Pith Number

pith:FPCDXH2B

pith:2018:FPCDXH2BR5TG25QMM3UB5HYU43

not attested not anchored not stored refs pending

Efficient sparse semismooth Newton methods for the clustered lasso problem

Defeng Sun, Kim-Chuan Toh, Meixia Lin, Yong-jin Liu

arxiv:1808.07181 v3 · 2018-08-22 · math.OC · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FPCDXH2BR5TG25QMM3UB5HYU43}

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	2026-05-17T23:47:15.961559Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2bc43b9f418f666d760c66e81e9f14e6d49c269984d57ef1d98c2852353893db

Aliases

arxiv: 1808.07181 · arxiv_version: 1808.07181v3 · doi: 10.48550/arxiv.1808.07181 · pith_short_12: FPCDXH2BR5TG · pith_short_16: FPCDXH2BR5TG25QM · pith_short_8: FPCDXH2B

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/FPCDXH2BR5TG25QMM3UB5HYU43 \
  | 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: 2bc43b9f418f666d760c66e81e9f14e6d49c269984d57ef1d98c2852353893db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06bbf5488c3a521aae3d9a0b6597cd5464d0091d73aadd9cb8d974e07bc653fd",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-08-22T01:47:53Z",
    "title_canon_sha256": "f2e1956c0208782ac825b22bcfcd9181c3e2f52f773f2f2bc47df40c0af81443"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.07181",
    "kind": "arxiv",
    "version": 3
  }
}