Pith Number

pith:PV4NAM5R

pith:2012:PV4NAM5R7EJMAHU7Q3WD2CH2KV

not attested not anchored not stored refs pending

The B36/S125 "2x2" Life-Like Cellular Automaton

Nathaniel Johnston

arxiv:1203.1644 v1 · 2012-03-07 · 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{PV4NAM5R7EJMAHU7Q3WD2CH2KV}

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	2026-05-18T04:00:37.406122Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d78d033b1f912c01e9f86ec3d08fa55565e8d95f8f17c928c0b33f6b1027f32

Aliases

arxiv: 1203.1644 · arxiv_version: 1203.1644v1 · doi: 10.48550/arxiv.1203.1644 · pith_short_12: PV4NAM5R7EJM · pith_short_16: PV4NAM5R7EJMAHU7 · pith_short_8: PV4NAM5R

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/PV4NAM5R7EJMAHU7Q3WD2CH2KV \
  | 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: 7d78d033b1f912c01e9f86ec3d08fa55565e8d95f8f17c928c0b33f6b1027f32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5950be7f6f0a685ba1054a5d87d6815fadb75969b981d92c00aecf9659810b4a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.CG",
    "submitted_at": "2012-03-07T21:55:14Z",
    "title_canon_sha256": "7d497b61438a3868dca543a6e93fafdfe13adb581bb1392b7466c262c3564588"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.1644",
    "kind": "arxiv",
    "version": 1
  }
}