Pith Number

pith:UELZ4PWA

pith:2019:UELZ4PWAXB4DIPGVPF6SBL36OL

not attested not anchored not stored refs pending

Two-way Parikh Automata

Emmanuel Filiot, Nicolas Mazzocchi, Shibashis Guha

arxiv:1907.09362 v1 · 2019-07-22 · 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{UELZ4PWAXB4DIPGVPF6SBL36OL}

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	2026-05-17T23:39:59.398943Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1179e3ec0b878343cd5797d20af7e72d21fd35a7480154c661358a88970a64a

Aliases

arxiv: 1907.09362 · arxiv_version: 1907.09362v1 · doi: 10.48550/arxiv.1907.09362 · pith_short_12: UELZ4PWAXB4D · pith_short_16: UELZ4PWAXB4DIPGV · pith_short_8: UELZ4PWA

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/UELZ4PWAXB4DIPGVPF6SBL36OL \
  | 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: a1179e3ec0b878343cd5797d20af7e72d21fd35a7480154c661358a88970a64a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9aaa4b42261c991e3aabf7515bc20a61c4000aa6d2ba5cfcd494000878ba9a4c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2019-07-22T15:03:33Z",
    "title_canon_sha256": "956322d0f8784c9ba006cb11194880cb67bd4a3339cb3eb6d43dd57a5f2ebfb2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.09362",
    "kind": "arxiv",
    "version": 1
  }
}