Pith Number

pith:EL5EKZWE

pith:2021:EL5EKZWEBAMOHNUCXSPJG22XIU

not attested not anchored not stored refs pending

Efficient Sparse Spherical k-Means for Document Clustering

Johannes Knittel, Steffen Koch, Thomas Ertl

arxiv:2108.00895 v1 · 2021-07-30 · cs.LG · cs.AI · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EL5EKZWEBAMOHNUCXSPJG22XIU}

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	2026-07-05T03:02:27.965364Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

22fa4566c40818e3b682bc9e936b574515f7170f1c0f15055595eea3b782e273

Aliases

arxiv: 2108.00895 · arxiv_version: 2108.00895v1 · doi: 10.48550/arxiv.2108.00895 · pith_short_12: EL5EKZWEBAMO · pith_short_16: EL5EKZWEBAMOHNUC · pith_short_8: EL5EKZWE

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/EL5EKZWEBAMOHNUCXSPJG22XIU \
  | 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: 22fa4566c40818e3b682bc9e936b574515f7170f1c0f15055595eea3b782e273

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ea9ddb636c320f5384cc76635cef7015fe5b5e159171bbef9569e52e56b4533",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2021-07-30T12:02:33Z",
    "title_canon_sha256": "27e82a7fe3557cd8a4325c7f09d897dbd991ce8ac5f46072a01dd02720135e92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.00895",
    "kind": "arxiv",
    "version": 1
  }
}