Pith Number

pith:XTWK5P2K

pith:2014:XTWK5P2K26LIN73DYWYPMSMLEB

not attested not anchored not stored refs pending

The brief era of direct collapse black hole formation

Andrea Ferrara, Bin Yue, Ruben Salvaterra, Xuelei Chen, Yidong Xu

arxiv:1402.5675 v1 · 2014-02-23 · 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{XTWK5P2K26LIN73DYWYPMSMLEB}

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	2026-05-18T01:44:29.216743Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bcecaebf4ad79686ff63c5b0f6498b2056d68a5c80ea2d1ddc9ff70e4b6f67e5

Aliases

arxiv: 1402.5675 · arxiv_version: 1402.5675v1 · doi: 10.48550/arxiv.1402.5675 · pith_short_12: XTWK5P2K26LI · pith_short_16: XTWK5P2K26LIN73D · pith_short_8: XTWK5P2K

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/XTWK5P2K26LIN73DYWYPMSMLEB \
  | 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: bcecaebf4ad79686ff63c5b0f6498b2056d68a5c80ea2d1ddc9ff70e4b6f67e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c050106f92571b1c422bdda54016b72fda48aea7c4d189fdc272531d0f9e2450",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2014-02-23T21:04:47Z",
    "title_canon_sha256": "05cce5a39f85fb63588836c8893169e37eb45cd13d4164325448a6c7d9e683a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.5675",
    "kind": "arxiv",
    "version": 1
  }
}