Pith Number

pith:5PYOC67M

pith:2014:5PYOC67M7QHXIJ232OVY5YBWBW

not attested not anchored not stored refs pending

A connected 3-state reversible Mealy automaton cannot generate an infinite Burnside group

Dmytro Savchuk, Ines Klimann, Matthieu Picantin

arxiv:1409.6142 v1 · 2014-09-22 · cs.FL · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5PYOC67M7QHXIJ232OVY5YBWBW}

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	2026-05-18T02:42:13.730797Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ebf0e17becfc0f74275bd3ab8ee0360db44c8d3491b90df2d9c65bcd23e31427

Aliases

arxiv: 1409.6142 · arxiv_version: 1409.6142v1 · doi: 10.48550/arxiv.1409.6142 · pith_short_12: 5PYOC67M7QHX · pith_short_16: 5PYOC67M7QHXIJ23 · pith_short_8: 5PYOC67M

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/5PYOC67M7QHXIJ232OVY5YBWBW \
  | 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: ebf0e17becfc0f74275bd3ab8ee0360db44c8d3491b90df2d9c65bcd23e31427

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b9960a3db81513118899b7fcfd5851a3edc5d3079109af8872c2c3cb1ec4f844",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "cs.FL",
    "submitted_at": "2014-09-22T11:15:35Z",
    "title_canon_sha256": "270d109bfc2332635480b38e627c047a0f21fdd1b1853f3f79202c9490b877f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.6142",
    "kind": "arxiv",
    "version": 1
  }
}