Pith Number

pith:UBEFJWB5

pith:2012:UBEFJWB5GLPTVOESVGIK3YNO7Q

not attested not anchored not stored refs pending

Sparsity by Worst-Case Penalties

Christophe Ambroise, Julien Chiquet, Yves Grandvalet

arxiv:1210.2077 v2 · 2012-10-07 · stat.ML · stat.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UBEFJWB5GLPTVOESVGIK3YNO7Q}

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	2026-05-18T00:39:58.797215Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a04854d83d32df3ab892a990ade1aefc066c727a333df42875471a161d215949

Aliases

arxiv: 1210.2077 · arxiv_version: 1210.2077v2 · doi: 10.48550/arxiv.1210.2077 · pith_short_12: UBEFJWB5GLPT · pith_short_16: UBEFJWB5GLPTVOES · pith_short_8: UBEFJWB5

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/UBEFJWB5GLPTVOESVGIK3YNO7Q \
  | 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: a04854d83d32df3ab892a990ade1aefc066c727a333df42875471a161d215949

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd576606cd8b5de0896ed884298643281fdeff2fdf60105797ffa279fc35f123",
    "cross_cats_sorted": [
      "stat.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2012-10-07T17:06:45Z",
    "title_canon_sha256": "3d50d21d8e1718a3100edb19cf74ac611e6d7b2f16349b1c159a0306e8e158db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.2077",
    "kind": "arxiv",
    "version": 2
  }
}