}

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	2026-05-18T00:05:08.163280Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0fb896a69890b98fb2651647441f548669dfacfa7b4bf8f5f75168c12376fd40

Aliases

arxiv: 1505.03732 · arxiv_version: 1505.03732v1 · doi: 10.48550/arxiv.1505.03732 · pith_short_12: B64JNJUYSC4Y · pith_short_16: B64JNJUYSC4Y7MTF · pith_short_8: B64JNJUY

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/B64JNJUYSC4Y7MTFCZDUIH2UQZ \
  | 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: 0fb896a69890b98fb2651647441f548669dfacfa7b4bf8f5f75168c12376fd40

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a84258eacdb252841013da51045e54a6b5b9721aba583ccba9c658908953252",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "physics.ed-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2015-05-14T14:21:57Z",
    "title_canon_sha256": "f2c6039e72476a656c508708f9e4fd0a12a95d392091fe2c44fd723ccf68ebce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.03732",
    "kind": "arxiv",
    "version": 1
  }
}