Pith Number

pith:LL6QCAJQ

pith:2004:LL6QCAJQZHDMQKHFGH7SAGMU4K

not attested not anchored not stored refs pending

The anti-hierarchical growth of supermassive black holes

Andrea Merloni (MPA, Garching)

arxiv:astro-ph/0402495 v2 · 2004-02-20 · astro-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{LL6QCAJQZHDMQKHFGH7SAGMU4K}

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	2026-07-04T15:26:25.842052Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5afd010130c9c6c828e531ff201994e290c42b9a1523b34e11c7b2ea7ad7877c

Aliases

arxiv: astro-ph/0402495 · arxiv_version: astro-ph/0402495v2 · doi: 10.48550/arxiv.astro-ph/0402495 · pith_short_12: LL6QCAJQZHDM · pith_short_16: LL6QCAJQZHDMQKHF · pith_short_8: LL6QCAJQ

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/LL6QCAJQZHDMQKHFGH7SAGMU4K \
  | 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: 5afd010130c9c6c828e531ff201994e290c42b9a1523b34e11c7b2ea7ad7877c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18e39ddb45af29b18158f869b2c2e82ac1c371f0615500ec6355bcadb1f9cf91",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-02-20T16:30:40Z",
    "title_canon_sha256": "dc5118d0b1d1f0237f792e9ff3b2161bbe8d032427f5b80596b0c48d6e14cdc8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0402495",
    "kind": "arxiv",
    "version": 2
  }
}