Pith Number

pith:B4CLNFTI

pith:2021:B4CLNFTIDQLQGBDTL7UXFGEPWZ

not attested not anchored not stored refs pending

$\texttt{RidgeSketch}$: A Fast sketching based solver for large scale ridge regression

Mark Ibrahim, Nidham Gazagnadou, Robert M. Gower

arxiv:2105.05565 v2 · 2021-05-12 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B4CLNFTIDQLQGBDTL7UXFGEPWZ}

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	2026-07-05T02:43:34.645349Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f04b696681c170304735fe972988fb674b3adfd998214e7d3307bdee1275a70

Aliases

arxiv: 2105.05565 · arxiv_version: 2105.05565v2 · doi: 10.48550/arxiv.2105.05565 · pith_short_12: B4CLNFTIDQLQ · pith_short_16: B4CLNFTIDQLQGBDT · pith_short_8: B4CLNFTI

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/B4CLNFTIDQLQGBDTL7UXFGEPWZ \
  | 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: 0f04b696681c170304735fe972988fb674b3adfd998214e7d3307bdee1275a70

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00071164852b92263c3b1703d4226e3ba8f9dd0c137dce00224b206e1796ca54",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2021-05-12T10:38:41Z",
    "title_canon_sha256": "819beafbc74939e6f8b441a28a11a35ceaaffabc58bc65680a198e13a330a4fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.05565",
    "kind": "arxiv",
    "version": 2
  }
}