Pith Number

pith:M674Y6WP

pith:2007:M674Y6WPMKNBVDVMIVVI7BXSKB

not attested not anchored not stored refs pending

On a characterization of cellular automata in tilings of the hyperbolic plane

Maurice Margenstern

arxiv:cs/0702155 v1 · 2007-02-27 · cs.DM · cs.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{M674Y6WPMKNBVDVMIVVI7BXSKB}

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	2026-05-18T04:25:38.010848Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67bfcc7acf629a1a8eac456a8f86f250435faaf5504be7f99ee619f045781a2b

Aliases

arxiv: cs/0702155 · arxiv_version: cs/0702155v1 · doi: 10.48550/arxiv.cs/0702155 · pith_short_12: M674Y6WPMKNB · pith_short_16: M674Y6WPMKNBVDVM · pith_short_8: M674Y6WP

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/M674Y6WPMKNBVDVMIVVI7BXSKB \
  | 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: 67bfcc7acf629a1a8eac456a8f86f250435faaf5504be7f99ee619f045781a2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "578c052d166e0a0aae905c0d7fc953ba94387b3fd052a8f645f092a6ae67ad50",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "",
    "primary_cat": "cs.DM",
    "submitted_at": "2007-02-27T09:17:05Z",
    "title_canon_sha256": "b0fe6e2ad6a27f7a40b9ae59172bce1c61c2c279279af291c33010700d0a8604"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0702155",
    "kind": "arxiv",
    "version": 1
  }
}