Pith Number

pith:3YHGSRVZ

pith:2012:3YHGSRVZT2EV4QA3JUTE7JLJJP

not attested not anchored not stored refs pending

Solving weighted and counting variants of connectivity problems parameterized by treewidth deterministically in single exponential time

Hans L. Bodlaender, Jesper Nederlof, Marek Cygan, Stefan Kratsch

arxiv:1211.1505 v1 · 2012-11-07 · cs.DS · cs.CC · cs.DM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3YHGSRVZT2EV4QA3JUTE7JLJJP}

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	2026-05-18T03:41:20.836802Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

de0e6946b99e895e401b4d264fa5694bcbd5b0159729e0e3d2c7ccdbf14948da

Aliases

arxiv: 1211.1505 · arxiv_version: 1211.1505v1 · doi: 10.48550/arxiv.1211.1505 · pith_short_12: 3YHGSRVZT2EV · pith_short_16: 3YHGSRVZT2EV4QA3 · pith_short_8: 3YHGSRVZ

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/3YHGSRVZT2EV4QA3JUTE7JLJJP \
  | 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: de0e6946b99e895e401b4d264fa5694bcbd5b0159729e0e3d2c7ccdbf14948da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a23a7efb7b17fdccbc22ad0ce3b89a4fe407946fe44eaf36f26a3fd508c9f531",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-11-07T10:38:52Z",
    "title_canon_sha256": "8a040e5fc7520a0b56f1cfabe6e08b4cca8cfc709dc4975a304df60dfbff2962"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.1505",
    "kind": "arxiv",
    "version": 1
  }
}