Pith Number

pith:QXFTEVFI

pith:2026:QXFTEVFIWHH6GMC6TOIC7E3GHP

not attested not anchored not stored refs pending

The Effective Number of Nonzeros: Theory and Regularization for Sparse Recovery

Hao Wang, Haoyu He, Jiashan Wang, Qiankun Shi

arxiv:2603.13826 v2 · 2026-03-14 · cs.LG · 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{QXFTEVFIWHH6GMC6TOIC7E3GHP}

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	2026-06-25T01:17:51.785047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85cb3254a8b1cfe3305e9b902f93663bdb106bea893efaa5121cc33da91af2ca

Aliases

arxiv: 2603.13826 · arxiv_version: 2603.13826v2 · doi: 10.48550/arxiv.2603.13826 · pith_short_12: QXFTEVFIWHH6 · pith_short_16: QXFTEVFIWHH6GMC6 · pith_short_8: QXFTEVFI

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/QXFTEVFIWHH6GMC6TOIC7E3GHP \
  | 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: 85cb3254a8b1cfe3305e9b902f93663bdb106bea893efaa5121cc33da91af2ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e5d324393145259691648bb283abf522f161fe597c66dcc3f2c7eaaaba0bdb2a",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-03-14T08:20:29Z",
    "title_canon_sha256": "4eebf747238cf1fe375f78e7e78118a1c2802b8a66512ee5fcfffad6ebe329ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.13826",
    "kind": "arxiv",
    "version": 2
  }
}