Pith Number

pith:UHJ2QZ64

pith:2016:UHJ2QZ64QRVYNOHJCDZJ2RSKGZ

not attested not anchored not stored refs pending

The Early Growth of the First Black Holes

Francesco Haardt (Universita dell'Insubria), Jarrett L. Johnson (LANL)

arxiv:1601.05473 v2 · 2016-01-20 · 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{UHJ2QZ64QRVYNOHJCDZJ2RSKGZ}

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

Estimating the spins of supermassive black holes in distant ultraluminous quasars

Receipt and verification

First computed	2026-05-18T01:18:38.232480Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1d3a867dc846b86b8e910f29d464a3671331a00dc90c0166f2fde6e1b4b0cb6

Aliases

arxiv: 1601.05473 · arxiv_version: 1601.05473v2 · doi: 10.48550/arxiv.1601.05473 · pith_short_12: UHJ2QZ64QRVY · pith_short_16: UHJ2QZ64QRVYNOHJ · pith_short_8: UHJ2QZ64

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/UHJ2QZ64QRVYNOHJCDZJ2RSKGZ \
  | 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: a1d3a867dc846b86b8e910f29d464a3671331a00dc90c0166f2fde6e1b4b0cb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "70cca54ca804a92bc3b8cd17add61992f31ea2cf7f962985dc904901099d2455",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-01-20T23:36:25Z",
    "title_canon_sha256": "e92ab20168001d92718cb2f85c378128eb8eb23d90944e651921f783188f6599"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.05473",
    "kind": "arxiv",
    "version": 2
  }
}