Pith Number

pith:Y5WI4KGQ

pith:2019:Y5WI4KGQV37FH2IVSCLKRL7QHL

not attested not anchored not stored refs pending

Relational parsing: a clean, fast parsing strategy for all context-free languages

Grzegorz Herman

arxiv:1902.06591 v1 · 2019-02-18 · 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{Y5WI4KGQV37FH2IVSCLKRL7QHL}

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	2026-05-17T23:53:45.053042Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c76c8e28d0aefe53e9159096a8aff03aca2f7cdb5b7eae18eefbe0ee9721303f

Aliases

arxiv: 1902.06591 · arxiv_version: 1902.06591v1 · doi: 10.48550/arxiv.1902.06591 · pith_short_12: Y5WI4KGQV37F · pith_short_16: Y5WI4KGQV37FH2IV · pith_short_8: Y5WI4KGQ

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/Y5WI4KGQV37FH2IVSCLKRL7QHL \
  | 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: c76c8e28d0aefe53e9159096a8aff03aca2f7cdb5b7eae18eefbe0ee9721303f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "47c918167181b3f74ea310fd8762b981e0d67b916a50ecb91f97b4b8265d53ac",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2019-02-18T14:40:16Z",
    "title_canon_sha256": "12719ea4ec89c3bbee6485cadd3d22f053ec6f52938fb014482c7ce397f6d648"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06591",
    "kind": "arxiv",
    "version": 1
  }
}