Pith Number

pith:HCEW4VPD

pith:2011:HCEW4VPD3MPCYDPVQ4MQQ5FH6Z

not attested not anchored not stored refs pending

Clique cover and graph separation: New incompressibility results

Magnus Wahlstr\"om, Marcin Pilipczuk, Marek Cygan, Micha{\l} Pilipczuk, Stefan Kratsch

arxiv:1111.0570 v1 · 2011-11-02 · cs.DS · cs.CC

Open paper page JSON What is a Pith Number?

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

Receipt and verification

First computed	2026-05-18T04:09:44.669156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

38896e55e3db1e2c0df587190874a7f64c8532d681431500679d2031893f65d5

Aliases

arxiv: 1111.0570 · arxiv_version: 1111.0570v1 · doi: 10.48550/arxiv.1111.0570 · pith_short_12: HCEW4VPD3MPC · pith_short_16: HCEW4VPD3MPCYDPV · pith_short_8: HCEW4VPD

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/HCEW4VPD3MPCYDPVQ4MQQ5FH6Z \
  | 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: 38896e55e3db1e2c0df587190874a7f64c8532d681431500679d2031893f65d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19fa1fdc6ec9322bc2a30987ac1c9319af593ceb26a07085c55ac5cd26466cd4",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-11-02T17:28:08Z",
    "title_canon_sha256": "f99ee3c21ee653185f8c1baca02ebccc28718c7aa26eea525170572c1d618df6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.0570",
    "kind": "arxiv",
    "version": 1
  }
}