Pith Number

pith:WLUVRXNS

pith:2015:WLUVRXNSAIVHKJ6WVJB5U4B4JK

not attested not anchored not stored refs pending

The Hunt for a Red Spider: Conjunctive Query Determinacy Is Undecidable

Jerzy Marcinkowski, Tomasz Gogacz

arxiv:1501.01817 v2 · 2015-01-08 · 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{WLUVRXNSAIVHKJ6WVJB5U4B4JK}

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	2026-05-18T01:25:15.947691Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2e958ddb2022a7527d6aa43da703c4a95480877e1395c6686fbfecc190432ff

Aliases

arxiv: 1501.01817 · arxiv_version: 1501.01817v2 · doi: 10.48550/arxiv.1501.01817 · pith_short_12: WLUVRXNSAIVH · pith_short_16: WLUVRXNSAIVHKJ6W · pith_short_8: WLUVRXNS

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/WLUVRXNSAIVHKJ6WVJB5U4B4JK \
  | 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: b2e958ddb2022a7527d6aa43da703c4a95480877e1395c6686fbfecc190432ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f07723a3d25fcbf4c7dd54defe6480c27bb461205ad16352d9ebad4955cbce70",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2015-01-08T12:28:45Z",
    "title_canon_sha256": "f8c52c409dcb21c57114f3a5d5aa8a9b9776cadbe63f4d4f6f708cf9ad91056e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.01817",
    "kind": "arxiv",
    "version": 2
  }
}