Pith Number

pith:GQUPJMNJ

pith:2003:GQUPJMNJHCMBCDYMHF56FY6SKD

not attested not anchored not stored refs pending

The formation of galaxy stellar cores by the hierarchical merging of supermassive black holes

& Francesco Haardt, Marta Volonteri, Piero Madau

arxiv:astro-ph/0304389 v2 · 2003-04-22 · 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{GQUPJMNJHCMBCDYMHF56FY6SKD}

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.

Cited by

1 paper in Pith

Dual AGN and Multiple SMBH Systems in the Era of SKAO

Receipt and verification

First computed	2026-07-04T16:36:54.153456Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3428f4b1a93898110f0c397be2e3d250e29a56047dd5c5411d6e68ca74560eae

Aliases

arxiv: astro-ph/0304389 · arxiv_version: astro-ph/0304389v2 · doi: 10.48550/arxiv.astro-ph/0304389 · pith_short_12: GQUPJMNJHCMB · pith_short_16: GQUPJMNJHCMBCDYM · pith_short_8: GQUPJMNJ

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/GQUPJMNJHCMBCDYMHF56FY6SKD \
  | 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: 3428f4b1a93898110f0c397be2e3d250e29a56047dd5c5411d6e68ca74560eae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f8f94b8cb3ebecfde02545d55bf9d978d82246c3ddfe05d35f38a25ed9e5389",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-04-22T18:16:46Z",
    "title_canon_sha256": "a10d02a31dc8f50f57ab55247616b5915db910614e5c2935b00330523f2325bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0304389",
    "kind": "arxiv",
    "version": 2
  }
}