Pith Number

pith:2D3DG4X5

pith:2018:2D3DG4X57SKA6LAOFNPSOV5QGR

not attested not anchored not stored refs pending

Regularized Greedy Column Subset Selection

Alberto Mozo, Bruno Ordozgoiti, Jes\'us Garc\'ia L\'opez de Lacalle

arxiv:1804.04421 v1 · 2018-04-12 · cs.LG · cs.AI · 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{2D3DG4X57SKA6LAOFNPSOV5QGR}

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	2026-05-18T00:18:37.613436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0f63372fdfc940f2c0e2b5f2757b03468d0f97b50fb196c15398b93d53b8599

Aliases

arxiv: 1804.04421 · arxiv_version: 1804.04421v1 · doi: 10.48550/arxiv.1804.04421 · pith_short_12: 2D3DG4X57SKA · pith_short_16: 2D3DG4X57SKA6LAO · pith_short_8: 2D3DG4X5

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/2D3DG4X57SKA6LAOFNPSOV5QGR \
  | 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: d0f63372fdfc940f2c0e2b5f2757b03468d0f97b50fb196c15398b93d53b8599

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "599bbd39f8bcad4fe33987593c0697fa4ac5daeb24c2b776d59849843eddaa4a",
    "cross_cats_sorted": [
      "cs.AI",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2018-04-12T10:56:44Z",
    "title_canon_sha256": "3693851248cd5be0779983ea54f99e7d9648d201f0558726a5883139bcb2fff5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.04421",
    "kind": "arxiv",
    "version": 1
  }
}