Pith Number

pith:WACFOGKW

pith:2018:WACFOGKWDCN2UPLUE453EDXLGT

not attested not anchored not stored refs pending

QBF as an Alternative to Courcelle's Theorem

Michael Lampis, Stefan Mengel, Valia Mitsou

arxiv:1805.08456 v1 · 2018-05-22 · cs.AI · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WACFOGKWDCN2UPLUE453EDXLGT}

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	2026-05-18T00:15:26.403307Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b004571956189baa3d74273bb20eeb34e9a1481003263b394f6ced559c495c1c

Aliases

arxiv: 1805.08456 · arxiv_version: 1805.08456v1 · doi: 10.48550/arxiv.1805.08456 · pith_short_12: WACFOGKWDCN2 · pith_short_16: WACFOGKWDCN2UPLU · pith_short_8: WACFOGKW

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/WACFOGKWDCN2UPLUE453EDXLGT \
  | 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: b004571956189baa3d74273bb20eeb34e9a1481003263b394f6ced559c495c1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29fd953b96eefc116a6cc357616d099ce76202527a6ae321b367bce22ddd8a21",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2018-05-22T08:35:41Z",
    "title_canon_sha256": "1a327c04ab37a662ad283cce09a9cb8cd494e62c0c311aca24f504554c18d724"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.08456",
    "kind": "arxiv",
    "version": 1
  }
}