Pith Number

pith:6FMMRPVL

pith:2013:6FMMRPVLPJRI5N6HLYYL6QLBZZ

not attested not anchored not stored refs pending

Distinguishing Models by Formulas and the Number of Countable Models

Mohammad Assem

arxiv:1301.0994 v2 · 2013-01-06 · 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{6FMMRPVLPJRI5N6HLYYL6QLBZZ}

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	2026-05-18T01:00:20.929707Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f158c8beab7a628eb7c75e30bf4161ce5d8466d582bdae3f832f6166c52dd165

Aliases

arxiv: 1301.0994 · arxiv_version: 1301.0994v2 · doi: 10.48550/arxiv.1301.0994 · pith_short_12: 6FMMRPVLPJRI · pith_short_16: 6FMMRPVLPJRI5N6H · pith_short_8: 6FMMRPVL

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/6FMMRPVLPJRI5N6HLYYL6QLBZZ \
  | 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: f158c8beab7a628eb7c75e30bf4161ce5d8466d582bdae3f832f6166c52dd165

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c06ae76b3adaab6c3e5da73ca71c15ca52d651e7cfe5388bbde97a15dd7a8342",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2013-01-06T11:43:21Z",
    "title_canon_sha256": "1ab3c3aa206401987d5fb892647ac2620bad9770e7d91e77d8842829a6e08270"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.0994",
    "kind": "arxiv",
    "version": 2
  }
}