Pith Number

pith:IHBVHC2E

pith:2010:IHBVHC2EPMVEPECYVKVKPY7PGB

not attested not anchored not stored refs pending

The conjugacy problem in automaton groups is not solvable

Enric Ventura, Zoran Sunic

arxiv:1010.1993 v3 · 2010-10-11 · 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{IHBVHC2EPMVEPECYVKVKPY7PGB}

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	2026-05-18T03:55:56.296358Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41c3538b447b2a479058aaaaa7e3ef306350352a589d5d3ad665198ddbceb334

Aliases

arxiv: 1010.1993 · arxiv_version: 1010.1993v3 · doi: 10.48550/arxiv.1010.1993 · pith_short_12: IHBVHC2EPMVE · pith_short_16: IHBVHC2EPMVEPECY · pith_short_8: IHBVHC2E

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/IHBVHC2EPMVEPECYVKVKPY7PGB \
  | 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: 41c3538b447b2a479058aaaaa7e3ef306350352a589d5d3ad665198ddbceb334

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c49b928b813933ef6853a833e8c9846aecad3436377bcce9adebfeb26d4b6ba5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2010-10-11T04:41:04Z",
    "title_canon_sha256": "99f92e7c023b0089c257dc87072a26e8b2e76fb2af81912ca575b34291bf5159"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1010.1993",
    "kind": "arxiv",
    "version": 3
  }
}