Pith Number

pith:4YGB4B7Z

pith:2016:4YGB4B7ZBMXJODZ3UI6TS7LYHQ

not attested not anchored not stored refs pending

Partial Derivatives for Context-Free Languages: From $\mu$-Regular Expressions to Pushdown Automata

Peter Thiemann

arxiv:1610.06832 v3 · 2016-10-21 · 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{4YGB4B7ZBMXJODZ3UI6TS7LYHQ}

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	2026-05-18T00:53:39.888576Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e60c1e07f90b2e970f3ba23d397d783c0e1b16ae143b679033507d7e0469d445

Aliases

arxiv: 1610.06832 · arxiv_version: 1610.06832v3 · doi: 10.48550/arxiv.1610.06832 · pith_short_12: 4YGB4B7ZBMXJ · pith_short_16: 4YGB4B7ZBMXJODZ3 · pith_short_8: 4YGB4B7Z

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/4YGB4B7ZBMXJODZ3UI6TS7LYHQ \
  | 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: e60c1e07f90b2e970f3ba23d397d783c0e1b16ae143b679033507d7e0469d445

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a57d3a14028aa156c2f7d5fe9f66eca6ea013d2718b7dd3506caa387ee528041",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2016-10-21T15:53:18Z",
    "title_canon_sha256": "391d1504fd0570f54715ac86f803bff9b6996344bf9ab0eacd970f0ee3032207"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1610.06832",
    "kind": "arxiv",
    "version": 3
  }
}