Pith Number

pith:Q3VGR3ZT

pith:2015:Q3VGR3ZTJ3OWROO4WBELVCC4HS

not attested not anchored not stored refs pending

New constraints on direct collapse black hole formation in the early Universe

Bhaskar Agarwal, Britton Smith, Priyamvada Natarajan, Sadegh Khochfar, Simon Glover

arxiv:1504.04042 v2 · 2015-04-15 · 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{Q3VGR3ZTJ3OWROO4WBELVCC4HS}

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

2 papers in Pith

Direct Collapse Black Hole Candidates from Decaying Dark Matter

A "Black Hole Star" Reveals the Remarkable Gas-Enshrouded Hearts of the Little Red Dots

Receipt and verification

First computed	2026-05-18T01:10:23.822168Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86ea68ef334edd68b9dcb048ba885c3cbc662c4f189bc42d59ac7048a6d3ba4d

Aliases

arxiv: 1504.04042 · arxiv_version: 1504.04042v2 · doi: 10.48550/arxiv.1504.04042 · pith_short_12: Q3VGR3ZTJ3OW · pith_short_16: Q3VGR3ZTJ3OWROO4 · pith_short_8: Q3VGR3ZT

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/Q3VGR3ZTJ3OWROO4WBELVCC4HS \
  | 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: 86ea68ef334edd68b9dcb048ba885c3cbc662c4f189bc42d59ac7048a6d3ba4d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ca3abd587c9ae8dee40032ea7d928d061cf8d589568899a7066e89279f1ffa9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-04-15T20:26:24Z",
    "title_canon_sha256": "d7ba76a4842dcc43d050b00922a2bcfd6802c5f887a17feb1253ba4c094fe055"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.04042",
    "kind": "arxiv",
    "version": 2
  }
}