Pith Number

pith:EKD5HU2Z

pith:2015:EKD5HU2ZJYTMVLUYT2TS5BOIFG

not attested not anchored not stored refs pending

Context-Free Language Theory Formalization

Marcus Vin\'icius Midena Ramos, Ruy J. G. B. de Queiroz

arxiv:1505.00061 v1 · 2015-05-01 · cs.FL · cs.LO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EKD5HU2ZJYTMVLUYT2TS5BOIFG}

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	2026-05-18T02:17:13.682287Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2287d3d3594e26caae989ea72e85c82987e45f51b4dd62975cfb6f9314f3b006

Aliases

arxiv: 1505.00061 · arxiv_version: 1505.00061v1 · doi: 10.48550/arxiv.1505.00061 · pith_short_12: EKD5HU2ZJYTM · pith_short_16: EKD5HU2ZJYTMVLUY · pith_short_8: EKD5HU2Z

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/EKD5HU2ZJYTMVLUYT2TS5BOIFG \
  | 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: 2287d3d3594e26caae989ea72e85c82987e45f51b4dd62975cfb6f9314f3b006

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "673ad00193de211b59b7d6702ae10dcb8c1a12c9bde9213885722448760048f8",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2015-05-01T00:27:18Z",
    "title_canon_sha256": "1a6b67b61702e77ff1760e2b6c1c3aa47c43c059748c925d480db2439585f527"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.00061",
    "kind": "arxiv",
    "version": 1
  }
}