Pith Number

pith:5KHCXDXD

pith:2014:5KHCXDXDELPVXFVA6Z3XBOESNM

not attested not anchored not stored refs pending

The Direct Collapse of a Massive Black Hole Seed Under the Influence of an Anisotropic Lyman-Werner Source

John A. Regan, John H. Wise, Peter H. Johansson

arxiv:1407.4472 v2 · 2014-07-16 · 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{5KHCXDXDELPVXFVA6Z3XBOESNM}

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	2026-05-18T01:42:35.977771Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea8e2b8ee322df5b96a0f67770b8926b173bb17ba58dcbae4891ec9c00a3b3b3

Aliases

arxiv: 1407.4472 · arxiv_version: 1407.4472v2 · doi: 10.48550/arxiv.1407.4472 · pith_short_12: 5KHCXDXDELPV · pith_short_16: 5KHCXDXDELPVXFVA · pith_short_8: 5KHCXDXD

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/5KHCXDXDELPVXFVA6Z3XBOESNM \
  | 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: ea8e2b8ee322df5b96a0f67770b8926b173bb17ba58dcbae4891ec9c00a3b3b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f78ec3b3cf843a0f103d334c74d524ce78075b21eab22090c3b78bfe3519b5e",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2014-07-16T20:00:28Z",
    "title_canon_sha256": "23573dede57ab84ab91f52adbf240169a240054825afcc44db93dfccf00b8c0b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.4472",
    "kind": "arxiv",
    "version": 2
  }
}