Pith Number

pith:KW5CE5BC

pith:2010:KW5CE5BCP2XPUCIZRYARMPAZUW

not attested not anchored not stored refs pending

A Categorical Outlook on Cellular Automata

Silvio Capobianco, Tarmo Uustalu

arxiv:1012.1220 v1 · 2010-12-03 · nlin.CG · cs.LO · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KW5CE5BCP2XPUCIZRYARMPAZUW}

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	2026-05-18T04:34:01.698547Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55ba2274227eaefa09198e01163c19a595c87f010132dab97ab6e78b0fc8a8d9

Aliases

arxiv: 1012.1220 · arxiv_version: 1012.1220v1 · doi: 10.48550/arxiv.1012.1220 · pith_short_12: KW5CE5BCP2XP · pith_short_16: KW5CE5BCP2XPUCIZ · pith_short_8: KW5CE5BC

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/KW5CE5BCP2XPUCIZRYARMPAZUW \
  | 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: 55ba2274227eaefa09198e01163c19a595c87f010132dab97ab6e78b0fc8a8d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec178277f3cef3a7fb6602058baec4950226172157908b6abf7b7e9ff4553ffd",
    "cross_cats_sorted": [
      "cs.LO",
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.CG",
    "submitted_at": "2010-12-03T09:39:32Z",
    "title_canon_sha256": "468e0c77eaeeee17f5fbf229b4f3fbe894229e002f2eb2dcd021f5c1ba5cb315"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.1220",
    "kind": "arxiv",
    "version": 1
  }
}