Pith Number

pith:EGQDN5RG

pith:2017:EGQDN5RGMJKYFTEDG47J3GAK73

not attested not anchored not stored refs pending

The Universal Fragment of Presburger Arithmetic with Unary Uninterpreted Predicates is Undecidable

Christoph Weidenbach, Marco Voigt, Matthias Horbach

arxiv:1703.01212 v1 · 2017-03-03 · 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{EGQDN5RGMJKYFTEDG47J3GAK73}

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	2026-05-18T00:49:35.691035Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21a036f626625582cc83373e9d980afecb4942afe0a611f0dc6bbea35d672911

Aliases

arxiv: 1703.01212 · arxiv_version: 1703.01212v1 · doi: 10.48550/arxiv.1703.01212 · pith_short_12: EGQDN5RGMJKY · pith_short_16: EGQDN5RGMJKYFTED · pith_short_8: EGQDN5RG

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/EGQDN5RGMJKYFTEDG47J3GAK73 \
  | 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: 21a036f626625582cc83373e9d980afecb4942afe0a611f0dc6bbea35d672911

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a8a220734f5cc7aa14054289fbfdb65a2ac604d98c896ce53c99b154730c816",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2017-03-03T15:38:39Z",
    "title_canon_sha256": "065c99b280184e3e194721172cc60e91c81cd893d39bfa34d47b96c5a2206d65"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.01212",
    "kind": "arxiv",
    "version": 1
  }
}