Pith Number

pith:XJX4F6NV

pith:2013:XJX4F6NV5HW45MDQ2MJT3C7FK6

not attested not anchored not stored refs pending

A Study of Error Variance Estimation in Lasso Regression

Jerome Friedman, Robert Tibshirani, Stephen Reid

arxiv:1311.5274 v2 · 2013-11-21 · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XJX4F6NV5HW45MDQ2MJT3C7FK6}

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	2026-05-18T03:00:49.053158Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba6fc2f9b5e9edceb070d3133d8be5578907935097b8f42e4530a1723f489cc1

Aliases

arxiv: 1311.5274 · arxiv_version: 1311.5274v2 · doi: 10.48550/arxiv.1311.5274 · pith_short_12: XJX4F6NV5HW4 · pith_short_16: XJX4F6NV5HW45MDQ · pith_short_8: XJX4F6NV

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/XJX4F6NV5HW45MDQ2MJT3C7FK6 \
  | 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: ba6fc2f9b5e9edceb070d3133d8be5578907935097b8f42e4530a1723f489cc1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "825475e43a32cb0d78d222a689634ad2e95c618e2b715e14a6682740849af3eb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2013-11-21T00:09:14Z",
    "title_canon_sha256": "66a5568fbdf6e163bd714a8667bd7234dd3c65476ac54cb1370193de07f2feaa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.5274",
    "kind": "arxiv",
    "version": 2
  }
}