Pith Number

pith:G653NGYK

pith:2019:G653NGYKNMPTEHVMJHV46W3Y24

not attested not anchored not stored refs pending

The smallest art gallery not guarded by every third vertex

Ralph Morrison

arxiv:1908.01705 v1 · 2019-08-05 · 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{G653NGYKNMPTEHVMJHV46W3Y24}

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	2026-07-04T23:51:32.745895Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

37bbb69b0a6b1f321eac49ebcf5b78d7191b4be92846060847b6b6f8ffdf43b8

Aliases

arxiv: 1908.01705 · arxiv_version: 1908.01705v1 · doi: 10.48550/arxiv.1908.01705 · pith_short_12: G653NGYKNMPT · pith_short_16: G653NGYKNMPTEHVM · pith_short_8: G653NGYK

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/G653NGYKNMPTEHVMJHV46W3Y24 \
  | 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: 37bbb69b0a6b1f321eac49ebcf5b78d7191b4be92846060847b6b6f8ffdf43b8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29585ae5c392aa64cfc66c38d682ddfa57c51f865e09ce14945cc3d1328c155f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-08-05T15:57:25Z",
    "title_canon_sha256": "73e120b5b5a535ade7fb8fa818a6b502ec7535ac52de20153df7d471b525f882"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01705",
    "kind": "arxiv",
    "version": 1
  }
}