Pith Number

pith:QW4QEWKB

pith:2006:QW4QEWKB2PNIYRMCLYUFU5SJEG

not attested not anchored not stored refs pending

Certainty Closure: Reliable Constraint Reasoning with Incomplete or Erroneous Data

Carmen Gervet, Neil Yorke-Smith

arxiv:cs/0601109 v3 · 2006-01-25 · cs.AI

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QW4QEWKB2PNIYRMCLYUFU5SJEG}

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	2026-05-18T00:08:46.751094Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85b9025941d3da8c45825e285a764921baa2d4b22920d33f14c21118e5f3cd3a

Aliases

arxiv: cs/0601109 · arxiv_version: cs/0601109v3 · doi: 10.48550/arxiv.cs/0601109 · pith_short_12: QW4QEWKB2PNI · pith_short_16: QW4QEWKB2PNIYRMC · pith_short_8: QW4QEWKB

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/QW4QEWKB2PNIYRMCLYUFU5SJEG \
  | 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: 85b9025941d3da8c45825e285a764921baa2d4b22920d33f14c21118e5f3cd3a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c55177db5b4ec08b148657b1413c5f0f3ee4d64994fad85184ec5e0ea3221efd",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.AI",
    "submitted_at": "2006-01-25T20:11:11Z",
    "title_canon_sha256": "8203340a29aa53fd7936fcf7cbce60ad89c8ba8fd95d2e659ddab63cbf4ba818"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0601109",
    "kind": "arxiv",
    "version": 3
  }
}