Pith Number

pith:4XMMU4QU

pith:2013:4XMMU4QUCTNSTL6FYNHKZ67CP7

not attested not anchored not stored refs pending

Unravelling obese black holes in the first galaxies

Andrew J. Davis, Bhaskar Agarwal, James S. Dunlop, Priyamvada Natarajan, Sadegh Khochfar

arxiv:1302.6996 v2 · 2013-02-27 · 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{4XMMU4QUCTNSTL6FYNHKZ67CP7}

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	2026-05-18T01:51:26.469733Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5d8ca721414db29afc5c34eacfbe27fed47710937da9393ab46919c62971d50

Aliases

arxiv: 1302.6996 · arxiv_version: 1302.6996v2 · doi: 10.48550/arxiv.1302.6996 · pith_short_12: 4XMMU4QUCTNS · pith_short_16: 4XMMU4QUCTNSTL6F · pith_short_8: 4XMMU4QU

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/4XMMU4QUCTNSTL6FYNHKZ67CP7 \
  | 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: e5d8ca721414db29afc5c34eacfbe27fed47710937da9393ab46919c62971d50

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74478a28a90b88b58819765713510ee6b5c5790224b40ca3a31380c1625a0ea2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-02-27T21:00:04Z",
    "title_canon_sha256": "25187614a2c1aa828a6bc703d9633fb6f75c5eccb383d9502a2dbb8ff274ccdd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.6996",
    "kind": "arxiv",
    "version": 2
  }
}