Pith Number

pith:O5M5JHFT

pith:2015:O5M5JHFTBWU4SWYHVBAUA6HGIE

not attested not anchored not stored refs pending

A rigidity result for crossed products of actions of Baumslag-Solitar groups

Niels Meesschaert

arxiv:1509.08645 v2 · 2015-09-29 · math.OA · math.DS · 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{O5M5JHFTBWU4SWYHVBAUA6HGIE}

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	2026-05-18T01:28:13.826105Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7759d49cb30da9c95b07a8414078e6410f589522f1a32f5926c6c50687740d84

Aliases

arxiv: 1509.08645 · arxiv_version: 1509.08645v2 · doi: 10.48550/arxiv.1509.08645 · pith_short_12: O5M5JHFTBWU4 · pith_short_16: O5M5JHFTBWU4SWYH · pith_short_8: O5M5JHFT

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/O5M5JHFTBWU4SWYHVBAUA6HGIE \
  | 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: 7759d49cb30da9c95b07a8414078e6410f589522f1a32f5926c6c50687740d84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b0d3b0e6d550ff2ff1a7ff89f01d49354ed212095e60eec9fb3b441f283d9d6",
    "cross_cats_sorted": [
      "math.DS",
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2015-09-29T08:56:01Z",
    "title_canon_sha256": "fc7e3c0e326d234680dee56fb955ef8266e6411c4d9eec4e0cfd7f303fcac7d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.08645",
    "kind": "arxiv",
    "version": 2
  }
}