Pith Number

pith:BUOMQJKA

pith:2011:BUOMQJKADPQAXLQGOUQ2TU5NPO

not attested not anchored not stored refs pending

A Discrete Evolutionary Model for Chess Players' Ratings

George Loizou, Mark Levene, Trevor Fenner

arxiv:1103.1530 v2 · 2011-03-08 · physics.soc-ph · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BUOMQJKADPQAXLQGOUQ2TU5NPO}

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	2026-05-18T04:25:27.723207Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d1cc825401be00bae067521a9d3ad7bbc4e84923a5ad513609c4bbc5a3cbd5c

Aliases

arxiv: 1103.1530 · arxiv_version: 1103.1530v2 · doi: 10.48550/arxiv.1103.1530 · pith_short_12: BUOMQJKADPQA · pith_short_16: BUOMQJKADPQAXLQG · pith_short_8: BUOMQJKA

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/BUOMQJKADPQAXLQGOUQ2TU5NPO \
  | 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: 0d1cc825401be00bae067521a9d3ad7bbc4e84923a5ad513609c4bbc5a3cbd5c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb349f67bdbb32c500bcd8ab178b301665a8b8e7dbf249a375716d04240df07f",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2011-03-08T13:51:46Z",
    "title_canon_sha256": "b0c027372b77bde752f330951289c2a95859df8640f8669ba2be54443587aaeb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.1530",
    "kind": "arxiv",
    "version": 2
  }
}