Pith Number

pith:3BQGKHBQ

pith:2009:3BQGKHBQ3QLYOIKDMCSYCRW6Q2

not attested not anchored not stored refs pending

Growing the first bright quasars in cosmological simulations of structure formation

(2) Max-Planck-Institute for Astrophysics, Cambridge, Debora Sijacki (1), Garching), Institute of Astronomy, Martin G. Haehnelt (1) ((1) Kavli Institute for Cosmology, University of Cambridge, Volker Springel (2)

arxiv:0905.1689 v2 · 2009-05-12 · astro-ph.CO · 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{3BQGKHBQ3QLYOIKDMCSYCRW6Q2}

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	2026-05-18T02:13:45.807422Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d860651c30dc1787214360a58146de86b5f715bdc8f08a2660b943554dad9ea6

Aliases

arxiv: 0905.1689 · arxiv_version: 0905.1689v2 · doi: 10.48550/arxiv.0905.1689 · pith_short_12: 3BQGKHBQ3QLY · pith_short_16: 3BQGKHBQ3QLYOIKD · pith_short_8: 3BQGKHBQ

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/3BQGKHBQ3QLYOIKDMCSYCRW6Q2 \
  | 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: d860651c30dc1787214360a58146de86b5f715bdc8f08a2660b943554dad9ea6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7baf18b3be44e7a7fd35126aaafbfd802646098be3b16ba141e7ccd064b5f64",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-12T15:08:24Z",
    "title_canon_sha256": "2b345d519a147206d40694909bbe4f9885fcbbb3896aff248215ecc63c204dd2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1689",
    "kind": "arxiv",
    "version": 2
  }
}