Pith Number

pith:4V6JBGVP

pith:2010:4V6JBGVPS74SGRBJM6LZ76CQ5I

not attested not anchored not stored refs pending

Pumping lemmas for linear and nonlinear context-free languages

Benedek Nagy, G\'eza Horv\'ath

arxiv:1012.0023 v1 · 2010-11-30 · 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{4V6JBGVPS74SGRBJM6LZ76CQ5I}

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	2026-05-18T04:34:19.066341Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e57c909aaf97f923442967979ff850ea38e06292a2e431ef0708c4d05f338c25

Aliases

arxiv: 1012.0023 · arxiv_version: 1012.0023v1 · doi: 10.48550/arxiv.1012.0023 · pith_short_12: 4V6JBGVPS74S · pith_short_16: 4V6JBGVPS74SGRBJ · pith_short_8: 4V6JBGVP

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/4V6JBGVPS74SGRBJM6LZ76CQ5I \
  | 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: e57c909aaf97f923442967979ff850ea38e06292a2e431ef0708c4d05f338c25

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54dcc82dcacfecac166cbb042935e5dca90c2a13fd6f4d0edc608eca32c98c2c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2010-11-30T21:26:58Z",
    "title_canon_sha256": "0b6ec7a41049e45f8d59e926d35cb08e401d23069a9966eeff8089f911553d4e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.0023",
    "kind": "arxiv",
    "version": 1
  }
}