Pith Number

pith:2W77COE7

pith:2015:2W77COE7UOHI2HYXE4D44VHRY4

not attested not anchored not stored refs pending

A Cellular Automaton for Blocking Queen Games

Matthew Cook, Turlough Neary, Urban Larsson

arxiv:1506.01431 v1 · 2015-06-03 · math.CO · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2W77COE7UOHI2HYXE4D44VHRY4}

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	2026-05-18T01:57:41.422587Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5bff1389fa38e8d1f172707ce54f1c7219fededf1701c44d4f34554ccb2906f

Aliases

arxiv: 1506.01431 · arxiv_version: 1506.01431v1 · doi: 10.48550/arxiv.1506.01431 · pith_short_12: 2W77COE7UOHI · pith_short_16: 2W77COE7UOHI2HYX · pith_short_8: 2W77COE7

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/2W77COE7UOHI2HYXE4D44VHRY4 \
  | 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: d5bff1389fa38e8d1f172707ce54f1c7219fededf1701c44d4f34554ccb2906f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ebcdb1ec951e50b34647e5891ded20bf38ca78869892d6ff107787e4a3d8f34",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-06-03T23:17:45Z",
    "title_canon_sha256": "06e1c18a15e111f96c226a94d7013b25c95c29c84aa0b4390d4f916e160321f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.01431",
    "kind": "arxiv",
    "version": 1
  }
}