Pith Number

pith:QJQGPGKH

pith:2026:QJQGPGKHZEX3DRTRX5XUULG6VW

not attested not anchored not stored refs pending

The Baumslag-Gersten group and a problem of Olshanskii

Carl-Fredrik Nyberg-Brodda

arxiv:2606.27408 v1 · 2026-06-25 · 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{QJQGPGKHZEX3DRTRX5XUULG6VW}

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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.

Cited by

1 paper in Pith

The Baumslag-Gersten group and a problem of Olshanskii

Receipt and verification

First computed	2026-06-29T00:14:05.028367Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8260679947c92fb1c671bf6f4a2cdeada3d3d06c971039ff8f2e96a093903d11

Aliases

arxiv: 2606.27408 · arxiv_version: 2606.27408v1 · doi: 10.48550/arxiv.2606.27408 · pith_short_12: QJQGPGKHZEX3 · pith_short_16: QJQGPGKHZEX3DRTR · pith_short_8: QJQGPGKH

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/QJQGPGKHZEX3DRTRX5XUULG6VW \
  | 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: 8260679947c92fb1c671bf6f4a2cdeada3d3d06c971039ff8f2e96a093903d11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7b30cd82fe96d06fb954d185c03be784055c7fa518125285fde21de038118e3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2026-06-25T08:54:07Z",
    "title_canon_sha256": "060c9c9ca5e183ba69dbab7c09f1238c2ac183b775e1bad0809308210d83bc15"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.27408",
    "kind": "arxiv",
    "version": 1
  }
}