Pith Number

pith:4UKZPFMV

pith:2011:4UKZPFMVYZ6MKNGVDRQZLVWB4C

not attested not anchored not stored refs pending

Structured sparsity through convex optimization

Francis Bach (LIENS, Guillaume Obozinski (LIENS, INRIA Paris - Rocquencourt), Julien Mairal, Rodolphe Jenatton (LIENS

arxiv:1109.2397 v2 · 2011-09-12 · 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{4UKZPFMVYZ6MKNGVDRQZLVWB4C}

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	2026-05-18T03:57:26.795425Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e515979595c67cc534d51c6195d6c1e08244421e99eebe0ac4a51734b465999f

Aliases

arxiv: 1109.2397 · arxiv_version: 1109.2397v2 · doi: 10.48550/arxiv.1109.2397 · pith_short_12: 4UKZPFMVYZ6M · pith_short_16: 4UKZPFMVYZ6MKNGV · pith_short_8: 4UKZPFMV

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/4UKZPFMVYZ6MKNGVDRQZLVWB4C \
  | 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: e515979595c67cc534d51c6195d6c1e08244421e99eebe0ac4a51734b465999f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7614196e5ebffb42fd4e18600d3d89bfa8b6a6f9c090ebf8557c736eebe5c33c",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2011-09-12T08:23:02Z",
    "title_canon_sha256": "86635505248e15b966123ed7d69d6b75159dd89285d0fbb9ab840f47996335ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.2397",
    "kind": "arxiv",
    "version": 2
  }
}