Pith Number

pith:CEXY6QZ3

pith:2017:CEXY6QZ3UKR7ZHNJMJWNM2PSJA

not attested not anchored not stored refs pending

Complexity of regular bifix-free languages

Marek Szyku{\l}a, Robert Ferens

arxiv:1701.03768 v1 · 2017-01-13 · 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{CEXY6QZ3UKR7ZHNJMJWNM2PSJA}

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	2026-05-18T00:52:53.873819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

112f8f433ba2a3fc9da9626cd669f2482bc2b9258682dfc111a9aa10b00306c5

Aliases

arxiv: 1701.03768 · arxiv_version: 1701.03768v1 · doi: 10.48550/arxiv.1701.03768 · pith_short_12: CEXY6QZ3UKR7 · pith_short_16: CEXY6QZ3UKR7ZHNJ · pith_short_8: CEXY6QZ3

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/CEXY6QZ3UKR7ZHNJMJWNM2PSJA \
  | 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: 112f8f433ba2a3fc9da9626cd669f2482bc2b9258682dfc111a9aa10b00306c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "acb26c37f5d7262181153b320628f709e480af13e1aac66b90443cc56bc9c843",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2017-01-13T18:31:53Z",
    "title_canon_sha256": "c7fe2322346b4888394056f5d5877cdc3f03cdd490ce2cc581d2c47da0090b37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.03768",
    "kind": "arxiv",
    "version": 1
  }
}