Pith Number

pith:EX7F7XQM

pith:2012:EX7F7XQMYVJQALCO3XU5UGFYRD

not attested not anchored not stored refs pending

Maharaja Nim, Wythoff's Queen meets the Knight

Johan W\"astlund, Urban Larsson

arxiv:1207.0765 v1 · 2012-07-03 · 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{EX7F7XQMYVJQALCO3XU5UGFYRD}

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	2026-05-18T03:51:49.122052Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25fe5fde0cc553002c4edde9da18b888c7d7206591c861230741bce1f9edef67

Aliases

arxiv: 1207.0765 · arxiv_version: 1207.0765v1 · doi: 10.48550/arxiv.1207.0765 · pith_short_12: EX7F7XQMYVJQ · pith_short_16: EX7F7XQMYVJQALCO · pith_short_8: EX7F7XQM

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/EX7F7XQMYVJQALCO3XU5UGFYRD \
  | 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: 25fe5fde0cc553002c4edde9da18b888c7d7206591c861230741bce1f9edef67

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0eb9e1ad53ac315669320f4a32bef7a9d371ac3e0ccd689540c6c166c1998e2f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-07-03T17:49:14Z",
    "title_canon_sha256": "28ede649c2b6db5d80dc7a9898e8aa70fe8c79b2dacce87174bdc8d32ee50205"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.0765",
    "kind": "arxiv",
    "version": 1
  }
}