Pith Number

pith:5NQTSYTW

pith:2011:5NQTSYTWBCO4P7THVTJLPIM3IM

not attested not anchored not stored refs pending

Syntactic Complexity of Star-Free Languages

Baiyu Li, Janusz Brzozowski

arxiv:1109.3381 v1 · 2011-09-15 · 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{5NQTSYTWBCO4P7THVTJLPIM3IM}

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	2026-05-18T04:12:56.856195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eb61396276089dc7fe67acd2b7a19b432f7c7bc768c2e455b39f4bdecd195d3c

Aliases

arxiv: 1109.3381 · arxiv_version: 1109.3381v1 · doi: 10.48550/arxiv.1109.3381 · pith_short_12: 5NQTSYTWBCO4 · pith_short_16: 5NQTSYTWBCO4P7TH · pith_short_8: 5NQTSYTW

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/5NQTSYTWBCO4P7THVTJLPIM3IM \
  | 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: eb61396276089dc7fe67acd2b7a19b432f7c7bc768c2e455b39f4bdecd195d3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b5048ae9404d1543663908a43d380073558e567c40fed8760df8818cefb093f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2011-09-15T15:26:08Z",
    "title_canon_sha256": "5e9e4831663c360fca442ff001b006913907529b6998fe8e79cbefbd24c4fcea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.3381",
    "kind": "arxiv",
    "version": 1
  }
}