Pith Number

pith:WVLPCEK6

pith:2018:WVLPCEK6GOU7N22Z55FQWF6AOX

not attested not anchored not stored refs pending

Assembly of supermassive black hole seeds

Federico Marinacci, Fernando Becerra, Lars E. Hernquist, Volker Bromm

arxiv:1804.06413 v2 · 2018-04-17 · 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{WVLPCEK6GOU7N22Z55FQWF6AOX}

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	2026-05-18T00:06:28.775326Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b556f1115e33a9f6eb59ef4b0b17c075db8914dda1db6899d6d79e8f1a9d3c06

Aliases

arxiv: 1804.06413 · arxiv_version: 1804.06413v2 · doi: 10.48550/arxiv.1804.06413 · pith_short_12: WVLPCEK6GOU7 · pith_short_16: WVLPCEK6GOU7N22Z · pith_short_8: WVLPCEK6

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/WVLPCEK6GOU7N22Z55FQWF6AOX \
  | 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: b556f1115e33a9f6eb59ef4b0b17c075db8914dda1db6899d6d79e8f1a9d3c06

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "390f0eaed43903117af9e2bcbb090aa7f9eddceae2a8334372e4fbc3a4e97119",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-04-17T18:00:04Z",
    "title_canon_sha256": "70235d98fbf1a75b2b03a1debcb4deff3b854ce9c924e0b88a6024f3bc6f4622"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.06413",
    "kind": "arxiv",
    "version": 2
  }
}