Pith Number

pith:SAQ7OB5P

pith:2009:SAQ7OB5PUKUV7XWJZR3WZUGFOX

not attested not anchored not stored refs pending

Coding Guidelines for Prolog

Athens, BUGSENG srl, Dunedin, Georgia, Italy), Jan Wielemaker (Department of Computer Science, Michael A. Covington (Institute for Artificial Intelligence, New Zealand), Richard A. O'Keefe (Department of Computer Science, Roberto Bagnara (Department of Mathematics, Simon Price (Intelligent Systems Laboratory, the Netherlands), The University of Georgia, United Kingdom), University of Bristol, University of Otago, University of Parma, U.S.A.), VU University Amsterdam

arxiv:0911.2899 v3 · 2009-11-15 · cs.PL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SAQ7OB5PUKUV7XWJZR3WZUGFOX}

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	2026-05-18T04:22:01.121554Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9021f707afa2a95fdec9cc776cd0c575fcf20ddc2d0987aba9acb369f1d848db

Aliases

arxiv: 0911.2899 · arxiv_version: 0911.2899v3 · doi: 10.48550/arxiv.0911.2899 · pith_short_12: SAQ7OB5PUKUV · pith_short_16: SAQ7OB5PUKUV7XWJ · pith_short_8: SAQ7OB5P

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/SAQ7OB5PUKUV7XWJZR3WZUGFOX \
  | 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: 9021f707afa2a95fdec9cc776cd0c575fcf20ddc2d0987aba9acb369f1d848db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e16cce3fe5fd50b7a1f090fbcc3ce448ffea171dcbf8810fc9b5595ba153132",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2009-11-15T18:21:41Z",
    "title_canon_sha256": "542879ab07fa4074aebd8eabd517994b2dd4030a1837ddb5e3a4ab1fd35f64ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.2899",
    "kind": "arxiv",
    "version": 3
  }
}