Pith Number

pith:ZRXTCC2O

pith:2017:ZRXTCC2OR4YHL4KYNR5HIZ2EYN

not attested not anchored not stored refs pending

The tractability frontier of well-designed SPARQL queries

Miguel Romero

arxiv:1712.08809 v3 · 2017-12-23 · cs.DB · cs.DS · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZRXTCC2OR4YHL4KYNR5HIZ2EYN}

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	2026-05-18T00:20:04.999538Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc6f310b4e8f3075f1586c7a746744c344930b7d2dc4f5bc6b151150d4225412

Aliases

arxiv: 1712.08809 · arxiv_version: 1712.08809v3 · doi: 10.48550/arxiv.1712.08809 · pith_short_12: ZRXTCC2OR4YH · pith_short_16: ZRXTCC2OR4YHL4KY · pith_short_8: ZRXTCC2O

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/ZRXTCC2OR4YHL4KYNR5HIZ2EYN \
  | 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: cc6f310b4e8f3075f1586c7a746744c344930b7d2dc4f5bc6b151150d4225412

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "457bc241733401a491dbb95897baed8e7bd0c69b0ce386d1eb2d62ab9507cc64",
    "cross_cats_sorted": [
      "cs.DS",
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2017-12-23T17:23:08Z",
    "title_canon_sha256": "dde6fe219c073ac29b0dc3ff10f85ea411038dc6ebd819a3a0b90b6b6c670650"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.08809",
    "kind": "arxiv",
    "version": 3
  }
}