Pith Number

pith:A6KWCNC5

pith:2015:A6KWCNC5QPDAPP452U356AGVHB

not attested not anchored not stored refs pending

Spectral Clustering by Ellipsoid and Its Connection to Separable Nonnegative Matrix Factorization

Tomohiko Mizutani

arxiv:1503.01531 v1 · 2015-03-05 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A6KWCNC5QPDAPP452U356AGVHB}

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	2026-05-18T02:25:33.449638Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

079561345d83c607bf9dd537df00d538781fcdd234414d060d6e025b0a0e8ddd

Aliases

arxiv: 1503.01531 · arxiv_version: 1503.01531v1 · doi: 10.48550/arxiv.1503.01531 · pith_short_12: A6KWCNC5QPDA · pith_short_16: A6KWCNC5QPDAPP45 · pith_short_8: A6KWCNC5

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/A6KWCNC5QPDAPP452U356AGVHB \
  | 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: 079561345d83c607bf9dd537df00d538781fcdd234414d060d6e025b0a0e8ddd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2333ff90e7e5f3da5d5c28da30d52e283836d7265853f700aa883caeebc348f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2015-03-05T04:07:46Z",
    "title_canon_sha256": "4393e2fc4e1df3a1e83adb467577d85d5594f68324a18e1642dbb490270a4189"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.01531",
    "kind": "arxiv",
    "version": 1
  }
}