Pith Number

pith:GCO7MXTW

pith:2012:GCO7MXTWFKNYTB6CZBSEDTWHXR

not attested not anchored not stored refs pending

Approximation Bounds for Sparse Principal Component Analysis

Alexandre d'Aspremont, Francis Bach, Laurent El Ghaoui

arxiv:1205.0121 v2 · 2012-05-01 · 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{GCO7MXTWFKNYTB6CZBSEDTWHXR}

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	2026-05-18T03:53:19.680305Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

309df65e762a9b8987c2c86441cec7bc661d4eb2598e1758a7313b362998f5e4

Aliases

arxiv: 1205.0121 · arxiv_version: 1205.0121v2 · doi: 10.48550/arxiv.1205.0121 · pith_short_12: GCO7MXTWFKNY · pith_short_16: GCO7MXTWFKNYTB6C · pith_short_8: GCO7MXTW

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/GCO7MXTWFKNYTB6CZBSEDTWHXR \
  | 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: 309df65e762a9b8987c2c86441cec7bc661d4eb2598e1758a7313b362998f5e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "851f22441a9d9fd55b9da819bdcbbefad03c6baaccc3e8ac1ade2c224b859d2f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-05-01T09:08:06Z",
    "title_canon_sha256": "1df990232dc4cdc65e388357a723008340f34aa00c658668a09e9b5dcb3f5306"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.0121",
    "kind": "arxiv",
    "version": 2
  }
}