Pith Number

pith:5R2VTWUX

pith:2019:5R2VTWUXYM6SNLUZQ7XLEKWRJA

not attested not anchored not stored refs pending

Sparse $\ell_1$ and $\ell_2$ Center Classifiers

Giulia Fracastoro, Giuseppe C. Calafiore

arxiv:1911.07320 v2 · 2019-11-17 · 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{5R2VTWUXYM6SNLUZQ7XLEKWRJA}

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	2026-07-05T00:21:38.562791Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec7559da97c33d26ae9987eeb22ad14831bc705ffc1047720b3c388e12726e5b

Aliases

arxiv: 1911.07320 · arxiv_version: 1911.07320v2 · doi: 10.48550/arxiv.1911.07320 · pith_short_12: 5R2VTWUXYM6S · pith_short_16: 5R2VTWUXYM6SNLUZ · pith_short_8: 5R2VTWUX

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/5R2VTWUXYM6SNLUZQ7XLEKWRJA \
  | 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: ec7559da97c33d26ae9987eeb22ad14831bc705ffc1047720b3c388e12726e5b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74be47e072f75b537833cd93393a705bb1e4d43cafc57a1220437b76c8a86889",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-11-17T19:15:59Z",
    "title_canon_sha256": "a7790a7549da6b47ba44dce28e18fa112cd69ace3c1c0df4125b1ff4dc42b68c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.07320",
    "kind": "arxiv",
    "version": 2
  }
}