Pith Number

pith:NWGTWFTC

pith:2017:NWGTWFTCT66LMQWWSY7V5JSLOT

not attested not anchored not stored refs pending

Helly Numbers of Polyominoes

Hiro Ito, Jean Cardinal, Matias Korman, Stefan Langerman

arxiv:1708.06063 v1 · 2017-08-21 · 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{NWGTWFTCT66LMQWWSY7V5JSLOT}

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	2026-05-18T00:37:43.365674Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d8d3b16629fbcb642d6963f5ea64b74cadc563855816cdc5c993c0ce5a701cb

Aliases

arxiv: 1708.06063 · arxiv_version: 1708.06063v1 · doi: 10.48550/arxiv.1708.06063 · pith_short_12: NWGTWFTCT66L · pith_short_16: NWGTWFTCT66LMQWW · pith_short_8: NWGTWFTC

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/NWGTWFTCT66LMQWWSY7V5JSLOT \
  | 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: 6d8d3b16629fbcb642d6963f5ea64b74cadc563855816cdc5c993c0ce5a701cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1966f94ee8cea81ee9e5eed54d78736ce14a41a1dc844f29963dcb5cbe46828",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2017-08-21T02:28:10Z",
    "title_canon_sha256": "ac124212786783a6c7399240874439880ec6c773cb398492ae5ec9d1fe657a71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.06063",
    "kind": "arxiv",
    "version": 1
  }
}