Pith Number

pith:GQXNEPFK

pith:2012:GQXNEPFKY2242WJIZEZVCOQEGA

not attested not anchored not stored refs pending

Alternating Maximization: Unifying Framework for 8 Sparse PCA Formulations and Efficient Parallel Codes

Majid Jahani, Martin Tak\'a\v{c}, Peter Richt\'arik, Selin Damla Ahipa\c{s}ao\u{g}lu

arxiv:1212.4137 v2 · 2012-12-17 · stat.ML · cs.LG · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GQXNEPFKY2242WJIZEZVCOQEGA}

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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	2026-07-05T01:00:58.229436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

342ed23caac6b5cd5928c933513a04303f62c588510f82184de469418327f9d7

Aliases

arxiv: 1212.4137 · arxiv_version: 1212.4137v2 · doi: 10.48550/arxiv.1212.4137 · pith_short_12: GQXNEPFKY224 · pith_short_16: GQXNEPFKY2242WJI · pith_short_8: GQXNEPFK

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/GQXNEPFKY2242WJIZEZVCOQEGA \
  | 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: 342ed23caac6b5cd5928c933513a04303f62c588510f82184de469418327f9d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb63919cc2a5af82ab5f2f6cc733f69aee2b4a8a0ebb066437e1a4aa50382ba1",
    "cross_cats_sorted": [
      "cs.LG",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2012-12-17T20:53:35Z",
    "title_canon_sha256": "158ebfa620b65054ac7fe14d1c225e2a93252dd987fac6fbd0bd97336c397b15"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.4137",
    "kind": "arxiv",
    "version": 2
  }
}