Pith Number

pith:IUWYGNCQ

pith:1995:IUWYGNCQWX6TQNRT6P5SYXHH4M

not attested not anchored not stored refs pending

Pac-learning Recursive Logic Programs: Negative Results

W. W. Cohen

arxiv:cs/9505105 v1 · 1995-05-01 · 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{IUWYGNCQWX6TQNRT6P5SYXHH4M}

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	2026-05-18T02:37:36.796777Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

452d833450b5fd383633f3fb2c5ce7e3157357a3a1f51a74bb1f11302f96c761

Aliases

arxiv: cs/9505105 · arxiv_version: cs/9505105v1 · doi: 10.48550/arxiv.cs/9505105 · pith_short_12: IUWYGNCQWX6T · pith_short_16: IUWYGNCQWX6TQNRT · pith_short_8: IUWYGNCQ

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/IUWYGNCQWX6TQNRT6P5SYXHH4M \
  | 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: 452d833450b5fd383633f3fb2c5ce7e3157357a3a1f51a74bb1f11302f96c761

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc57b57fac5422ed95b162f231c6f7cc4c7a72ee21d83090ff39e1beac5c646a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.AI",
    "submitted_at": "1995-05-01T00:00:00Z",
    "title_canon_sha256": "0118c6733229aacee98baa0974bcc3ee663c4061ef36e950994b284720775ffa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/9505105",
    "kind": "arxiv",
    "version": 1
  }
}