Pith Number

pith:2YL2MJYO

pith:2012:2YL2MJYO5P5BWONFFYDUGLGSWX

not attested not anchored not stored refs pending

Dictionary Subselection Using an Overcomplete Joint Sparsity Model

Laurent Daudet, Mehrdad Yaghoobi, Michael E. Davies

arxiv:1212.2834 v2 · 2012-12-12 · cs.LG · math.OC · 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{2YL2MJYO5P5BWONFFYDUGLGSWX}

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	2026-05-18T03:21:31.274098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d617a6270eebfa1b39a52e07432cd2b5f24fcfcc76a6d0611c7b6a7cc1d6e7cd

Aliases

arxiv: 1212.2834 · arxiv_version: 1212.2834v2 · doi: 10.48550/arxiv.1212.2834 · pith_short_12: 2YL2MJYO5P5B · pith_short_16: 2YL2MJYO5P5BWONF · pith_short_8: 2YL2MJYO

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/2YL2MJYO5P5BWONFFYDUGLGSWX \
  | 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: d617a6270eebfa1b39a52e07432cd2b5f24fcfcc76a6d0611c7b6a7cc1d6e7cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec695dd56d944c8045baf466b38802af45cc21d084e19093f5a96e5f265fd6e0",
    "cross_cats_sorted": [
      "math.OC",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2012-12-12T15:02:20Z",
    "title_canon_sha256": "b8349c536c72aace12ff9f4777840660b0aadcd356c10385bd071e3f30a01c09"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.2834",
    "kind": "arxiv",
    "version": 2
  }
}