Pith Number

pith:FWTDGI36

pith:2015:FWTDGI367XZ4M4LXRJTXIHS454

not attested not anchored not stored refs pending

Formalization of context-free language theory

Jos\'e Carlos Bacelar Almeida, Marcus V. M. Ramos, Nelma Moreira, Ruy J. G. B. de Queiroz

arxiv:1510.09092 v1 · 2015-10-30 · 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{FWTDGI367XZ4M4LXRJTXIHS454}

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	2026-05-18T01:28:23.143922Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2da633237efdf3c671778a67741e5cef3c4d743a8b1ba435057f99532df39d9a

Aliases

arxiv: 1510.09092 · arxiv_version: 1510.09092v1 · doi: 10.48550/arxiv.1510.09092 · pith_short_12: FWTDGI367XZ4 · pith_short_16: FWTDGI367XZ4M4LX · pith_short_8: FWTDGI36

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/FWTDGI367XZ4M4LXRJTXIHS454 \
  | 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: 2da633237efdf3c671778a67741e5cef3c4d743a8b1ba435057f99532df39d9a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "532f06e15bee81b3baef9247440f497ab487ea117452a45c63918be7a6662364",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2015-10-30T13:59:52Z",
    "title_canon_sha256": "65ab01f4f64c8ec33f4f691d7c4b460fee3165ffe9ac53971b06d8e568d6f33d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.09092",
    "kind": "arxiv",
    "version": 1
  }
}