Pith Number

pith:OYJSYUI4

pith:2012:OYJSYUI4OQJD54KFF7SDW5BTBP

not attested not anchored not stored refs pending

The Effect of Spiral Arms on Star Formation in the Galaxy

J. S. Urquhart, L. K. Morgan, M. A. Thompson, T. J. T. Moore

arxiv:1204.1578 v2 · 2012-04-06 · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OYJSYUI4OQJD54KFF7SDW5BTBP}

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	2026-05-18T01:57:56.005227Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76132c511c74123ef1452fe43b74330bf9f8592d4a4997bd839502d1f46e9f72

Aliases

arxiv: 1204.1578 · arxiv_version: 1204.1578v2 · doi: 10.48550/arxiv.1204.1578 · pith_short_12: OYJSYUI4OQJD · pith_short_16: OYJSYUI4OQJD54KF · pith_short_8: OYJSYUI4

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/OYJSYUI4OQJD54KFF7SDW5BTBP \
  | 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: 76132c511c74123ef1452fe43b74330bf9f8592d4a4997bd839502d1f46e9f72

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44b466b0424cf2b39cf467e92f2b30dd80bb6c7c877862644ea297c561ab7b5e",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-04-06T22:59:19Z",
    "title_canon_sha256": "2d187acb8404d6c3efc2372f65234a8ea49a357b5b999f30b6d815849a384bee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1578",
    "kind": "arxiv",
    "version": 2
  }
}