Pith Number

pith:DU3RLLUT

pith:2007:DU3RLLUTMHG7NXDUW4IFFLRK5A

not attested not anchored not stored refs pending

"Pre-conditioning" for feature selection and regression in high-dimensional problems

Debashis Paul, Eric Bair, Robert Tibshirani, Trevor Hastie

arxiv:math/0703858 v1 · 2007-03-28 · math.ST · 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{DU3RLLUTMHG7NXDUW4IFFLRK5A}

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	2026-05-18T03:27:55.121533Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d3715ae9361cdf6dc74b71052ae2ae8141961d258ea06ebc197fe9d902627a7

Aliases

arxiv: math/0703858 · arxiv_version: math/0703858v1 · doi: 10.48550/arxiv.math/0703858 · pith_short_12: DU3RLLUTMHG7 · pith_short_16: DU3RLLUTMHG7NXDU · pith_short_8: DU3RLLUT

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/DU3RLLUTMHG7NXDUW4IFFLRK5A \
  | 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: 1d3715ae9361cdf6dc74b71052ae2ae8141961d258ea06ebc197fe9d902627a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95939565cc3545bdd0f6edc7abaef09fa910944a5997a9151d40cc6b5076ff36",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "",
    "primary_cat": "math.ST",
    "submitted_at": "2007-03-28T22:07:08Z",
    "title_canon_sha256": "beb4a060bf1269eede5044edb822d9da153574222caea71da9d422261882436c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0703858",
    "kind": "arxiv",
    "version": 1
  }
}