Pith Number

pith:K3H7RA4P

pith:2013:K3H7RA4PUMIRKAVRJJDBV776EE

not attested not anchored not stored refs pending

On Even Linear Indexed Languages with a Reduction to the Learning of Context-Free Languages

Benjamin Caulfield

arxiv:1312.0175 v2 · 2013-12-01 · 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{K3H7RA4PUMIRKAVRJJDBV776EE}

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	2026-05-18T02:44:31.628455Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56cff8838fa3111502b14a461afffe213345166839769858a7f614f6361403da

Aliases

arxiv: 1312.0175 · arxiv_version: 1312.0175v2 · doi: 10.48550/arxiv.1312.0175 · pith_short_12: K3H7RA4PUMIR · pith_short_16: K3H7RA4PUMIRKAVR · pith_short_8: K3H7RA4P

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/K3H7RA4PUMIRKAVRJJDBV776EE \
  | 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: 56cff8838fa3111502b14a461afffe213345166839769858a7f614f6361403da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e457de69ba31d1aad85d755c6ede5e7b293e7b59cd2379e0db39d22566bd7d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2013-12-01T03:16:22Z",
    "title_canon_sha256": "5ee0afb70bd21cf46d67720f8ca0990cb3338423b72aa562f3db872e52478269"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.0175",
    "kind": "arxiv",
    "version": 2
  }
}