Pith Number

pith:DFC7HFFN

pith:2016:DFC7HFFNKQBJLPQ5OPEL2LO5RP

not attested not anchored not stored refs pending

A weakly universal cellular automaton on the tessellation $\{9,3\}$

Maurice Margenstern

arxiv:1605.09518 v1 · 2016-05-31 · 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{DFC7HFFNKQBJLPQ5OPEL2LO5RP}

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	2026-05-18T01:13:10.727455Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1945f394ad540295be1d73c8bd2ddd8beafb0eee2bd061576227b3869d94549d

Aliases

arxiv: 1605.09518 · arxiv_version: 1605.09518v1 · doi: 10.48550/arxiv.1605.09518 · pith_short_12: DFC7HFFNKQBJ · pith_short_16: DFC7HFFNKQBJLPQ5 · pith_short_8: DFC7HFFN

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/DFC7HFFNKQBJLPQ5OPEL2LO5RP \
  | 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: 1945f394ad540295be1d73c8bd2ddd8beafb0eee2bd061576227b3869d94549d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f470b23648da1b7f4daca06e5c029509d389a1649a1cadee0ebb2e6c8b3f125",
    "cross_cats_sorted": [
      "nlin.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2016-05-31T07:43:41Z",
    "title_canon_sha256": "631d16bb02dc9dfd2b984edb484ed94c1fd52d7c720edc0a7152e651945a53bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1605.09518",
    "kind": "arxiv",
    "version": 1
  }
}