Pith Number

pith:P7Q2JVBW

pith:2015:P7Q2JVBWYNWBRAMGLKIDDCPR57

not attested not anchored not stored refs pending

Approximating Sparse PCA from Incomplete Data

Abhisek Kundu, Malik Magdon-Ismail, Petros Drineas

arxiv:1503.03903 v1 · 2015-03-12 · cs.LG · cs.IT · cs.NA · 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{P7Q2JVBWYNWBRAMGLKIDDCPR57}

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	2026-05-18T02:23:57.834805Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fe1a4d436c36c1881865a903189f1effa2d9f09b11cdd90058fee877e44e1ec

Aliases

arxiv: 1503.03903 · arxiv_version: 1503.03903v1 · doi: 10.48550/arxiv.1503.03903 · pith_short_12: P7Q2JVBWYNWB · pith_short_16: P7Q2JVBWYNWBRAMG · pith_short_8: P7Q2JVBW

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/P7Q2JVBWYNWBRAMGLKIDDCPR57 \
  | 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: 7fe1a4d436c36c1881865a903189f1effa2d9f09b11cdd90058fee877e44e1ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a422d30c960f305133fb7fe577843d870345d33034b944cafb08db0a0a24f62",
    "cross_cats_sorted": [
      "cs.IT",
      "cs.NA",
      "math.IT",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-03-12T22:16:55Z",
    "title_canon_sha256": "295b28aa1d105fa9a709b4bd75518776d25fe34f037a9577047ead3b5cb59496"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.03903",
    "kind": "arxiv",
    "version": 1
  }
}