Pith Number

pith:CMO66OML

pith:2007:CMO66OMLU3ESSLGL2MQNZKGYGJ

not attested not anchored not stored refs pending

Automata with Nested Pebbles Capture First-Order Logic with Transitive Closure

Hendrik Jan Hoogeboom, Joost Engelfriet

arxiv:cs/0703079 v2 · 2007-03-15 · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CMO66OMLU3ESSLGL2MQNZKGYGJ}

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	2026-05-18T00:53:03.203362Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

131def398ba6c9292ccbd320dca8d83253f290f4d9aefbd9029af6a67bcef67e

Aliases

arxiv: cs/0703079 · arxiv_version: cs/0703079v2 · doi: 10.48550/arxiv.cs/0703079 · pith_short_12: CMO66OMLU3ES · pith_short_16: CMO66OMLU3ESSLGL · pith_short_8: CMO66OML

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/CMO66OMLU3ESSLGL2MQNZKGYGJ \
  | 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: 131def398ba6c9292ccbd320dca8d83253f290f4d9aefbd9029af6a67bcef67e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d05fd0569110462ea357b0e4dccd5ccb5e74377e42aa5f4c53e8af2833ca0c2a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.LO",
    "submitted_at": "2007-03-15T10:27:05Z",
    "title_canon_sha256": "efa6f0c6f7d94d5015fce0a080c1816675bccef3dbae138b07abc9665e104efe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0703079",
    "kind": "arxiv",
    "version": 2
  }
}