Pith Number

pith:7LO66KDD

pith:2009:7LO66KDDDEM75HSFTD4O7XXCEK

not attested not anchored not stored refs pending

A Self-Contained and Easily Accessible Discussion of the Method of Descente Infinie and Fermat's Only Explicitly Known Proof by Descente Infinie

Claus-Peter Wirth

arxiv:0902.3623 v4 · 2009-02-20 · cs.AI · cs.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{7LO66KDDDEM75HSFTD4O7XXCEK}

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	2026-05-18T04:33:27.391706Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

faddef28631919fe9e4598f8efdee22289dfac67e46a72bc8efb63bf6ba764fc

Aliases

arxiv: 0902.3623 · arxiv_version: 0902.3623v4 · doi: 10.48550/arxiv.0902.3623 · pith_short_12: 7LO66KDDDEM7 · pith_short_16: 7LO66KDDDEM75HSF · pith_short_8: 7LO66KDD

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/7LO66KDDDEM75HSFTD4O7XXCEK \
  | 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: faddef28631919fe9e4598f8efdee22289dfac67e46a72bc8efb63bf6ba764fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9e0a8c440f91680003173bc1fb4d0e90ef894991ab22628206581cb21ae8013",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2009-02-20T17:16:52Z",
    "title_canon_sha256": "106a44870756d58c84ce7a46a2ad10b35900a7351a1c3feff6a3c68ff66659e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.3623",
    "kind": "arxiv",
    "version": 4
  }
}