Pith Number

pith:R3BZ2EMW

pith:2015:R3BZ2EMWQ5NKZMPIVOM75PZP4J

not attested not anchored not stored refs pending

A Solution to Yamakami's Problem on Advised Context-free Languages

Toshio Suzuki

arxiv:1502.00367 v1 · 2015-02-02 · 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{R3BZ2EMWQ5NKZMPIVOM75PZP4J}

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	2026-05-18T02:28:06.148336Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8ec39d1196875aacb1e8ab99febf2fe249bf7b9e06c725fd814d46c1a886d2c2

Aliases

arxiv: 1502.00367 · arxiv_version: 1502.00367v1 · doi: 10.48550/arxiv.1502.00367 · pith_short_12: R3BZ2EMWQ5NK · pith_short_16: R3BZ2EMWQ5NKZMPI · pith_short_8: R3BZ2EMW

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/R3BZ2EMWQ5NKZMPIVOM75PZP4J \
  | 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: 8ec39d1196875aacb1e8ab99febf2fe249bf7b9e06c725fd814d46c1a886d2c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d0a2cba53aef55eb4f6eed4b14a1aadaa3dedcf8e66d739b5f01efc85c7629a9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2015-02-02T05:53:51Z",
    "title_canon_sha256": "eb4e43daf10e770779380065cc49429074a46a20527fd807a3c5adc3959c4599"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.00367",
    "kind": "arxiv",
    "version": 1
  }
}