Pith Number

pith:GPFXYG46

pith:2016:GPFXYG46W57N64I3SY6QJNW6M6

not attested not anchored not stored refs pending

Evidence for a direct collapse black hole in the Lyman-alpha source CR7

Aaron Smith, Abraham Loeb, Volker Bromm

arxiv:1602.07639 v2 · 2016-02-24 · 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{GPFXYG46W57N64I3SY6QJNW6M6}

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	2026-05-18T01:10:30.993815Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

33cb7c1b9eb77edf711b963d04b6de67a23a1ebc633a968c1d7786395d15ac71

Aliases

arxiv: 1602.07639 · arxiv_version: 1602.07639v2 · doi: 10.48550/arxiv.1602.07639 · pith_short_12: GPFXYG46W57N · pith_short_16: GPFXYG46W57N64I3 · pith_short_8: GPFXYG46

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/GPFXYG46W57N64I3SY6QJNW6M6 \
  | 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: 33cb7c1b9eb77edf711b963d04b6de67a23a1ebc633a968c1d7786395d15ac71

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "72cc5c8c47a982fe31157608e83e9a821bb8c5d98fd2d876561c2465e0d9e6cc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-02-24T19:12:17Z",
    "title_canon_sha256": "3144242ed1c0f3fc532c6c98f9ff89dca56630370f744e79efcbf8733b82e327"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.07639",
    "kind": "arxiv",
    "version": 2
  }
}