Pith Number

pith:5WGBBMUV

pith:2013:5WGBBMUV7WHTKBNNNSFZSZAIM5

not attested not anchored not stored refs pending

Combined-Semantics Equivalence Is Decidable for a Practical Class of Conjunctive Queries

Rada Chirkova

arxiv:1308.4027 v2 · 2013-08-19 · cs.DB

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5WGBBMUV7WHTKBNNNSFZSZAIM5}

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	2026-05-18T02:45:14.596462Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ed8c10b295fd8f3505ad6c8b9964086766abdfc8bbc449b54d7a8c3ea7583d99

Aliases

arxiv: 1308.4027 · arxiv_version: 1308.4027v2 · doi: 10.48550/arxiv.1308.4027 · pith_short_12: 5WGBBMUV7WHT · pith_short_16: 5WGBBMUV7WHTKBNN · pith_short_8: 5WGBBMUV

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/5WGBBMUV7WHTKBNNNSFZSZAIM5 \
  | 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: ed8c10b295fd8f3505ad6c8b9964086766abdfc8bbc449b54d7a8c3ea7583d99

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d7515e83fc9462772a89fc108e086682646665651d77d4bf3f79a8b06c76a44",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2013-08-19T14:06:11Z",
    "title_canon_sha256": "8ff50b14e76cc6e898bd85bce426a1460646ef5eb5f91ee272dfc4209e0a9374"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.4027",
    "kind": "arxiv",
    "version": 2
  }
}