Pith Number

pith:HTKPALWZ

pith:2014:HTKPALWZENCELNQ22IMBBH4LX3

not attested not anchored not stored refs pending

Permutations of context-free and indexed languages

Laura Ciobanu, Murray Elder, Tara Brough

arxiv:1412.5512 v2 · 2014-12-17 · 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{HTKPALWZENCELNQ22IMBBH4LX3}

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	2026-05-18T02:30:07.631253Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3cd4f02ed9234445b61ad218109f8bbee8efcc1fda310cca54e7414987095bd4

Aliases

arxiv: 1412.5512 · arxiv_version: 1412.5512v2 · doi: 10.48550/arxiv.1412.5512 · pith_short_12: HTKPALWZENCE · pith_short_16: HTKPALWZENCELNQ2 · pith_short_8: HTKPALWZ

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/HTKPALWZENCELNQ22IMBBH4LX3 \
  | 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: 3cd4f02ed9234445b61ad218109f8bbee8efcc1fda310cca54e7414987095bd4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2a76d940223d65a1abc53ee9aebc0ee2e57f81069f101134f6947c381e12dbb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2014-12-17T18:32:05Z",
    "title_canon_sha256": "a24fc0062ad6e5bc78321709a22cccb12e22a493788e4e84d477a23f5e278e7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.5512",
    "kind": "arxiv",
    "version": 2
  }
}