Pith Number

pith:QTNXGAQF

pith:2017:QTNXGAQFIB7A4OSTXDU7OV4K62

not attested not anchored not stored refs pending

A Game of Life on Penrose tilings

Duane A. Bailey, Kathryn A. Lindsey

arxiv:1708.09301 v1 · 2017-08-29 · nlin.CG · cs.IT · math.DS · math.IT · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QTNXGAQFIB7A4OSTXDU7OV4K62}

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	2026-05-18T00:36:20.252554Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84db730205407e0e3a53b8e9f7578af6bac453f9c7a144a98a67d57d4fc5ae86

Aliases

arxiv: 1708.09301 · arxiv_version: 1708.09301v1 · doi: 10.48550/arxiv.1708.09301 · pith_short_12: QTNXGAQFIB7A · pith_short_16: QTNXGAQFIB7A4OST · pith_short_8: QTNXGAQF

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/QTNXGAQFIB7A4OSTXDU7OV4K62 \
  | 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: 84db730205407e0e3a53b8e9f7578af6bac453f9c7a144a98a67d57d4fc5ae86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7de5c94332c530bf9a4718d6381b7bf0139666a57c72fdf26fcda1ac92c5ddaa",
    "cross_cats_sorted": [
      "cs.IT",
      "math.DS",
      "math.IT",
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.CG",
    "submitted_at": "2017-08-29T16:55:31Z",
    "title_canon_sha256": "26bfb3e0a516ffe0f51726f407fdb14180bc1a210fca1a8dfe6fe9bbdaaa4939"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.09301",
    "kind": "arxiv",
    "version": 1
  }
}