Pith Number

pith:M7SHWDTY

pith:2014:M7SHWDTYZJ2XWXJBZPMPTAEIIX

not attested not anchored not stored refs pending

Distinguishability Operations and Closures on Regular Languages

Cezar C\^ampeanu, Nelma Moreira, Rog\'erio Reis

arxiv:1407.0160 v3 · 2014-07-01 · 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{M7SHWDTYZJ2XWXJBZPMPTAEIIX}

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	2026-05-18T02:31:38.054642Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67e47b0e78ca757b5d21cbd8f9808845e5a648c766877e17a6cf8c0cada8683f

Aliases

arxiv: 1407.0160 · arxiv_version: 1407.0160v3 · doi: 10.48550/arxiv.1407.0160 · pith_short_12: M7SHWDTYZJ2X · pith_short_16: M7SHWDTYZJ2XWXJB · pith_short_8: M7SHWDTY

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/M7SHWDTYZJ2XWXJBZPMPTAEIIX \
  | 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: 67e47b0e78ca757b5d21cbd8f9808845e5a648c766877e17a6cf8c0cada8683f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1775e4df4ed361e99329575b5630c4d3544c8fb4a5668700397d6010b8520b17",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2014-07-01T09:39:33Z",
    "title_canon_sha256": "7ab2e66561a715b3c4227aac39cc387c709195f9eddb259cdadf944ae496cd86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.0160",
    "kind": "arxiv",
    "version": 3
  }
}