Pith Number

pith:L5NB6LHP

pith:2013:L5NB6LHPMU2BKMVJJBTJ6TXCF3

not attested not anchored not stored refs pending

The characteristic black hole mass resulting from direct collapse in the early universe

D.R.G. Schleicher, J.C. Niemeyer, M.A. Latif, W. Schmidt

arxiv:1309.1097 v2 · 2013-09-04 · 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{L5NB6LHPMU2BKMVJJBTJ6TXCF3}

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	2026-05-18T01:47:49.794234Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f5a1f2cef65341532a948669f4ee22ec63b964ad75273835e232fef66aa974c

Aliases

arxiv: 1309.1097 · arxiv_version: 1309.1097v2 · doi: 10.48550/arxiv.1309.1097 · pith_short_12: L5NB6LHPMU2B · pith_short_16: L5NB6LHPMU2BKMVJ · pith_short_8: L5NB6LHP

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/L5NB6LHPMU2BKMVJJBTJ6TXCF3 \
  | 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: 5f5a1f2cef65341532a948669f4ee22ec63b964ad75273835e232fef66aa974c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1bbd0157456048b419ae622e28f9ac7f1a894733562f6404009df998d2e51bf3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-09-04T16:43:17Z",
    "title_canon_sha256": "2b91790a100a1584c4b14fc749542e93c37a25c27449a8fcf04ff6f2ed24baf0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.1097",
    "kind": "arxiv",
    "version": 2
  }
}