Pith Number

pith:HPWZWUBV

pith:2013:HPWZWUBVLRY25DDFDZTFQXB7M5

not attested not anchored not stored refs pending

Group-Sparse Model Selection: Hardness and Relaxations

Anastasios Kyrillidis, Luca Baldassarre, Nirav Bhan, Siddhartha Satpathi, Volkan Cevher

arxiv:1303.3207 v4 · 2013-03-13 · cs.LG · cs.IT · math.IT · 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{HPWZWUBVLRY25DDFDZTFQXB7M5}

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	2026-05-18T02:25:40.595626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3bed9b50355c71ae8c651e66585c3f6747bcd1e82e3f9eeda26e53181b3765da

Aliases

arxiv: 1303.3207 · arxiv_version: 1303.3207v4 · doi: 10.48550/arxiv.1303.3207 · pith_short_12: HPWZWUBVLRY2 · pith_short_16: HPWZWUBVLRY25DDF · pith_short_8: HPWZWUBV

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/HPWZWUBVLRY25DDFDZTFQXB7M5 \
  | 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: 3bed9b50355c71ae8c651e66585c3f6747bcd1e82e3f9eeda26e53181b3765da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ade0092ab7f0e620bff345ceaed74e2400b557a9a1864d40a47fa29d169bcaf",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-03-13T16:22:03Z",
    "title_canon_sha256": "caa235703d04a09ba523902df6ccf5932cd8f57aaaf0bbde00e2defa91191417"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.3207",
    "kind": "arxiv",
    "version": 4
  }
}