Pith Number

pith:BO4WZWZH

pith:2015:BO4WZWZH276UAO2QE6B7GK6NGA

not attested not anchored not stored refs pending

The Cerny conjecture and 1-contracting automata

Henk Don

arxiv:1507.06070 v2 · 2015-07-22 · math.CO · 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{BO4WZWZH276UAO2QE6B7GK6NGA}

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	2026-05-18T01:04:05.903384Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0bb96cdb27d7fd403b502783f32bcd302768289570db6c259e85040f061bde61

Aliases

arxiv: 1507.06070 · arxiv_version: 1507.06070v2 · doi: 10.48550/arxiv.1507.06070 · pith_short_12: BO4WZWZH276U · pith_short_16: BO4WZWZH276UAO2Q · pith_short_8: BO4WZWZH

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/BO4WZWZH276UAO2QE6B7GK6NGA \
  | 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: 0bb96cdb27d7fd403b502783f32bcd302768289570db6c259e85040f061bde61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "84a241d211dbbfd58cf16c425471d8a43c55d088c87bc311ee6a379d7f7ea3a2",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-07-22T06:39:14Z",
    "title_canon_sha256": "65f18646833c21024b63dc2a22967c1b7d109fbeb8285e7a3a9da7fd34bd5e7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.06070",
    "kind": "arxiv",
    "version": 2
  }
}