Pith Number

pith:H2ADDIJK

pith:2018:H2ADDIJKRXI6KG5RAAUZDNWZIE

not attested not anchored not stored refs pending

Origin-equivalence of two-way word transducers is in PSPACE

Anca Muscholl, Gabriele Puppis, Sougata Bose, Vincent Penelle

arxiv:1807.08053 v3 · 2018-07-20 · 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{H2ADDIJKRXI6KG5RAAUZDNWZIE}

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	2026-05-18T00:04:02.361190Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e8031a12a8dd1e51bb1002991b6d9412b25dcf567e91d6f7016f07ec605842d

Aliases

arxiv: 1807.08053 · arxiv_version: 1807.08053v3 · doi: 10.48550/arxiv.1807.08053 · pith_short_12: H2ADDIJKRXI6 · pith_short_16: H2ADDIJKRXI6KG5R · pith_short_8: H2ADDIJK

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/H2ADDIJKRXI6KG5RAAUZDNWZIE \
  | 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: 3e8031a12a8dd1e51bb1002991b6d9412b25dcf567e91d6f7016f07ec605842d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c8d68f3fd47d18e7c093ed09f7af37da3fb28ddb17b6a3f81628857f81ed6816",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2018-07-20T23:17:28Z",
    "title_canon_sha256": "5491ee9afe5b67b1b5505999d3d46d45f2a3d19276ee35821133459db29958cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.08053",
    "kind": "arxiv",
    "version": 3
  }
}