Pith Number

pith:PKWSGOIS

pith:2012:PKWSGOISCVB5E2P2UA3QGIWEJ7

not attested not anchored not stored refs pending

Group Sparse Priors for Covariance Estimation

Benjamin Marlin, Kevin Murphy, Mark Schmidt

arxiv:1205.2626 v1 · 2012-05-09 · stat.ML · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PKWSGOISCVB5E2P2UA3QGIWEJ7}

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	2026-05-18T03:55:47.822732Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7aad2339121543d269faa0370322c44ff50580466cb1e07ad441f1d3968c74f9

Aliases

arxiv: 1205.2626 · arxiv_version: 1205.2626v1 · doi: 10.48550/arxiv.1205.2626 · pith_short_12: PKWSGOISCVB5 · pith_short_16: PKWSGOISCVB5E2P2 · pith_short_8: PKWSGOIS

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/PKWSGOISCVB5E2P2UA3QGIWEJ7 \
  | 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: 7aad2339121543d269faa0370322c44ff50580466cb1e07ad441f1d3968c74f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dff04c8365cbfaf6de05d94c5c94aedb19c2f4df62d5d5415865b1bc5b75eb6b",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2012-05-09T17:19:05Z",
    "title_canon_sha256": "93ca05ed5b32cad9efc925fb84d42c1b741d8d94e6a15bb048e89e5ca77b5910"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.2626",
    "kind": "arxiv",
    "version": 1
  }
}