Pith Number

pith:W5NWLIDW

pith:2019:W5NWLIDWFZ6VYHCDHZEGW3H7TC

not attested not anchored not stored refs pending

Optimal Average-Case Reductions to Sparse PCA: From Weak Assumptions to Strong Hardness

Guy Bresler, Matthew Brennan

arxiv:1902.07380 v1 · 2019-02-20 · cs.CC · cs.LG · math.PR · math.ST · stat.ML · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W5NWLIDWFZ6VYHCDHZEGW3H7TC}

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.

Cited by

1 paper in Pith

Notes on Computational Hardness of Hypothesis Testing: Predictions using the Low-Degree Likelihood Ratio

Receipt and verification

First computed	2026-05-17T23:53:08.123595Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b75b65a0762e7d5c1c433e486b6cff9887efee7839f6ff50c128a20db2fe02b1

Aliases

arxiv: 1902.07380 · arxiv_version: 1902.07380v1 · doi: 10.48550/arxiv.1902.07380 · pith_short_12: W5NWLIDWFZ6V · pith_short_16: W5NWLIDWFZ6VYHCD · pith_short_8: W5NWLIDW

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/W5NWLIDWFZ6VYHCDHZEGW3H7TC \
  | 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: b75b65a0762e7d5c1c433e486b6cff9887efee7839f6ff50c128a20db2fe02b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8cc042eff882cc227432f84ee89aadc02193a218771cf8ceffa82bb93eacd638",
    "cross_cats_sorted": [
      "cs.LG",
      "math.PR",
      "math.ST",
      "stat.ML",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2019-02-20T02:35:39Z",
    "title_canon_sha256": "19ad657fabb24ef5531ac7a7ae412d15d7494859cca6e5c63ba352387afe810e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.07380",
    "kind": "arxiv",
    "version": 1
  }
}