Pith Number

pith:5TH6MMJY

pith:2019:5TH6MMJYPLHRLXU6FQPJX2B5GV

not attested not anchored not stored refs pending

The first Super Massive Black Holes: indications from models for future observations

Andrew Griffin, Bruno Henriques, Cedric Lacey, Ciro Pappalardo, Claudia del P. Lagos, Hugo Messias, Israel Matute, Jos\'e Afonso, Marta Volonteri, Ranga-Ram Chary, Ray P. Norris, Stergios Amarantidis, Violeta Gonzalez-Perez, Yohan Dubois, YuXiang Qin

arxiv:1902.07982 v1 · 2019-02-21 · 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{5TH6MMJYPLHRLXU6FQPJX2B5GV}

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	2026-05-17T23:52:01.063088Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eccfe631387acf15de9e2c1e9be83d357ccd5b29a2949f814870539d4cee336b

Aliases

arxiv: 1902.07982 · arxiv_version: 1902.07982v1 · doi: 10.48550/arxiv.1902.07982 · pith_short_12: 5TH6MMJYPLHR · pith_short_16: 5TH6MMJYPLHRLXU6 · pith_short_8: 5TH6MMJY

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/5TH6MMJYPLHRLXU6FQPJX2B5GV \
  | 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: eccfe631387acf15de9e2c1e9be83d357ccd5b29a2949f814870539d4cee336b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1321a33ddcf9fe84bade2ade134600d9214fab2ff0f875c3deb4c65df7b5054",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-02-21T11:47:26Z",
    "title_canon_sha256": "0f56d4b5f5af4554a137a1f733f99be23c4607a509bff59da2f4f0a1c7a7bb19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.07982",
    "kind": "arxiv",
    "version": 1
  }
}