Pith Number

pith:ICZDLQKU

pith:2019:ICZDLQKUCUGKRNALFV7NY5B4WZ

not attested not anchored not stored refs pending

Low-Rank plus Sparse Decomposition of Covariance Matrices using Neural Network Parametrization

Ariel Neufeld, Calypso Herrera, Michel Baes, Pierre Ruyssen

arxiv:1908.00461 v2 · 2019-08-01 · math.OC · cs.NA · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ICZDLQKUCUGKRNALFV7NY5B4WZ}

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	2026-07-05T02:49:08.898454Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

40b235c154150ca8b40b2d7edc743cb67131758a92b6956276f2f295706a8d0b

Aliases

arxiv: 1908.00461 · arxiv_version: 1908.00461v2 · doi: 10.48550/arxiv.1908.00461 · pith_short_12: ICZDLQKUCUGK · pith_short_16: ICZDLQKUCUGKRNAL · pith_short_8: ICZDLQKU

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/ICZDLQKUCUGKRNALFV7NY5B4WZ \
  | 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: 40b235c154150ca8b40b2d7edc743cb67131758a92b6956276f2f295706a8d0b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "652b9e5acebc96a72b760c6cf84890acef0f638a5411782ef0b1fb209ce3a806",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-08-01T15:36:25Z",
    "title_canon_sha256": "0b519cf7915b7a8d2fb819256fc635440236ce8a9faa1ffa5b187e89c058ad62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.00461",
    "kind": "arxiv",
    "version": 2
  }
}