Pith Number

pith:4QTH3HM5

pith:2007:4QTH3HM5YIWA6M5BOWD6V5IP3L

not attested not anchored not stored refs pending

Logic Meets Algebra: the Case of Regular Languages

Denis Therien, Pascal Tesson

arxiv:cs/0701154 v2 · 2007-01-25 · 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{4QTH3HM5YIWA6M5BOWD6V5IP3L}

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	2026-05-18T00:53:03.238238Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4267d9d9dc22c0f33a17587eaf50fdada46adac5269c0ac6d018cb43e7901c4

Aliases

arxiv: cs/0701154 · arxiv_version: cs/0701154v2 · doi: 10.48550/arxiv.cs/0701154 · pith_short_12: 4QTH3HM5YIWA · pith_short_16: 4QTH3HM5YIWA6M5B · pith_short_8: 4QTH3HM5

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/4QTH3HM5YIWA6M5BOWD6V5IP3L \
  | 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: e4267d9d9dc22c0f33a17587eaf50fdada46adac5269c0ac6d018cb43e7901c4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a43939ca6061892aad3cd567b527f5f75102c9d12972058ddce41d34eab6631",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.LO",
    "submitted_at": "2007-01-25T20:46:36Z",
    "title_canon_sha256": "31c0140300ab1e54c8e49cff97992c9cda20a8495ebd75ea41ba32c9e0317b82"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0701154",
    "kind": "arxiv",
    "version": 2
  }
}