Pith Number

pith:ICPC4HYS

pith:2008:ICPC4HYS3SEXL3OOSOIYQA6JIA

not attested not anchored not stored refs pending

Velocity dispersions in a cluster of stars: How fast could Usain Bolt have run?

H. K. Eriksen, I. K. Wehus, J. R. Kristiansen, O. Langangen

arxiv:0809.0209 v2 · 2008-09-01 · physics.pop-ph · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ICPC4HYS3SEXL3OOSOIYQA6JIA}

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	2026-07-04T15:39:13.403721Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

409e2e1f12dc8975edce93918803c94003a581255c197515e9c6d356a5008648

Aliases

arxiv: 0809.0209 · arxiv_version: 0809.0209v2 · doi: 10.48550/arxiv.0809.0209 · pith_short_12: ICPC4HYS3SEX · pith_short_16: ICPC4HYS3SEXL3OO · pith_short_8: ICPC4HYS

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/ICPC4HYS3SEXL3OOSOIYQA6JIA \
  | 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: 409e2e1f12dc8975edce93918803c94003a581255c197515e9c6d356a5008648

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df28c4547d91ec1b367d92b34db249e51f55905bc2a0aca02cdddab99c3c8bf9",
    "cross_cats_sorted": [
      "astro-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2008-09-01T11:22:17Z",
    "title_canon_sha256": "22ebf3b978885152a7c75fa9455d44272e0985bdd34d054d83ee0b31db28a9ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.0209",
    "kind": "arxiv",
    "version": 2
  }
}