Pith Number

pith:PMQ3MVJA

pith:2013:PMQ3MVJA3NE4YQ5EUPQRVHWFPB

not attested not anchored not stored refs pending

On the finitizability problem in algebraic logic; recent results

Tarek Sayed Ahmed

arxiv:1302.1368 v1 · 2013-02-06 · 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{PMQ3MVJA3NE4YQ5EUPQRVHWFPB}

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	2026-05-18T03:34:24.457097Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b21b65520db49cc43a4a3e11a9ec5786b9e5c56a6bbbdcaad2dc69eb278223a

Aliases

arxiv: 1302.1368 · arxiv_version: 1302.1368v1 · doi: 10.48550/arxiv.1302.1368 · pith_short_12: PMQ3MVJA3NE4 · pith_short_16: PMQ3MVJA3NE4YQ5E · pith_short_8: PMQ3MVJA

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/PMQ3MVJA3NE4YQ5EUPQRVHWFPB \
  | 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: 7b21b65520db49cc43a4a3e11a9ec5786b9e5c56a6bbbdcaad2dc69eb278223a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5bbb6af2fd75a5097b03136a827f7fb87b680b99f5cdabc4cd0223751da4fecb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2013-02-06T13:40:35Z",
    "title_canon_sha256": "78928de89e7ea84673efd03316f1f2670482b180c0d045fd10102320791084ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.1368",
    "kind": "arxiv",
    "version": 1
  }
}