Pith Number

pith:JI32UVYN

pith:2017:JI32UVYN4OYXAP5R5BDRDYSEIU

not attested not anchored not stored refs pending

Undecidability of the first order theories of free non-commutative Lie algebras

Alexei Myasnikov, Olga Kharlampovich

arxiv:1704.07853 v2 · 2017-04-25 · math.LO · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JI32UVYN4OYXAP5R5BDRDYSEIU}

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	2026-05-18T00:44:06.731959Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4a37aa570de3b1703fb1e84711e244451a5c772e8c8464c35e04bb6fc58c44b3

Aliases

arxiv: 1704.07853 · arxiv_version: 1704.07853v2 · doi: 10.48550/arxiv.1704.07853 · pith_short_12: JI32UVYN4OYX · pith_short_16: JI32UVYN4OYXAP5R · pith_short_8: JI32UVYN

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/JI32UVYN4OYXAP5R5BDRDYSEIU \
  | 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: 4a37aa570de3b1703fb1e84711e244451a5c772e8c8464c35e04bb6fc58c44b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c26de5e9d06cc15c376cb13b2d231d087c931fdc20da39422f12eec016eb87ba",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2017-04-25T18:21:07Z",
    "title_canon_sha256": "30316f8e594f8b6d59c66b7304d54a3d4f1b5a41368c6f97d623ad89c8e8f433"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.07853",
    "kind": "arxiv",
    "version": 2
  }
}