Pith Number

pith:7C7TQWQD

pith:2013:7C7TQWQDVAQTPCYGDEORSBHPM2

not attested not anchored not stored refs pending

Can supermassive black hole seeds form in galaxy mergers?

A. Ferrara, F. Haardt, R. Salvaterra

arxiv:1306.6635 v1 · 2013-06-27 · 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{7C7TQWQDVAQTPCYGDEORSBHPM2}

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	2026-05-18T01:49:06.887601Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8bf385a03a821378b06191d1904ef669c683335b9c2984e8f80c2c6b932fc75

Aliases

arxiv: 1306.6635 · arxiv_version: 1306.6635v1 · doi: 10.48550/arxiv.1306.6635 · pith_short_12: 7C7TQWQDVAQT · pith_short_16: 7C7TQWQDVAQTPCYG · pith_short_8: 7C7TQWQD

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/7C7TQWQDVAQTPCYGDEORSBHPM2 \
  | 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: f8bf385a03a821378b06191d1904ef669c683335b9c2984e8f80c2c6b932fc75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c07af2070770699e50aa1455fec1ac66135af937541a6e3755eb5df9883b4066",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-06-27T20:00:06Z",
    "title_canon_sha256": "b8638e9b12df2bf2d115ad2b278e5ee0b05547d2826d85cc72d47aed1391e867"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.6635",
    "kind": "arxiv",
    "version": 1
  }
}