Pith Number

pith:TAP6TXWN

pith:2026:TAP6TXWNR5ALXETPVPARWX4MPH

not attested not anchored not stored refs pending

Learning Deterministic Finite-State Machines from the Prefixes of a Single String is NP-Complete

Ayumi Shinohara, Radu Cosmin Dumitru, Ryo Yoshinaka

arxiv:2601.12621 v2 · 2026-01-18 · cs.FL · cs.LG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TAP6TXWNR5ALXETPVPARWX4MPH}

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	2026-06-30T02:17:14.747550Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

981fe9decd8f40bb926fabc11b5f8c79db7e3e98db5ce08b4db9cb10fe2caf47

Aliases

arxiv: 2601.12621 · arxiv_version: 2601.12621v2 · doi: 10.48550/arxiv.2601.12621 · pith_short_12: TAP6TXWNR5AL · pith_short_16: TAP6TXWNR5ALXETP · pith_short_8: TAP6TXWN

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/TAP6TXWNR5ALXETPVPARWX4MPH \
  | 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: 981fe9decd8f40bb926fabc11b5f8c79db7e3e98db5ce08b4db9cb10fe2caf47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2db3c2fe17fe6c6f5e80485e64cfa7347d145a121681d178c719aee5a7a8c39",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2026-01-18T23:28:36Z",
    "title_canon_sha256": "ea448b4c03bfc95f44771618968cf2106337daee1fb857aaf0f4ac4c5b1db2ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.12621",
    "kind": "arxiv",
    "version": 2
  }
}