Pith Number

pith:FQ5UL6KE

pith:2008:FQ5UL6KENDRJQO4PQYXVURULEL

not attested not anchored not stored refs pending

Boolean Algebras and Logic

Cheng Hao

arxiv:0809.0538 v3 · 2008-09-03 · 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{FQ5UL6KENDRJQO4PQYXVURULEL}

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	2026-05-18T04:07:06.918169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c3b45f94468e2983b8f862f5a468b22ec366c78c907cfb3fa365f9d271dc9b0

Aliases

arxiv: 0809.0538 · arxiv_version: 0809.0538v3 · doi: 10.48550/arxiv.0809.0538 · pith_short_12: FQ5UL6KENDRJ · pith_short_16: FQ5UL6KENDRJQO4P · pith_short_8: FQ5UL6KE

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/FQ5UL6KENDRJQO4PQYXVURULEL \
  | 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: 2c3b45f94468e2983b8f862f5a468b22ec366c78c907cfb3fa365f9d271dc9b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "83bded255ff846ae1bfa43d54cd497b5b14ee50534a8fb74f8c294e0682fdc79",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2008-09-03T02:08:11Z",
    "title_canon_sha256": "ba2cf106017573a2dadedb0ae037efc7a3b61c6c355780636a01c1730068b1ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.0538",
    "kind": "arxiv",
    "version": 3
  }
}