Pith Number

pith:4BUVJ3W3

pith:2015:4BUVJ3W3A337SMPEGIY3UDQPI6

not attested not anchored not stored refs pending

Sparse and Robust Linear Regression: An Optimization Algorithm and Its Statistical Properties

Hironori Fujisawa, Shota Katayama

arxiv:1505.05257 v1 · 2015-05-20 · math.ST · stat.ME · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4BUVJ3W3A337SMPEGIY3UDQPI6}

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	2026-05-18T02:03:58.882690Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e06954eedb06f7f931e43231ba0e0f478fe1f2d223e60ff889291f1e2be6b2b7

Aliases

arxiv: 1505.05257 · arxiv_version: 1505.05257v1 · doi: 10.48550/arxiv.1505.05257 · pith_short_12: 4BUVJ3W3A337 · pith_short_16: 4BUVJ3W3A337SMPE · pith_short_8: 4BUVJ3W3

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/4BUVJ3W3A337SMPEGIY3UDQPI6 \
  | 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: e06954eedb06f7f931e43231ba0e0f478fe1f2d223e60ff889291f1e2be6b2b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bfd2c41f2d3ae7fe92e3ac95947188825e195b102dfe4f037cad9f02765e45b1",
    "cross_cats_sorted": [
      "stat.ME",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2015-05-20T06:46:32Z",
    "title_canon_sha256": "e1ef28b3909eb0804fc33fb91c896ac0a7a76c0868cc9a9a786b5deca4266dca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.05257",
    "kind": "arxiv",
    "version": 1
  }
}