Pith Number

pith:NF4U57PQ

pith:2013:NF4U57PQVUBLHUIT77TWJ2QLC4

not attested not anchored not stored refs pending

A novel sparsity and clustering regularization

M\'ario A. T. Figueiredo, Xiangrong Zeng

arxiv:1310.4945 v2 · 2013-10-18 · cs.LG · cs.CV · 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{NF4U57PQVUBLHUIT77TWJ2QLC4}

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	2026-05-18T02:58:32.324105Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69794efdf0ad02b3d113ffe764ea0b1722ea6a70f75c26acff406d237f954f46

Aliases

arxiv: 1310.4945 · arxiv_version: 1310.4945v2 · doi: 10.48550/arxiv.1310.4945 · pith_short_12: NF4U57PQVUBL · pith_short_16: NF4U57PQVUBLHUIT · pith_short_8: NF4U57PQ

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/NF4U57PQVUBLHUIT77TWJ2QLC4 \
  | 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: 69794efdf0ad02b3d113ffe764ea0b1722ea6a70f75c26acff406d237f954f46

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c553298d452d39fa513676cacc3c0908de35af3050fb3fdc99384719c1c48ebb",
    "cross_cats_sorted": [
      "cs.CV",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-10-18T08:31:54Z",
    "title_canon_sha256": "39c90f9cc377c1747d388f44b2bab633f2a6cdedb7de5ac5830ced5dc76b79e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.4945",
    "kind": "arxiv",
    "version": 2
  }
}