Pith Number

pith:45IAH7TD

pith:2009:45IAH7TDJF2LC25UTVNMRE7E52

not attested not anchored not stored refs pending

Hilbert's epsilon as an Operator of Indefinite Committed Choice

Claus-Peter Wirth

arxiv:0902.3749 v3 · 2009-02-21 · 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{45IAH7TDJF2LC25UTVNMRE7E52}

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	2026-05-18T03:13:22.189158Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e75003fe634974b16bb49d5ac893e4ee8ff2096419c7cfc00d5285911fac9cc7

Aliases

arxiv: 0902.3749 · arxiv_version: 0902.3749v3 · doi: 10.48550/arxiv.0902.3749 · pith_short_12: 45IAH7TDJF2L · pith_short_16: 45IAH7TDJF2LC25U · pith_short_8: 45IAH7TD

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/45IAH7TDJF2LC25UTVNMRE7E52 \
  | 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: e75003fe634974b16bb49d5ac893e4ee8ff2096419c7cfc00d5285911fac9cc7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "75d7f847e6def0c42971d635247bcd5a428f48cfb53a14385d4a56fbbc4ef604",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2009-02-21T17:04:16Z",
    "title_canon_sha256": "c3eace6ee6cc446a4f333958a9dfe81e2da87a28ce45d53b1272445c116e4852"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.3749",
    "kind": "arxiv",
    "version": 3
  }
}