Pith Number

pith:FOUPM4XY

pith:2026:FOUPM4XYEF7JCP4OVFWGPZRZE2

not attested not anchored not stored refs pending

2-Head 2D Returning Finite Automata

Benedek Nagy (Eszterhazy Karoly Catholic University, D. Gnanaraj Thomas (Madras Christian College), Eger, Germany), Henning Fernau (Universit\"at Trier, Hungary), R. Jennifer Rose (Madras Christian College), Robinson Thamburaj (Madras Christian College)

arxiv:2606.26680 v1 · 2026-06-25 · 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{FOUPM4XYEF7JCP4OVFWGPZRZE2}

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	2026-06-26T01:15:56.675124Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ba8f672f8217e913f8ea96c67e6392684b202c5a00447f6b3a588be8bae2f9f

Aliases

arxiv: 2606.26680 · arxiv_version: 2606.26680v1 · doi: 10.48550/arxiv.2606.26680 · pith_short_12: FOUPM4XYEF7J · pith_short_16: FOUPM4XYEF7JCP4O · pith_short_8: FOUPM4XY

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/FOUPM4XYEF7JCP4OVFWGPZRZE2 \
  | 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: 2ba8f672f8217e913f8ea96c67e6392684b202c5a00447f6b3a588be8bae2f9f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "775cad2454f5a985a466308e76b02dfc1ba81d9aade5ba797a923f6679a4370e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2026-06-25T07:13:34Z",
    "title_canon_sha256": "51a297ee79db1586b66e447be2b1b6cdc9ff60c895a96da45d7be01f72609ee9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.26680",
    "kind": "arxiv",
    "version": 1
  }
}