Pith Number

pith:V7CU2AMF

pith:2009:V7CU2AMFSTMBBAH5HVCFAOJMAL

not attested not anchored not stored refs pending

Prominent spiral arms in the gaseous outer galaxy disks

G. Bertin, N. C. Amorisco

arxiv:0912.3178 v1 · 2009-12-16 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{V7CU2AMFSTMBBAH5HVCFAOJMAL}

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	2026-05-18T04:41:14.129873Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

afc54d018594d81080fd3d4450392c02cfcc011567b3c6a30deffa56507941f1

Aliases

arxiv: 0912.3178 · arxiv_version: 0912.3178v1 · doi: 10.48550/arxiv.0912.3178 · pith_short_12: V7CU2AMFSTMB · pith_short_16: V7CU2AMFSTMBBAH5 · pith_short_8: V7CU2AMF

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/V7CU2AMFSTMBBAH5HVCFAOJMAL \
  | 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: afc54d018594d81080fd3d4450392c02cfcc011567b3c6a30deffa56507941f1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fafdffa2384bdf4a201b2b388a864a8a3db481e8c81463d264d7b002dfebc47",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-16T16:18:53Z",
    "title_canon_sha256": "7689b3f3cd15533fba3f4eacee690f238c1e10315aa96663e7efb6fccdf6e21d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.3178",
    "kind": "arxiv",
    "version": 1
  }
}