Pith Number

pith:DUDLCJCE

pith:2015:DUDLCJCEZ36ETUKJ5DNBBXY6WC

not attested not anchored not stored refs pending

Towards More Efficient SPSD Matrix Approximation and CUR Matrix Decomposition

Shusen Wang, Tong Zhang, Zhihua Zhang

arxiv:1503.08395 v6 · 2015-03-29 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DUDLCJCEZ36ETUKJ5DNBBXY6WC}

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	2026-05-18T00:55:25.796647Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d06b12444cefc49d149e8da10df1eb08f6e24450e27a63bd903b8a3a9e788e9

Aliases

arxiv: 1503.08395 · arxiv_version: 1503.08395v6 · doi: 10.48550/arxiv.1503.08395 · pith_short_12: DUDLCJCEZ36E · pith_short_16: DUDLCJCEZ36ETUKJ · pith_short_8: DUDLCJCE

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/DUDLCJCEZ36ETUKJ5DNBBXY6WC \
  | 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: 1d06b12444cefc49d149e8da10df1eb08f6e24450e27a63bd903b8a3a9e788e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "96921f9aaf56d3846cbb9bd30df2ca4a77495966b4c2a94ad17c9539ce6a36e4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-03-29T07:25:32Z",
    "title_canon_sha256": "7a3940175a687647db9780dd36d907029dd4cf13d69f3e7ddb0c9b68b7288db9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.08395",
    "kind": "arxiv",
    "version": 6
  }
}