Pith Number

pith:FTPQJ7DU

pith:2018:FTPQJ7DUR3CHPM3FEOABZT2QXA

not attested not anchored not stored refs pending

Checking Admissibility Using Natural Dualities

Benjamin Freisberg, George Metcalfe, Hilary A. Priestley, Leonardo M. Cabrer

arxiv:1801.02046 v2 · 2018-01-06 · 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{FTPQJ7DUR3CHPM3FEOABZT2QXA}

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	2026-05-17T23:58:25.145752Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2cdf04fc748ec477b36523801ccf50b81fe01b86e991256d23542161517fac1e

Aliases

arxiv: 1801.02046 · arxiv_version: 1801.02046v2 · doi: 10.48550/arxiv.1801.02046 · pith_short_12: FTPQJ7DUR3CH · pith_short_16: FTPQJ7DUR3CHPM3F · pith_short_8: FTPQJ7DU

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/FTPQJ7DUR3CHPM3FEOABZT2QXA \
  | 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: 2cdf04fc748ec477b36523801ccf50b81fe01b86e991256d23542161517fac1e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d60afedde9395601e84fafcbef8c102899f0df0da8c40c673e1ce9faeedf0ad5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-01-06T16:25:33Z",
    "title_canon_sha256": "1d8066a500317720da2142d0eb867aebdad59244e102e45d4ee4a67baf7896a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.02046",
    "kind": "arxiv",
    "version": 2
  }
}