Pith Number

pith:U74G5JZZ

pith:2008:U74G5JZZNABW5Q364Q2EGKR2YX

not attested not anchored not stored refs pending

A note concerning a tidying procedure and contraction groups in non-metrizable, totally disconnected groups

Helge Glockner

arxiv:0809.1754 v2 · 2008-09-10 · math.GR · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U74G5JZZNABW5Q364Q2EGKR2YX}

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	2026-05-18T04:21:50.881260Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7f86ea73968036ec37ee434432a3ac5cce5801a54d0451d108b823d592603fc

Aliases

arxiv: 0809.1754 · arxiv_version: 0809.1754v2 · doi: 10.48550/arxiv.0809.1754 · pith_short_12: U74G5JZZNABW · pith_short_16: U74G5JZZNABW5Q36 · pith_short_8: U74G5JZZ

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/U74G5JZZNABW5Q364Q2EGKR2YX \
  | 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: a7f86ea73968036ec37ee434432a3ac5cce5801a54d0451d108b823d592603fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65e813d1eecb0edac09128e450cd295b552c70335f969fb6481fd79e4dc7f9f3",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2008-09-10T10:22:33Z",
    "title_canon_sha256": "c5ae3d715d1b118752975d13b2c1340770135b10135fbc283bd2131abf0cf7ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.1754",
    "kind": "arxiv",
    "version": 2
  }
}