Pith Number

pith:T2ZUC46L

pith:2014:T2ZUC46LPCQBC5LLWAXWEVJQAA

not attested not anchored not stored refs pending

Undecidability of satisfiability in the algebra of finite binary relations with union, composition, and difference

Jan Van den Bussche, Tony Tan, Xiaowang Zhang

arxiv:1406.0349 v1 · 2014-06-02 · 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{T2ZUC46LPCQBC5LLWAXWEVJQAA}

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	2026-05-18T02:50:41.141275Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9eb34173cb78a011756bb02f625530001b568ab781a14a63ae014cf3120d398f

Aliases

arxiv: 1406.0349 · arxiv_version: 1406.0349v1 · doi: 10.48550/arxiv.1406.0349 · pith_short_12: T2ZUC46LPCQB · pith_short_16: T2ZUC46LPCQBC5LL · pith_short_8: T2ZUC46L

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/T2ZUC46LPCQBC5LLWAXWEVJQAA \
  | 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: 9eb34173cb78a011756bb02f625530001b568ab781a14a63ae014cf3120d398f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c0cf6bef48cbc90b09c9a7d9a4af321ebaad4eeacd657cc2984ed3ef7ddbe91",
    "cross_cats_sorted": [
      "cs.DB"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2014-06-02T13:02:39Z",
    "title_canon_sha256": "2e60cb81a8bdd688b7a1436d522660fa26c3684e7d5034d431c7b960718bd668"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.0349",
    "kind": "arxiv",
    "version": 1
  }
}