Pith Number

pith:T4WF7GHT

pith:2015:T4WF7GHTZ4LW6YAKHO56NP265W

not attested not anchored not stored refs pending

Lower bounds for the parameterized complexity of Minimum Fill-in and other completion problems

Ivan Bliznets, Lukas Mach, Marek Cygan, Michal Pilipczuk, Pawel Komosa

arxiv:1508.05282 v2 · 2015-08-21 · cs.CC · cs.DS

Open paper page JSON Open Graph Bundle Merged state 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

✓ 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	2026-05-18T01:30:07.772825Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f2c5f98f3cf176f600a3bbbe6bf5eed9e4a9537700ed4e4e697e340073c4f44

Aliases

arxiv: 1508.05282 · arxiv_version: 1508.05282v2 · doi: 10.48550/arxiv.1508.05282 · pith_short_12: T4WF7GHTZ4LW · pith_short_16: T4WF7GHTZ4LW6YAK · pith_short_8: T4WF7GHT

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/T4WF7GHTZ4LW6YAKHO56NP265W \
  | 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: 9f2c5f98f3cf176f600a3bbbe6bf5eed9e4a9537700ed4e4e697e340073c4f44

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eab6d688676495b4d2c343c58a8162ec63420b24ee4234e82b3a8d95b67394d4",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2015-08-21T14:29:21Z",
    "title_canon_sha256": "4fb8ffd43cab31d1ebed58f66446b53735d0a34b6b5a59c2b2d7dd8850dfad20"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05282",
    "kind": "arxiv",
    "version": 2
  }
}