Pith Number

pith:NPTIXX6B

pith:1999:NPTIXX6BLG2HSFSI7LFLLMNMF6

not attested not anchored not stored refs pending

Totalistic two-dimensional cellular automata exhibiting global periodic behavior

Michel Roger, Nino Boccara

arxiv:adap-org/9904002 v1 · 1999-03-29 · adap-org · nlin.AO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NPTIXX6BLG2HSFSI7LFLLMNMF6}

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	2026-05-18T01:40:48.598469Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6be68bdfc159b4791648facab5b1ac2fac4ea113bd51db6e478c9afa40c98ad6

Aliases

arxiv: adap-org/9904002 · arxiv_version: adap-org/9904002v1 · doi: 10.48550/arxiv.adap-org/9904002 · pith_short_12: NPTIXX6BLG2H · pith_short_16: NPTIXX6BLG2HSFSI · pith_short_8: NPTIXX6B

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/NPTIXX6BLG2HSFSI7LFLLMNMF6 \
  | 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: 6be68bdfc159b4791648facab5b1ac2fac4ea113bd51db6e478c9afa40c98ad6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e935e8d90f8048caaa26902ae312ab010d3e8fa3ae8b0d701c970bb9b6f4758",
    "cross_cats_sorted": [
      "nlin.AO"
    ],
    "license": "",
    "primary_cat": "adap-org",
    "submitted_at": "1999-03-29T15:40:34Z",
    "title_canon_sha256": "50d055c8a087ba4ea3876ba3a40ac8f4b8a13b0d937d368f34cc4cca83a9c083"
  },
  "schema_version": "1.0",
  "source": {
    "id": "adap-org/9904002",
    "kind": "arxiv",
    "version": 1
  }
}