Pith Number

pith:T6AD3PKF

pith:2018:T6AD3PKFDI5LSS3HTW7CMHNL6U

not attested not anchored not stored refs pending

De Morgan Semi-Heyting and Heyting Algebras

Hanamantagouda P. Sankappanavar

arxiv:1807.00268 v2 · 2018-07-01 · 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{T6AD3PKFDI5LSS3HTW7CMHNL6U}

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	2026-05-18T00:09:58.500297Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f803dbd451a3ab94b679dbe261dabf53759dbe3ece01473aad52c9a5f31610d

Aliases

arxiv: 1807.00268 · arxiv_version: 1807.00268v2 · doi: 10.48550/arxiv.1807.00268 · pith_short_12: T6AD3PKFDI5L · pith_short_16: T6AD3PKFDI5LSS3H · pith_short_8: T6AD3PKF

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/T6AD3PKFDI5LSS3HTW7CMHNL6U \
  | 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: 9f803dbd451a3ab94b679dbe261dabf53759dbe3ece01473aad52c9a5f31610d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8d85ced4ae33602eab35789af281ecbf4ce0754a69b911a0f3a43dea57bd61a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-07-01T04:23:44Z",
    "title_canon_sha256": "ea857bfdaf33f0ed18bed2f5f6777965dc51df8e164cc9a28e2d60dc759d812e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.00268",
    "kind": "arxiv",
    "version": 2
  }
}