Pith Number

pith:PD5VKVEI

pith:2014:PD5VKVEI4WTRQR2TNKY2BX7AKX

not attested not anchored not stored refs pending

On structural completeness vs almost structural completeness problem: A discriminator varieties case study

Diego Vaggione, Michal M. Stronkowski, Miguel Campercholi

arxiv:1407.0175 v2 · 2014-07-01 · 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{PD5VKVEI4WTRQR2TNKY2BX7AKX}

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	2026-05-18T02:44:48.921892Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78fb555488e5a71847536ab1a0dfe055e7ea613521b1c93ae49467a053f01f6c

Aliases

arxiv: 1407.0175 · arxiv_version: 1407.0175v2 · doi: 10.48550/arxiv.1407.0175 · pith_short_12: PD5VKVEI4WTR · pith_short_16: PD5VKVEI4WTRQR2T · pith_short_8: PD5VKVEI

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/PD5VKVEI4WTRQR2TNKY2BX7AKX \
  | 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: 78fb555488e5a71847536ab1a0dfe055e7ea613521b1c93ae49467a053f01f6c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e94257a0a314ba7084de6c622a61c02ae265a307e2f37aa858f93daa66cd85a4",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2014-07-01T10:35:44Z",
    "title_canon_sha256": "5633c2e2b7a49c4731a23f3b1fee2d25743617228bbeca07ca2fb8c6aaba1c11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.0175",
    "kind": "arxiv",
    "version": 2
  }
}