Pith Number

pith:4V6KC6PA

pith:2019:4V6KC6PAYNRBUM46HKSP4AUXJV

not attested not anchored not stored refs pending

A sparse semismooth Newton based proximal majorization-minimization algorithm for nonconvex square-root-loss regression problems

Chengjing Wang, Defeng Sun, Kim-Chuan Toh, Peipei Tang

arxiv:1903.11460 v3 · 2019-03-27 · math.OC · cs.LG · cs.NA · math.NA · stat.CO · 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{4V6KC6PAYNRBUM46HKSP4AUXJV}

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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	2026-07-05T01:06:07.428757Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e57ca179e0c3621a339e3aa4fe02974d61b883f864bf68ebfaf6ed60817bbb56

Aliases

arxiv: 1903.11460 · arxiv_version: 1903.11460v3 · doi: 10.48550/arxiv.1903.11460 · pith_short_12: 4V6KC6PAYNRB · pith_short_16: 4V6KC6PAYNRBUM46 · pith_short_8: 4V6KC6PA

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/4V6KC6PAYNRBUM46HKSP4AUXJV \
  | 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: e57ca179e0c3621a339e3aa4fe02974d61b883f864bf68ebfaf6ed60817bbb56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d13491276fa93632d3ee706f67c39c67e0e1f4cbde15b169fc1b55c8c65b646",
    "cross_cats_sorted": [
      "cs.LG",
      "cs.NA",
      "math.NA",
      "stat.CO",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-03-27T14:51:35Z",
    "title_canon_sha256": "703436179ed2084c4a260511fac2c423e689ea2d7bdd76afbfeeec4f47c7347e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.11460",
    "kind": "arxiv",
    "version": 3
  }
}