Pith Number

pith:TRWQVVHB

pith:2018:TRWQVVHBYTUNQU2M34ZSGAO7B5

not attested not anchored not stored refs pending

A New Perspective on FO Model Checking of Dense Graph Classes

Daniel Lokshtanov, Jakub Gajarsk\'y, Jan Obdr\v{z}\'alek, M.S. Ramanujan, Petr Hlin\v{e}n\'y

arxiv:1805.01823 v1 · 2018-05-04 · cs.LO · cs.DM · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TRWQVVHBYTUNQU2M34ZSGAO7B5}

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	2026-05-18T00:16:46.578905Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c6d0ad4e1c4e8d8534cdf332301df0f739410e84349ab4c5164c50aa450ede8

Aliases

arxiv: 1805.01823 · arxiv_version: 1805.01823v1 · doi: 10.48550/arxiv.1805.01823 · pith_short_12: TRWQVVHBYTUN · pith_short_16: TRWQVVHBYTUNQU2M · pith_short_8: TRWQVVHB

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/TRWQVVHBYTUNQU2M34ZSGAO7B5 \
  | 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: 9c6d0ad4e1c4e8d8534cdf332301df0f739410e84349ab4c5164c50aa450ede8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c42502176ab4e7c44f5c53f4a412bb957ac903150fb3507b4ae715775aca82f9",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2018-05-04T15:29:16Z",
    "title_canon_sha256": "318e4a7dc1399bba2a936e9f23f9eae74c7d1d1dbf0ab7776d65287bd7eb5dde"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.01823",
    "kind": "arxiv",
    "version": 1
  }
}