Pith Number

pith:CM3WGKPA

pith:2015:CM3WGKPAVO6ZA7XVFPGIW3K4OX

not attested not anchored not stored refs pending

Hierarchical Sparse Modeling: A Choice of Two Group Lasso Formulations

Jacob Bien, Xiaohan Yan

arxiv:1512.01631 v4 · 2015-12-05 · stat.ME · math.ST · stat.CO · stat.ML · 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{CM3WGKPAVO6ZA7XVFPGIW3K4OX}

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	2026-05-18T00:29:11.048372Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13376329e0abbd907ef52bcc8b6d5c75c56c386935f297fadbb82f4067b7d043

Aliases

arxiv: 1512.01631 · arxiv_version: 1512.01631v4 · doi: 10.48550/arxiv.1512.01631 · pith_short_12: CM3WGKPAVO6Z · pith_short_16: CM3WGKPAVO6ZA7XV · pith_short_8: CM3WGKPA

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/CM3WGKPAVO6ZA7XVFPGIW3K4OX \
  | 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: 13376329e0abbd907ef52bcc8b6d5c75c56c386935f297fadbb82f4067b7d043

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "164000601cc15fe44e3b14cb0d69d7bf276ca5b56b13820388029fce41d1be56",
    "cross_cats_sorted": [
      "math.ST",
      "stat.CO",
      "stat.ML",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-12-05T07:00:54Z",
    "title_canon_sha256": "4cecf9bfb6c76578852858087798579d0d03daf4cf6fc2fe371e459be4d100bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.01631",
    "kind": "arxiv",
    "version": 4
  }
}