Pith Number

pith:N2WVPXL3

pith:1993:N2WVPXL3XRRKYTYI62ZE66EYUF

not attested not anchored not stored refs pending

Early Cosmic Formation of Massive Black Holes

A. Loeb, E. L. Turner, M. Umemura

arxiv:astro-ph/9303004 v1 · 1993-03-09 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N2WVPXL3XRRKYTYI62ZE66EYUF}

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.

Cited by

1 paper in Pith

Not-quite-primordial black holes seeded by cosmic string loops

Receipt and verification

First computed	2026-07-04T15:55:05.918789Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ead57dd7bbc62ac4f08f6b24f7898a155412e343f45f3f90bbe2cd1548b58dd

Aliases

arxiv: astro-ph/9303004 · arxiv_version: astro-ph/9303004v1 · doi: 10.48550/arxiv.astro-ph/9303004 · pith_short_12: N2WVPXL3XRRK · pith_short_16: N2WVPXL3XRRKYTYI · pith_short_8: N2WVPXL3

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/N2WVPXL3XRRKYTYI62ZE66EYUF \
  | 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: 6ead57dd7bbc62ac4f08f6b24f7898a155412e343f45f3f90bbe2cd1548b58dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "576858bfb37d978867735625b286e15c21f3d7889cc4910ce5f2d5a80668d6bf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1993-03-09T13:46:00Z",
    "title_canon_sha256": "a8b0cc9e2fa67e83ede7dc73f82768fe01ef4e0936a41f20367e879562564119"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9303004",
    "kind": "arxiv",
    "version": 1
  }
}