Pith Number

pith:6SFOOBZS

pith:2013:6SFOOBZSCIU6YCB4ROTUQZREKF

not attested not anchored not stored refs pending

Strong classification of extensions of classifiable C*-algebras

Efren Ruiz, Gunnar Restorff, Soren Eilers

arxiv:1301.7695 v1 · 2013-01-31 · math.OA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6SFOOBZSCIU6YCB4ROTUQZREKF}

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	2026-05-18T03:34:48.896074Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f48ae707321229ec083c8ba748662451471f45a70edbcdd038675e1f61aabf37

Aliases

arxiv: 1301.7695 · arxiv_version: 1301.7695v1 · doi: 10.48550/arxiv.1301.7695 · pith_short_12: 6SFOOBZSCIU6 · pith_short_16: 6SFOOBZSCIU6YCB4 · pith_short_8: 6SFOOBZS

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/6SFOOBZSCIU6YCB4ROTUQZREKF \
  | 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: f48ae707321229ec083c8ba748662451471f45a70edbcdd038675e1f61aabf37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c0d2ac2f1633d4cc8404a917c71cd35e86cf0c75feb40d8fc05ec15b8c5c89e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2013-01-31T17:27:49Z",
    "title_canon_sha256": "5ee0509b6f3bb28ae67115cbd4a6b9646732526616321d9fcaa16c6281c3992a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.7695",
    "kind": "arxiv",
    "version": 1
  }
}