Pith Number

pith:DJFVN7HZ

pith:2020:DJFVN7HZTUX7MNEQ3IFLAZKL2Q

not attested not anchored not stored refs pending

The Formation of the First Quasars. I. The Black Hole Seeds, Accretion and Feedback Models

Hidenobu Yajima, Lars Hernquist, Moupiya Maji, Qirong Zhu, Raffaella Schneider, Yiting Li, Yuexing Li

arxiv:2012.01458 v1 · 2020-12-02 · 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{DJFVN7HZTUX7MNEQ3IFLAZKL2Q}

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

A prevalent population of normal-mass central black holes in high-redshift massive galaxies

Receipt and verification

First computed	2026-07-05T01:56:46.332352Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a4b56fcf99d2ff63490da0ab0654bd41a716ad8dff1aefe00d3ea13964ff2ca

Aliases

arxiv: 2012.01458 · arxiv_version: 2012.01458v1 · doi: 10.48550/arxiv.2012.01458 · pith_short_12: DJFVN7HZTUX7 · pith_short_16: DJFVN7HZTUX7MNEQ · pith_short_8: DJFVN7HZ

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/DJFVN7HZTUX7MNEQ3IFLAZKL2Q \
  | 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: 1a4b56fcf99d2ff63490da0ab0654bd41a716ad8dff1aefe00d3ea13964ff2ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c652210a5f12623e0da11ed04fa9df992186f38e1ce0f6ffda3c6bdded9aa015",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-12-02T19:02:47Z",
    "title_canon_sha256": "67aa4c4fadad1481b9f7dcd96b00187643c586c52a03de589986e37188c26fa0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.01458",
    "kind": "arxiv",
    "version": 1
  }
}