Pith Number

pith:5XZAUBJM

pith:2026:5XZAUBJM2FWKQHUZGA77LX72I4

not attested not anchored not stored refs pending

Penrose P2 Tilings: A Study of Fully Leafed Induced Subtrees

Alain Goupil, Alexandre Blondin Mass\'e, Mathieu Cloutier

arxiv:2603.10172 v2 · 2026-03-10 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5XZAUBJM2FWKQHUZGA77LX72I4}

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	2026-06-12T01:09:24.682572Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

edf20a052cd16ca81e99303ff5dffa470dfc7c8cbfc2a1b8aeafb2884d29fa25

Aliases

arxiv: 2603.10172 · arxiv_version: 2603.10172v2 · doi: 10.48550/arxiv.2603.10172 · pith_short_12: 5XZAUBJM2FWK · pith_short_16: 5XZAUBJM2FWKQHUZ · pith_short_8: 5XZAUBJM

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/5XZAUBJM2FWKQHUZGA77LX72I4 \
  | 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: edf20a052cd16ca81e99303ff5dffa470dfc7c8cbfc2a1b8aeafb2884d29fa25

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "448529999fc53571140959cc745654ec3909625a191f825f6afa10e494dbd6ee",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2026-03-10T19:07:05Z",
    "title_canon_sha256": "3750b830a10e697c0bfe5d1e226a46c8957896e4d86d09a2985058631ea3e94c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.10172",
    "kind": "arxiv",
    "version": 2
  }
}