Pith Number

pith:NXIYO53U

pith:2018:NXIYO53U5FGMZLDZX67CSFHAVF

not attested not anchored not stored refs pending

The seeds of supermassive black holes and the role of local radiation and metal spreading

B. Ciardi, M. Petkova, S. Borgani, U. Maio

arxiv:1811.01964 v3 · 2018-11-05 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NXIYO53U5FGMZLDZX67CSFHAVF}

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	2026-05-17T23:44:58.662331Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6dd1877774e94cccac79bfbe2914e0a95137b5d895964661345cf4e94e47e92b

Aliases

arxiv: 1811.01964 · arxiv_version: 1811.01964v3 · doi: 10.48550/arxiv.1811.01964 · pith_short_12: NXIYO53U5FGM · pith_short_16: NXIYO53U5FGMZLDZ · pith_short_8: NXIYO53U

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/NXIYO53U5FGMZLDZX67CSFHAVF \
  | 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: 6dd1877774e94cccac79bfbe2914e0a95137b5d895964661345cf4e94e47e92b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3698ccd3738da63a45a1ffca521b9d6d076b703db2136da3e7cc9315f39ddc17",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-11-05T19:00:04Z",
    "title_canon_sha256": "d20695062c7c79e44063540fdaa3947ab017abf1041224d1648e1d6c7922b678"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.01964",
    "kind": "arxiv",
    "version": 3
  }
}