Pith Number

pith:RXNER2LN

pith:2015:RXNER2LN34UKPWUB52XLLS3RVW

not attested not anchored not stored refs pending

Finite relation algebras and omitting types in modal fragments of first order logic

Tarek Sayed Ahmed

arxiv:1504.05947 v1 · 2015-04-22 · 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{RXNER2LN34UKPWUB52XLLS3RVW}

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	2026-05-18T02:18:03.154998Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8dda48e96ddf28a7da81eeaeb5cb71adbbf5dc15efebb987430ced58e362ebb2

Aliases

arxiv: 1504.05947 · arxiv_version: 1504.05947v1 · doi: 10.48550/arxiv.1504.05947 · pith_short_12: RXNER2LN34UK · pith_short_16: RXNER2LN34UKPWUB · pith_short_8: RXNER2LN

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/RXNER2LN34UKPWUB52XLLS3RVW \
  | 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: 8dda48e96ddf28a7da81eeaeb5cb71adbbf5dc15efebb987430ced58e362ebb2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "adee017d24dd948455aa573cf837ac96ff43a21620964aa3cec922c4db159f42",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-04-22T14:33:16Z",
    "title_canon_sha256": "9150446e07572ae9bfebfa7c1b4ccc6c3c88f93708192a3187995dc4049d4833"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.05947",
    "kind": "arxiv",
    "version": 1
  }
}