Pith Number

pith:HWUV2DR2

pith:2004:HWUV2DR27JE36F7WIQNHGYP66L

not attested not anchored not stored refs pending

Finite group extensions and the Atiyah conjecture

Peter Linnell, Thomas Schick

arxiv:math/0403229 v5 · 2004-03-15 · math.GR · 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{HWUV2DR27JE36F7WIQNHGYP66L}

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	2026-05-17T23:59:44.886394Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3da95d0e3afa49bf17f6441a7361fef2f88ea11902fadb7a818f206814120dc9

Aliases

arxiv: math/0403229 · arxiv_version: math/0403229v5 · doi: 10.48550/arxiv.math/0403229 · pith_short_12: HWUV2DR27JE3 · pith_short_16: HWUV2DR27JE36F7W · pith_short_8: HWUV2DR2

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/HWUV2DR27JE36F7WIQNHGYP66L \
  | 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: 3da95d0e3afa49bf17f6441a7361fef2f88ea11902fadb7a818f206814120dc9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b1e0fd1d5930624c6c29970173b7a163e8697c69bc238ef393103d9766bfea7",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "",
    "primary_cat": "math.GR",
    "submitted_at": "2004-03-15T20:22:44Z",
    "title_canon_sha256": "31b335da1c86c8af87ff921fb02acb7ba802fc2bedfad8558178263b4d446a65"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0403229",
    "kind": "arxiv",
    "version": 5
  }
}