Pith Number

pith:YF4A2Q6Y

pith:2013:YF4A2Q6YUGOHKWNBCERIGWDXJ5

not attested not anchored not stored refs pending

Relaxed Sparse Eigenvalue Conditions for Sparse Estimation via Non-convex Regularized Regression

Changshui Zhang, Zheng Pan

arxiv:1306.3343 v3 · 2013-06-14 · cs.LG · cs.NA · 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{YF4A2Q6YUGOHKWNBCERIGWDXJ5}

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	2026-05-18T02:59:18.473424Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c1780d43d8a19c7559a111228358774f6374e2d934cc076eb47ef1d95b59a705

Aliases

arxiv: 1306.3343 · arxiv_version: 1306.3343v3 · doi: 10.48550/arxiv.1306.3343 · pith_short_12: YF4A2Q6YUGOH · pith_short_16: YF4A2Q6YUGOHKWNB · pith_short_8: YF4A2Q6Y

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/YF4A2Q6YUGOHKWNBCERIGWDXJ5 \
  | 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: c1780d43d8a19c7559a111228358774f6374e2d934cc076eb47ef1d95b59a705

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5657d39c0f8ee004c796fe4f6f3befe7668034119d03acd8b597d4254985b79",
    "cross_cats_sorted": [
      "cs.NA",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-06-14T09:10:00Z",
    "title_canon_sha256": "7c138a6c5dfeb2899d5f76d3a9fdb18144c29d904d019e18d88b64b415adc53f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.3343",
    "kind": "arxiv",
    "version": 3
  }
}