Pith Number

pith:WHCJR6RD

pith:2013:WHCJR6RDXKVV7DXXCUOSKO7W2T

not attested not anchored not stored refs pending

Playing simple loony dots and boxes endgames optimally

Kevin Buzzard, Michael Ciere

arxiv:1305.2156 v2 · 2013-05-09 · 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{WHCJR6RDXKVV7DXXCUOSKO7W2T}

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	2026-05-18T02:51:48.638137Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b1c498fa23baab5f8ef7151d253bf6d4cf3ae32392da3852300aec3a7aca5c49

Aliases

arxiv: 1305.2156 · arxiv_version: 1305.2156v2 · doi: 10.48550/arxiv.1305.2156 · pith_short_12: WHCJR6RDXKVV · pith_short_16: WHCJR6RDXKVV7DXX · pith_short_8: WHCJR6RD

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/WHCJR6RDXKVV7DXXCUOSKO7W2T \
  | 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: b1c498fa23baab5f8ef7151d253bf6d4cf3ae32392da3852300aec3a7aca5c49

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d99714bcdade433d6107ebf04f2dc2b4d71def57aaf53a74e41e7e3d2ef60be5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-05-09T17:32:36Z",
    "title_canon_sha256": "6f417d2edc78a348e933dc7a58213a26e061c408fb4700247c38dd667bf116bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.2156",
    "kind": "arxiv",
    "version": 2
  }
}