Pith Number

pith:D5QWWX3F

pith:2009:D5QWWX3FTDOCQPJ2LYAJV5JMS7

not attested not anchored not stored refs pending

Unsolved problems in ordered and orderable groups

A. M. W. Glass, N. Ya. Medvedev, V. M. Kopytov, V. V. Bludov

arxiv:0906.2621 v1 · 2009-06-15 · 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{D5QWWX3FTDOCQPJ2LYAJV5JMS7}

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.

Cited by

1 paper in Pith

On Some Problems from the Kourovka Notebook

Receipt and verification

First computed	2026-07-04T15:43:50.849691Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f616b5f6598dc283d3a5e009af52c97caf01d4cee8d09bc3b187cb4f214fa00

Aliases

arxiv: 0906.2621 · arxiv_version: 0906.2621v1 · doi: 10.48550/arxiv.0906.2621 · pith_short_12: D5QWWX3FTDOC · pith_short_16: D5QWWX3FTDOCQPJ2 · pith_short_8: D5QWWX3F

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/D5QWWX3FTDOCQPJ2LYAJV5JMS7 \
  | 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: 1f616b5f6598dc283d3a5e009af52c97caf01d4cee8d09bc3b187cb4f214fa00

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e563d65596d59c62fccf181b1a837105951a0bed246e9d722b5cbfc6a5b28696",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2009-06-15T07:29:18Z",
    "title_canon_sha256": "6e65832ffc0d0e6a54a66d22cc78eb15964379c68f1cbe5a7a797d2be1549f93"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.2621",
    "kind": "arxiv",
    "version": 1
  }
}