Pith Number

pith:COPWWJEX

pith:2013:COPWWJEXD6ZGAR5J6LK2IVP4BM

not attested not anchored not stored refs pending

High-dimensional Joint Sparsity Random Effects Model for Multi-task Learning

Kai Yu, Krishnakumar Balasubramanian, Tong Zhang

arxiv:1309.6814 v1 · 2013-09-26 · cs.LG · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{COPWWJEXD6ZGAR5J6LK2IVP4BM}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:12:10.413028Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

139f6b24971fb26047a9f2d5a455fc0b068599f5b6369e1cc4174820f0826f4d

Aliases

arxiv: 1309.6814 · arxiv_version: 1309.6814v1 · doi: 10.48550/arxiv.1309.6814 · pith_short_12: COPWWJEXD6ZG · pith_short_16: COPWWJEXD6ZGAR5J · pith_short_8: COPWWJEX

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/COPWWJEXD6ZGAR5J6LK2IVP4BM \
  | 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: 139f6b24971fb26047a9f2d5a455fc0b068599f5b6369e1cc4174820f0826f4d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9088549c26c673ca4befd5975f9a74ee8f4d8465ee7fdf0b6bbcdf4fd9152a9",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-09-26T12:29:19Z",
    "title_canon_sha256": "5182c9ea42af8b77820d5bf9fd239a9817819afe0f4cfa7e734ad1e6aeecf591"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.6814",
    "kind": "arxiv",
    "version": 1
  }
}