Pith Number

pith:JSEGX3IT

pith:2013:JSEGX3ITVQ2H3BJ3BU52MF4AQW

not attested not anchored not stored refs pending

Free algebras, amalgamation, and a theorem of Vaught for many valued logics

Tarek Sayed Ahmed

arxiv:1304.1148 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{JSEGX3ITVQ2H3BJ3BU52MF4AQW}

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	2026-05-18T03:29:04.364123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c886bed13ac347d853b0d3ba6178085b03bf38674f7936ee76693eee24f58c3

Aliases

arxiv: 1304.1148 · arxiv_version: 1304.1148v1 · doi: 10.48550/arxiv.1304.1148 · pith_short_12: JSEGX3ITVQ2H · pith_short_16: JSEGX3ITVQ2H3BJ3 · pith_short_8: JSEGX3IT

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/JSEGX3ITVQ2H3BJ3BU52MF4AQW \
  | 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: 4c886bed13ac347d853b0d3ba6178085b03bf38674f7936ee76693eee24f58c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c73956c83a645b5a653129af6278c91317c615d03ec6744e0333b85b252037a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2013-04-03T08:54:25Z",
    "title_canon_sha256": "9c449d4929cfe836b361620d773bbc2cb69b3c2ed25bcfdd1c4bb79cb28d7c11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1148",
    "kind": "arxiv",
    "version": 1
  }
}