Pith Number

pith:6HZ6WHBK

pith:2018:6HZ6WHBKAUCBDXZHFLH4TP6ZHV

not attested not anchored not stored refs pending

An Efficient Semismooth Newton Based Algorithm for Convex Clustering

Defeng Sun, Kim-Chuan Toh, Yancheng Yuan

arxiv:1802.07091 v1 · 2018-02-20 · math.OC · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6HZ6WHBKAUCBDXZHFLH4TP6ZHV}

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	2026-05-18T00:22:53.574724Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f1f3eb1c2a050411df272acfc9bfd93d426607bd6a0b096c38e5fb6ca9b8edcc

Aliases

arxiv: 1802.07091 · arxiv_version: 1802.07091v1 · doi: 10.48550/arxiv.1802.07091 · pith_short_12: 6HZ6WHBKAUCB · pith_short_16: 6HZ6WHBKAUCBDXZH · pith_short_8: 6HZ6WHBK

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/6HZ6WHBKAUCBDXZHFLH4TP6ZHV \
  | 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: f1f3eb1c2a050411df272acfc9bfd93d426607bd6a0b096c38e5fb6ca9b8edcc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8621acad6baa86b14283222719e63e73adc61bd777485505b08c8fb7fa2dc095",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-02-20T12:48:02Z",
    "title_canon_sha256": "becbe6dbc53fe0b4177bf6dc09c85a10dafa60ca3e64f5d9a2e1b87906ea8166"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.07091",
    "kind": "arxiv",
    "version": 1
  }
}