Pith Number

pith:L67NLDJL

pith:2009:L67NLDJLNB44THH7RDN5B6NZPL

not attested not anchored not stored refs pending

Kolmogorov-Sinai entropy from the ordinal viewpoint

Karsten Keller, Mathieu Sinn

arxiv:0903.0459 v2 · 2009-03-03 · nlin.CD

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{L67NLDJLNB44THH7RDN5B6NZPL}

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	2026-05-18T02:14:37.657341Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5fbed58d2b6879c99cff88dbd0f9b97acf166db0cebd8401bab617e203f75165

Aliases

arxiv: 0903.0459 · arxiv_version: 0903.0459v2 · doi: 10.48550/arxiv.0903.0459 · pith_short_12: L67NLDJLNB44 · pith_short_16: L67NLDJLNB44THH7 · pith_short_8: L67NLDJL

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/L67NLDJLNB44THH7RDN5B6NZPL \
  | 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: 5fbed58d2b6879c99cff88dbd0f9b97acf166db0cebd8401bab617e203f75165

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bdcbd7a2ab180a105915274da379c47836de7d637401011cbd359ac5f7b86179",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.CD",
    "submitted_at": "2009-03-03T08:01:00Z",
    "title_canon_sha256": "882060e296be495958790c1c97e27a99acb9abce5c98673dcdfc430d3d9f613c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.0459",
    "kind": "arxiv",
    "version": 2
  }
}