Pith Number

pith:IBWWADKT

pith:2010:IBWWADKTORMGXE5WXYOZOJKFZZ

not attested not anchored not stored refs pending

Union Support Recovery in Multi-task Learning

John Lafferty, Larry Wasserman, Mladen Kolar

arxiv:1008.5211 v1 · 2010-08-31 · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IBWWADKTORMGXE5WXYOZOJKFZZ}

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	2026-05-18T04:41:36.366363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

406d600d5374586b93b6be1d972545ce60a160b5adff98bf994c304c685903de

Aliases

arxiv: 1008.5211 · arxiv_version: 1008.5211v1 · doi: 10.48550/arxiv.1008.5211 · pith_short_12: IBWWADKTORMG · pith_short_16: IBWWADKTORMGXE5W · pith_short_8: IBWWADKT

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/IBWWADKTORMGXE5WXYOZOJKFZZ \
  | 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: 406d600d5374586b93b6be1d972545ce60a160b5adff98bf994c304c685903de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04283c1a013295a0657b658fc093c600ba1f0111402dbd22c8e58522c75631ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2010-08-31T03:49:26Z",
    "title_canon_sha256": "462c95f139c8c9867d49d688f5bd5a9ad7ef7af67388fcca3a0379d4dae58def"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.5211",
    "kind": "arxiv",
    "version": 1
  }
}