Pith Number

pith:V6BKLJ3X

pith:2011:V6BKLJ3XK5BFHNHYVDVGMFUEFS

not attested not anchored not stored refs pending

The First Massive Black Hole Seeds and Their Hosts

Fabio Governato, James Wadsley, Jillian Bellovary, Marta Volonteri, Sijing Shen, Thomas Quinn

arxiv:1104.3858 v2 · 2011-04-19 · astro-ph.CO · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{V6BKLJ3XK5BFHNHYVDVGMFUEFS}

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	2026-05-18T02:02:22.513402Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af82a5a777574253b4f8a8ea6616842c8d67ef852178f24d3c3755ae4709c990

Aliases

arxiv: 1104.3858 · arxiv_version: 1104.3858v2 · doi: 10.48550/arxiv.1104.3858 · pith_short_12: V6BKLJ3XK5BF · pith_short_16: V6BKLJ3XK5BFHNHY · pith_short_8: V6BKLJ3X

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/V6BKLJ3XK5BFHNHYVDVGMFUEFS \
  | 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: af82a5a777574253b4f8a8ea6616842c8d67ef852178f24d3c3755ae4709c990

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9bb7fa0a78c05106a4dcb1c07c27a5768b3588bdac38aae5c84fd4d6f2188a34",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-19T20:00:00Z",
    "title_canon_sha256": "4a843dc86c9ac54068fdb37d9a53ec0030f7026c7eb1d33e9aa86d9477de509f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.3858",
    "kind": "arxiv",
    "version": 2
  }
}