Pith Number

pith:QHEQMXU5

pith:2007:QHEQMXU5WY4VAZTGUFE34TD4ZY

not attested not anchored not stored refs pending

The Order-Theoretic Structure of Free Heyting Algebras

Michael O'Connor

arxiv:math/0702675 v2 · 2007-02-22 · 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{QHEQMXU5WY4VAZTGUFE34TD4ZY}

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	2026-07-04T15:00:32.437069Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81c9065e9db639506666a149be4c7cce36331a0957738477c88a60a2dfadf140

Aliases

arxiv: math/0702675 · arxiv_version: math/0702675v2 · doi: 10.48550/arxiv.math/0702675 · pith_short_12: QHEQMXU5WY4V · pith_short_16: QHEQMXU5WY4VAZTG · pith_short_8: QHEQMXU5

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/QHEQMXU5WY4VAZTGUFE34TD4ZY \
  | 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: 81c9065e9db639506666a149be4c7cce36331a0957738477c88a60a2dfadf140

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd31c339ef8e6f101bc046afdc96fdacf4f5bbf4275bb20990d73b23f3e5dc5e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.LO",
    "submitted_at": "2007-02-22T20:18:10Z",
    "title_canon_sha256": "ecc1ca1ab80e7edce6d39123f9a9202fb62e29f5e00e72c7c28dcb5560a20a78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0702675",
    "kind": "arxiv",
    "version": 2
  }
}