Pith Number

pith:IIE2XSR3

pith:2008:IIE2XSR3LQZT4MLOEBF232VSME

not attested not anchored not stored refs pending

A note on the Cops & Robber game on graphs embedded in non-orientable surfaces

Dirk Oliver Theis, Gwena\"el Joret, Nancy E. Clarke, Samuel Fiorini

arxiv:0803.0538 v3 · 2008-03-04 · 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{IIE2XSR3LQZT4MLOEBF232VSME}

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	2026-05-18T03:03:55.572609Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4209abca3b5c333e316e204badeab261090b926ef62fc1d35824a8b4711a0dbe

Aliases

arxiv: 0803.0538 · arxiv_version: 0803.0538v3 · doi: 10.48550/arxiv.0803.0538 · pith_short_12: IIE2XSR3LQZT · pith_short_16: IIE2XSR3LQZT4MLO · pith_short_8: IIE2XSR3

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/IIE2XSR3LQZT4MLOEBF232VSME \
  | 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: 4209abca3b5c333e316e204badeab261090b926ef62fc1d35824a8b4711a0dbe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12dfd7b185ddfc051adaadb29f9bea16509dc536977e41620fd16a5ff6939eae",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2008-03-04T20:32:39Z",
    "title_canon_sha256": "ddfbe6dbf576ead383fb71d3c2f52bee8e91507a03e2eb64ffb647ba55bc2b0f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0803.0538",
    "kind": "arxiv",
    "version": 3
  }
}