Pith Number

pith:CW4RIYCT

pith:2013:CW4RIYCTXU7DIHHL5TWYXDLMOL

not attested not anchored not stored refs pending

On some open problems in Algebraic logic

Tarek Sayed Ahmed

arxiv:1304.1149 v1 · 2013-04-03 · math.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{CW4RIYCTXU7DIHHL5TWYXDLMOL}

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	2026-05-18T03:29:04.357337Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

15b9146053bd3e341cebeced8b8d6c72ecd11911d2cde422ae3c3e7c7c02f88e

Aliases

arxiv: 1304.1149 · arxiv_version: 1304.1149v1 · doi: 10.48550/arxiv.1304.1149 · pith_short_12: CW4RIYCTXU7D · pith_short_16: CW4RIYCTXU7DIHHL · pith_short_8: CW4RIYCT

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/CW4RIYCTXU7DIHHL5TWYXDLMOL \
  | 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: 15b9146053bd3e341cebeced8b8d6c72ecd11911d2cde422ae3c3e7c7c02f88e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1eb3ce63db63273000895dad6fc0e6e84c891444a62c620da371f802e52abad6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2013-04-03T14:20:12Z",
    "title_canon_sha256": "07eb94124014b1353399a7aa719144e9de218903662e29baf19395dd50f74002"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1149",
    "kind": "arxiv",
    "version": 1
  }
}