Pith Number

pith:FTOOFXZ2

pith:2023:FTOOFXZ2I4MK6ZKFAG3CA7ZC3B

not attested not anchored not stored refs pending

Efficient Execution of SPARQL Queries with OPTIONAL and UNION Expressions

Jiaqi Chen, Lei Zou, M. Tamer \"Ozsu, Yue Pang

arxiv:2303.13844 v1 · 2023-03-24 · 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{FTOOFXZ2I4MK6ZKFAG3CA7ZC3B}

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	2026-07-05T05:54:20.698094Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2cdce2df3a4718af654501b6207f22d858abacd9bf167afaacc54918a5c85ea3

Aliases

arxiv: 2303.13844 · arxiv_version: 2303.13844v1 · doi: 10.48550/arxiv.2303.13844 · pith_short_12: FTOOFXZ2I4MK · pith_short_16: FTOOFXZ2I4MK6ZKF · pith_short_8: FTOOFXZ2

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/FTOOFXZ2I4MK6ZKFAG3CA7ZC3B \
  | 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: 2cdce2df3a4718af654501b6207f22d858abacd9bf167afaacc54918a5c85ea3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fb70987534d1299f945c3406ff1345d178e8942e8a9b24c4b0f010abb852f363",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2023-03-24T07:37:11Z",
    "title_canon_sha256": "ef9d6d026921948e6b4f646b3c64dcb7e63d953cedc713f00bc58854669ba280"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2303.13844",
    "kind": "arxiv",
    "version": 1
  }
}