Pith Number

pith:KQYYLBNB

pith:2014:KQYYLBNB5SNBSO2UA33KV62E3G

not attested not anchored not stored refs pending

Context-Free Grammars with Storage

Joost Engelfriet

arxiv:1408.0683 v1 · 2014-08-04 · 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{KQYYLBNB5SNBSO2UA33KV62E3G}

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	2026-05-18T02:45:56.509855Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54318585a1ec9a193b5406f6aafb44d98b0727ba8719f57c1320cda47cfaeccb

Aliases

arxiv: 1408.0683 · arxiv_version: 1408.0683v1 · doi: 10.48550/arxiv.1408.0683 · pith_short_12: KQYYLBNB5SNB · pith_short_16: KQYYLBNB5SNBSO2U · pith_short_8: KQYYLBNB

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/KQYYLBNB5SNBSO2UA33KV62E3G \
  | 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: 54318585a1ec9a193b5406f6aafb44d98b0727ba8719f57c1320cda47cfaeccb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "137dcfcf29cdcf571454ca856d0e26055711e4052e2820a5bd84a04ea0653537",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2014-08-04T13:40:45Z",
    "title_canon_sha256": "ebd7eb2153c7298a0a506d9c8d67550586408148fe351da8544c38de34a931a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.0683",
    "kind": "arxiv",
    "version": 1
  }
}