Pith Number

pith:IE7CB6ZR

pith:2011:IE7CB6ZRN5IBZIBOWSYMWE7QLQ

not attested not anchored not stored refs pending

The Growth of the Stellar Seeds of Supermassive Black Holes

Christopher L. Fryer, Daniel J. Whalen, Hui Li, Jarrett L. Johnson

arxiv:1112.2726 v2 · 2011-12-12 · 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{IE7CB6ZRN5IBZIBOWSYMWE7QLQ}

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	2026-05-18T01:59:11.311589Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

413e20fb316f501ca02eb4b0cb13f05c0c0d3157f0d0e8d4c66a1b02c2c61bed

Aliases

arxiv: 1112.2726 · arxiv_version: 1112.2726v2 · doi: 10.48550/arxiv.1112.2726 · pith_short_12: IE7CB6ZRN5IB · pith_short_16: IE7CB6ZRN5IBZIBO · pith_short_8: IE7CB6ZR

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/IE7CB6ZRN5IBZIBOWSYMWE7QLQ \
  | 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: 413e20fb316f501ca02eb4b0cb13f05c0c0d3157f0d0e8d4c66a1b02c2c61bed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "983b4bd2050a39a3a34232d9f571cb331b5a43ed9e7c8093a16247be0a8ea09d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-12-12T21:46:57Z",
    "title_canon_sha256": "f10f655e46f618ccca4e278cd8f86affdb74f6d14bdb05946804e98d244ddca1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.2726",
    "kind": "arxiv",
    "version": 2
  }
}