Pith Number

pith:7BPFQS2R

pith:2013:7BPFQS2RZIJFRTZQMIIWA4N3EE

not attested not anchored not stored refs pending

Querying the Guarded Fragment

Georg Gottlob (Oxford University Computing Laboratory), Martin Otto (Technische Universit\"at Darmstadt), Vince B\'ar\'any (University of Warsaw)

arxiv:1309.5822 v4 · 2013-09-23 · cs.LO · 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{7BPFQS2RZIJFRTZQMIIWA4N3EE}

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	2026-05-17T23:51:24.032238Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f85e584b51ca1258cf3062116071bb211bb56a7037d4196dbad1e537a16b4ea0

Aliases

arxiv: 1309.5822 · arxiv_version: 1309.5822v4 · doi: 10.48550/arxiv.1309.5822 · pith_short_12: 7BPFQS2RZIJF · pith_short_16: 7BPFQS2RZIJFRTZQ · pith_short_8: 7BPFQS2R

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/7BPFQS2RZIJFRTZQMIIWA4N3EE \
  | 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: f85e584b51ca1258cf3062116071bb211bb56a7037d4196dbad1e537a16b4ea0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "865d315e06abac9f6d49ba61c571e46fa0f29493ca36a5ffc6d4b88f43bad9f9",
    "cross_cats_sorted": [
      "cs.DB"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2013-09-23T14:39:46Z",
    "title_canon_sha256": "010f3f2644e04b66ee0d2c82f464d01cce21cd1a2e7d66023cff731e79f36708"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.5822",
    "kind": "arxiv",
    "version": 4
  }
}