Pith Number

pith:UFTQRZHV

pith:2010:UFTQRZHVPWELSSRQS3RWZAK6DB

not attested not anchored not stored refs pending

The Complexity of Flood Filling Games

Ashley Montanaro, Benjamin Sach, Markus Jalsenius, Raphael Clifford

arxiv:1001.4420 v3 · 2010-01-25 · cs.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{UFTQRZHVPWELSSRQS3RWZAK6DB}

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	2026-05-18T04:20:22.374394Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a16708e4f57d88b94a3096e36c815e187f7db71b0ae79a7de2f05a0a8fea8269

Aliases

arxiv: 1001.4420 · arxiv_version: 1001.4420v3 · doi: 10.48550/arxiv.1001.4420 · pith_short_12: UFTQRZHVPWEL · pith_short_16: UFTQRZHVPWELSSRQ · pith_short_8: UFTQRZHV

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/UFTQRZHVPWELSSRQS3RWZAK6DB \
  | 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: a16708e4f57d88b94a3096e36c815e187f7db71b0ae79a7de2f05a0a8fea8269

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ed2e96e65c8431217cfb9f433f64dcca40cd94f93ee9d3648f0b04bb1d8c913",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2010-01-25T13:40:57Z",
    "title_canon_sha256": "04d92bcd003f1ce9188647cfcfd4b6cccd79718827ce153814ebf849b0080696"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.4420",
    "kind": "arxiv",
    "version": 3
  }
}