Pith Number

pith:XFEJRDFE

pith:2019:XFEJRDFE4B6ZXO6MLM5H6BH4HZ

not attested not anchored not stored refs pending

Learning Feature Sparse Principal Components

Feiping Nie, Lai Tian, Xuelong Li

arxiv:1904.10155 v2 · 2019-04-23 · cs.LG · 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{XFEJRDFE4B6ZXO6MLM5H6BH4HZ}

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	2026-05-17T23:45:08.950429Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b948988ca4e07d9bbbcc5b3a7f04fc3e5c5d166ae1064626169af234be36829f

Aliases

arxiv: 1904.10155 · arxiv_version: 1904.10155v2 · doi: 10.48550/arxiv.1904.10155 · pith_short_12: XFEJRDFE4B6Z · pith_short_16: XFEJRDFE4B6ZXO6M · pith_short_8: XFEJRDFE

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/XFEJRDFE4B6ZXO6MLM5H6BH4HZ \
  | 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: b948988ca4e07d9bbbcc5b3a7f04fc3e5c5d166ae1064626169af234be36829f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05c142baf094627604396c460bf232620345a3f93490db058f10353ffb557bb6",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-04-23T05:25:02Z",
    "title_canon_sha256": "9c6bc06a91e8e579e7431b83cab23877c0dd5222c9500a972d231dd7840d58ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.10155",
    "kind": "arxiv",
    "version": 2
  }
}