Pith Number

pith:7JRM7YU7

pith:2011:7JRM7YU7QC5VDZFFO6T6FEAKHA

not attested not anchored not stored refs pending

Recovering the Elliott invariant from the Cuntz semigroup

Francesc Perera, Luis Santiago, Marius Dadarlat, Ramon Antoine

arxiv:1109.5803 v1 · 2011-09-27 · math.OA · 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{7JRM7YU7QC5VDZFFO6T6FEAKHA}

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	2026-05-18T04:12:11.169188Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa62cfe29f80bb51e4a577a7e2900a3827c407e28278562ef982b28770a0c396

Aliases

arxiv: 1109.5803 · arxiv_version: 1109.5803v1 · doi: 10.48550/arxiv.1109.5803 · pith_short_12: 7JRM7YU7QC5V · pith_short_16: 7JRM7YU7QC5VDZFF · pith_short_8: 7JRM7YU7

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/7JRM7YU7QC5VDZFFO6T6FEAKHA \
  | 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: fa62cfe29f80bb51e4a577a7e2900a3827c407e28278562ef982b28770a0c396

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a87b71698cc3d79ea5c828878dedf488e5ca1e99825546305c4da303dbc3dd97",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2011-09-27T08:40:41Z",
    "title_canon_sha256": "d5f29ecb150f294d40396df1a2945b9097aab88f46ebf26ce8f330e0a017bd70"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.5803",
    "kind": "arxiv",
    "version": 1
  }
}