Pith Number

pith:QWUUF4VF

pith:2011:QWUUF4VFT33FI4TLR4T3U5UCWL

not attested not anchored not stored refs pending

IDL-Expressions: A Formalism for Representing and Parsing Finite Languages in Natural Language Processing

G. Satta, M. J. Nederhof

arxiv:1107.0026 v1 · 2011-06-30 · 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{QWUUF4VFT33FI4TLR4T3U5UCWL}

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	2026-05-18T04:19:02.956163Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85a942f2a59ef654726b8f27ba7682b2faab434e8dde849c05372acb64d64c3a

Aliases

arxiv: 1107.0026 · arxiv_version: 1107.0026v1 · doi: 10.48550/arxiv.1107.0026 · pith_short_12: QWUUF4VFT33F · pith_short_16: QWUUF4VFT33FI4TL · pith_short_8: QWUUF4VF

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/QWUUF4VFT33FI4TLR4T3U5UCWL \
  | 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: 85a942f2a59ef654726b8f27ba7682b2faab434e8dde849c05372acb64d64c3a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e0321bccf15daa96c393eb2e7a2edb6bdbb6d4a02e794e26d4cf44b93a89575",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2011-06-30T20:33:50Z",
    "title_canon_sha256": "41412567ace664131c7dcc5ac097e979ee34ed78a4adcd29cd7e738ad9ff8973"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.0026",
    "kind": "arxiv",
    "version": 1
  }
}