Pith Number

pith:DYJ66SS4

pith:1995:DYJ66SS4SZ6I46QP7ZPRZYTVLN

not attested not anchored not stored refs pending

The chameleon groups of Richard J. Thompson: automorphisms and dynamics

Matthew G. Brin

arxiv:math/9507205 v1 · 1995-07-21 · 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{DYJ66SS4SZ6I46QP7ZPRZYTVLN}

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	2026-05-18T03:14:17.975215Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e13ef4a5c967c8e7a0ffe5f1ce2755b46da54feef5e59d5b3c941fd6c2d1753

Aliases

arxiv: math/9507205 · arxiv_version: math/9507205v1 · doi: 10.48550/arxiv.math/9507205 · pith_short_12: DYJ66SS4SZ6I · pith_short_16: DYJ66SS4SZ6I46QP · pith_short_8: DYJ66SS4

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/DYJ66SS4SZ6I46QP7ZPRZYTVLN \
  | 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: 1e13ef4a5c967c8e7a0ffe5f1ce2755b46da54feef5e59d5b3c941fd6c2d1753

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1147e164526e7c9bdfc0792233c9cbd192a49cc25a8512e8f20465529d74ef4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.GR",
    "submitted_at": "1995-07-21T20:05:28Z",
    "title_canon_sha256": "3520305cbe4a39b1d1fb490812eb6b9f8297427421a5b81d479ff1c4661adcfd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9507205",
    "kind": "arxiv",
    "version": 1
  }
}