Pith Number

pith:QJLZQ2A4

pith:2009:QJLZQ2A4Y6GGETX5VX2THR6LVO

not attested not anchored not stored refs pending

An Experiment in Using Virtual Worlds for Scientific Visualization of Self-Gravitating Systems

Adam Johnson, Jeff Ames, Piet Hut, Will M. Farr

arxiv:0905.1066 v2 · 2009-05-07 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QJLZQ2A4Y6GGETX5VX2THR6LVO}

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	2026-07-04T15:53:14.170159Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

825798681cc78c624efdadf533c7cbab973ab1b6ce86396cc1a989ff0759fef3

Aliases

arxiv: 0905.1066 · arxiv_version: 0905.1066v2 · doi: 10.48550/arxiv.0905.1066 · pith_short_12: QJLZQ2A4Y6GG · pith_short_16: QJLZQ2A4Y6GGETX5 · pith_short_8: QJLZQ2A4

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/QJLZQ2A4Y6GGETX5VX2THR6LVO \
  | 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: 825798681cc78c624efdadf533c7cbab973ab1b6ce86396cc1a989ff0759fef3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "85a454b9a69220ae218f4082cf03e71d0cd6512733dc273e90a74311dce70624",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-05-07T16:40:40Z",
    "title_canon_sha256": "fccfe685f24dbefd8fa458261522cc4d9842a34f21172487a2a873db555b275c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1066",
    "kind": "arxiv",
    "version": 2
  }
}