Pith Number

pith:7F7QJCIJ

pith:2013:7F7QJCIJJM3YC7USXWON2KNKAB

not attested not anchored not stored refs pending

The Hot and Energetic Universe: The formation and growth of the earliest supermassive black holes

Alberto Moretti, Andrea Comastri, Andrea Merloni, Cristian Vignali, David Alexander, Eros Vanzella, Fabio Vito, Fabrizio Fiore, Francesco Shankar, Ioannis Georgantopoulos, James Aird, Jose Manuel Afonso, Kazushi Iwasawa, Kevin Schawinski, Kirpal Nandra, Mara Salvato, Marcella Brusa, Marta Volonteri, Nico Cappelluti, Paola Severgnini, Ruben Salvaterra

arxiv:1306.2325 v1 · 2013-06-10 · astro-ph.HE · 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{7F7QJCIJJM3YC7USXWON2KNKAB}

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	2026-05-18T03:21:21.387512Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f97f0489094b37817e92bd9cdd29aa004d46396d79b4b2af6669261e7e7aee0a

Aliases

arxiv: 1306.2325 · arxiv_version: 1306.2325v1 · doi: 10.48550/arxiv.1306.2325 · pith_short_12: 7F7QJCIJJM3Y · pith_short_16: 7F7QJCIJJM3YC7US · pith_short_8: 7F7QJCIJ

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/7F7QJCIJJM3YC7USXWON2KNKAB \
  | 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: f97f0489094b37817e92bd9cdd29aa004d46396d79b4b2af6669261e7e7aee0a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3698135c0f72ea5e06a3edfb8ee7af1fd66926e04ae46112faa0167b3529612e",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-06-10T20:01:07Z",
    "title_canon_sha256": "8b718f867a999c4a62a28c92489ffc5756a3a40aae59f7a7e7696521ed2a88f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.2325",
    "kind": "arxiv",
    "version": 1
  }
}