Pith Number

pith:ET5WFRLQ

pith:2013:ET5WFRLQFHFPK3QXGSKES7AQIY

not attested not anchored not stored refs pending

Detecting Useless Transitions in Pushdown Automata

Brinio Hond, Dick Grune, Peter Rutgers, Wan Fokkink

arxiv:1306.1947 v1 · 2013-06-08 · 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{ET5WFRLQFHFPK3QXGSKES7AQIY}

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	2026-05-18T03:21:22.794187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

24fb62c57029caf56e173494497c1046000239e967425d5f53052dd7ff3fe517

Aliases

arxiv: 1306.1947 · arxiv_version: 1306.1947v1 · doi: 10.48550/arxiv.1306.1947 · pith_short_12: ET5WFRLQFHFP · pith_short_16: ET5WFRLQFHFPK3QX · pith_short_8: ET5WFRLQ

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/ET5WFRLQFHFPK3QXGSKES7AQIY \
  | 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: 24fb62c57029caf56e173494497c1046000239e967425d5f53052dd7ff3fe517

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b97c640e7a664c0d61a80e01dfb91ef92589af566e251ff77142805d6be9d1ef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2013-06-08T19:10:45Z",
    "title_canon_sha256": "43196cb657e08537564f5fab0c02229c2f9df82fe0cc1d2a79fb5a2f674e03e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.1947",
    "kind": "arxiv",
    "version": 1
  }
}