Pith Number

pith:QFXHUMZJ

pith:2015:QFXHUMZJTX3NI7SBOYKJR23MSX

not attested not anchored not stored refs pending

On the Worst-Case Approximability of Sparse PCA

Aviad Rubinstein, Dimitris Papailiopoulos, Siu On Chan

arxiv:1507.05950 v1 · 2015-07-21 · stat.ML · cs.CC · cs.DS · cs.LG

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\usepackage{pith}
\pithnumber{QFXHUMZJTX3NI7SBOYKJR23MSX}

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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.

Cited by

1 paper in Pith

A Randomized Algorithm for Sparse PCA based on the Basic SDP Relaxation

Receipt and verification

First computed	2026-05-18T01:36:32.063708Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

816e7a33299df6d47e41761498eb6c95fc6633f3bbe27dbd2f002906f16030e0

Aliases

arxiv: 1507.05950 · arxiv_version: 1507.05950v1 · doi: 10.48550/arxiv.1507.05950 · pith_short_12: QFXHUMZJTX3N · pith_short_16: QFXHUMZJTX3NI7SB · pith_short_8: QFXHUMZJ

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/QFXHUMZJTX3NI7SBOYKJR23MSX \
  | 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: 816e7a33299df6d47e41761498eb6c95fc6633f3bbe27dbd2f002906f16030e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "acc953ad6d0520243bfe44a9a255e822a3ab692a371a2d99c044ed17706da69c",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DS",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2015-07-21T19:34:32Z",
    "title_canon_sha256": "4129b9c6719a9785d915b164f38dc96a67d8f4fcbfc8e0ff4d604bf9d8de8451"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.05950",
    "kind": "arxiv",
    "version": 1
  }
}