Pith Number

pith:5XQLPXMA

pith:2012:5XQLPXMARJNXFDTE3ZA26BQT2S

not attested not anchored not stored refs pending

Fast Hamiltonicity checking via bases of perfect matchings

Jesper Nederlof, Marek Cygan, Stefan Kratsch

arxiv:1211.1506 v1 · 2012-11-07 · cs.DS · cs.CC · cs.DM

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	2026-05-18T03:41:20.831936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ede0b7dd808a5b728e64de41af0613d49b67d2dd8b57f60733a71dde99610886

Aliases

arxiv: 1211.1506 · arxiv_version: 1211.1506v1 · doi: 10.48550/arxiv.1211.1506 · pith_short_12: 5XQLPXMARJNX · pith_short_16: 5XQLPXMARJNXFDTE · pith_short_8: 5XQLPXMA

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/5XQLPXMARJNXFDTE3ZA26BQT2S \
  | 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: ede0b7dd808a5b728e64de41af0613d49b67d2dd8b57f60733a71dde99610886

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5978850892ee3a3afa059953d75f065eaf6d5d4462e6675755089dddcdf2b132",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-11-07T10:39:24Z",
    "title_canon_sha256": "3d7ca3fc99cf851074da24f510581dbd5cab2a4283723f6034b91036f3cbb515"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.1506",
    "kind": "arxiv",
    "version": 1
  }
}