Pith Number

pith:LWN4LWHC

pith:2010:LWN4LWHCXLPEXTB4WDIWQAT62I

not attested not anchored not stored refs pending

Combinatorial Characterization of Formal Languages

Arseny M. Shur

arxiv:1010.5456 v1 · 2010-10-26 · cs.FL · cs.DM · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LWN4LWHCXLPEXTB4WDIWQAT62I}

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	2026-05-18T04:38:38.709442Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5d9bc5d8e2bade4bcc3cb0d168027ed226912416a42dd3855e93fa50c2255859

Aliases

arxiv: 1010.5456 · arxiv_version: 1010.5456v1 · doi: 10.48550/arxiv.1010.5456 · pith_short_12: LWN4LWHCXLPE · pith_short_16: LWN4LWHCXLPEXTB4 · pith_short_8: LWN4LWHC

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/LWN4LWHCXLPEXTB4WDIWQAT62I \
  | 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: 5d9bc5d8e2bade4bcc3cb0d168027ed226912416a42dd3855e93fa50c2255859

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e94d0ca571b635bf5ec17808bfb16d6ec085c8d731fc3bc9f39e66d30e13ac0",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2010-10-26T16:45:52Z",
    "title_canon_sha256": "ecff7c0b3d6c877761945f4b039dd7af242a3a164c28d1f4d94b1cbaaaafa644"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1010.5456",
    "kind": "arxiv",
    "version": 1
  }
}