Pith Number

pith:E4VKEVS5

pith:2011:E4VKEVS5S34NPQPLJCGJJHEHCE

not attested not anchored not stored refs pending

The Formation of Supermassive Black Holes from Low-Mass Pop III Seeds

Chris L. Fryer, Daniel J. Whalen

arxiv:1112.4598 v2 · 2011-12-20 · 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{E4VKEVS5S34NPQPLJCGJJHEHCE}

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	2026-05-18T01:59:04.895769Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

272aa2565d96f8d7c1eb488c949c8711318ac490c9b90c84b68ea7522f8994f4

Aliases

arxiv: 1112.4598 · arxiv_version: 1112.4598v2 · doi: 10.48550/arxiv.1112.4598 · pith_short_12: E4VKEVS5S34N · pith_short_16: E4VKEVS5S34NPQPL · pith_short_8: E4VKEVS5

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/E4VKEVS5S34NPQPLJCGJJHEHCE \
  | 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: 272aa2565d96f8d7c1eb488c949c8711318ac490c9b90c84b68ea7522f8994f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a888af1e5717f81dbafaf7e04f00f9a052151bc10f23358c0a9b0d38b0d66b7f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-12-20T08:03:25Z",
    "title_canon_sha256": "f868b75a4de0b9a3eb4d015f2eb221dbc5f88f3f3646281f584f096dc53bd644"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.4598",
    "kind": "arxiv",
    "version": 2
  }
}