Pith Number

pith:67Q2JKG7

pith:2011:67Q2JKG732NF4YFKPQ5F5N6ZEN

not attested not anchored not stored refs pending

Regular Ideal Languages and Their Boolean Combinations

Alexander Lauser, Franz Jahn, Manfred Kufleitner

arxiv:1102.5013 v3 · 2011-02-24 · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{67Q2JKG732NF4YFKPQ5F5N6ZEN}

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	2026-05-18T02:22:31.194158Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7e1a4a8dfde9a5e60aa7c3a5eb7d9237c562c75e21dfae88559709fd7ea1ece

Aliases

arxiv: 1102.5013 · arxiv_version: 1102.5013v3 · doi: 10.48550/arxiv.1102.5013 · pith_short_12: 67Q2JKG732NF · pith_short_16: 67Q2JKG732NF4YFK · pith_short_8: 67Q2JKG7

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/67Q2JKG732NF4YFKPQ5F5N6ZEN \
  | 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: f7e1a4a8dfde9a5e60aa7c3a5eb7d9237c562c75e21dfae88559709fd7ea1ece

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "462cb27a4e9512b72c475227d9a3d1f71d9138a2f09acbc2342213d519112931",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2011-02-24T15:16:21Z",
    "title_canon_sha256": "16d5962bc5cee2026e3643a3c46dbe3e6939e60cc612c72766a9bb9368cd3d3e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.5013",
    "kind": "arxiv",
    "version": 3
  }
}