Pith Number

pith:MWOPECDP

pith:2011:MWOPECDPM2MEZB2FRURTNVVUEF

not attested not anchored not stored refs pending

A Regularity Measure for Context Free Grammars

M. Praveen

arxiv:1109.5615 v1 · 2011-09-26 · cs.FL · cs.CC · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MWOPECDPM2MEZB2FRURTNVVUEF}

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	2026-05-18T04:12:19.092986Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

659cf2086f66984c87458d2336d6b4215789dd07c4be846452523715704ea7ee

Aliases

arxiv: 1109.5615 · arxiv_version: 1109.5615v1 · doi: 10.48550/arxiv.1109.5615 · pith_short_12: MWOPECDPM2ME · pith_short_16: MWOPECDPM2MEZB2F · pith_short_8: MWOPECDP

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/MWOPECDPM2MEZB2FRURTNVVUEF \
  | 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: 659cf2086f66984c87458d2336d6b4215789dd07c4be846452523715704ea7ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8afdc9fdcb0fe1c0fffce1798a6d0d0bf2bbc133eda72179ec75215e202e9db",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2011-09-26T15:43:45Z",
    "title_canon_sha256": "6ed9ad365a5155cd73dde93a4cee6c4949d87bf6eb2324a34f5992ad7abf66cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.5615",
    "kind": "arxiv",
    "version": 1
  }
}