Pith Number

pith:DBKVQAH4

pith:2014:DBKVQAH4J2EWNDZUGY26SSL3OR

not attested not anchored not stored refs pending

A weakly universal cellular automaton in the heptagrid with three states

Maurice Margenstern

arxiv:1410.1864 v1 · 2014-10-07 · cs.DM · nlin.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DBKVQAH4J2EWNDZUGY26SSL3OR}

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	2026-05-18T02:40:54.587273Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18555800fc4e89668f343635e9497b744892545d2c7c6aebfd5ba3f7ac848c5f

Aliases

arxiv: 1410.1864 · arxiv_version: 1410.1864v1 · doi: 10.48550/arxiv.1410.1864 · pith_short_12: DBKVQAH4J2EW · pith_short_16: DBKVQAH4J2EWNDZU · pith_short_8: DBKVQAH4

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/DBKVQAH4J2EWNDZUGY26SSL3OR \
  | 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: 18555800fc4e89668f343635e9497b744892545d2c7c6aebfd5ba3f7ac848c5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6e5c49e2d17462c03cacfbfa4f0b78e18babdec30a6697a8b33c4668086a01d",
    "cross_cats_sorted": [
      "nlin.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2014-10-07T19:54:18Z",
    "title_canon_sha256": "1b3c1bd455b257423241cfa7040c9ddf0eb18d86f7ef5f2085122a0491fb73be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1410.1864",
    "kind": "arxiv",
    "version": 1
  }
}