Pith Number

pith:Q4W5DMPM

pith:2021:Q4W5DMPM6RHM2N4SIJ6OGJ6V4U

not attested not anchored not stored refs pending

A Euclidean Distance Matrix Model for Convex Clustering

Qingna Li, Xiaowen Liu, Zhaowei Wang

arxiv:2105.04947 v4 · 2021-05-11 · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q4W5DMPM6RHM2N4SIJ6OGJ6V4U}

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	2026-07-05T10:08:58.192441Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

872dd1b1ecf44ecd3792427ce327d5e525966a6c464e6b8a6c6ba9539308851f

Aliases

arxiv: 2105.04947 · arxiv_version: 2105.04947v4 · doi: 10.48550/arxiv.2105.04947 · pith_short_12: Q4W5DMPM6RHM · pith_short_16: Q4W5DMPM6RHM2N4S · pith_short_8: Q4W5DMPM

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/Q4W5DMPM6RHM2N4SIJ6OGJ6V4U \
  | 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: 872dd1b1ecf44ecd3792427ce327d5e525966a6c464e6b8a6c6ba9539308851f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "07f3dbb97cd89888bd8f60ad2a80f25155750058aaadf201797bdd80d0cd9763",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2021-05-11T11:36:39Z",
    "title_canon_sha256": "e48579658aca45ce4b4ca74ca2db8ed3c7df6349846a46ee8f766cd0c4f16ca3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.04947",
    "kind": "arxiv",
    "version": 4
  }
}