Pith Number

pith:4VHQ6STX

pith:2012:4VHQ6STXM3ALQOBVW3LQZL4T4I

not attested not anchored not stored refs pending

Learning Efficient Structured Sparse Models

Alex Bronstein (Tel Aviv University), Guillermo Sapiro (University of Minnesota), Pablo Sprechmann (University of Minnesota)

arxiv:1206.4649 v1 · 2012-06-18 · cs.LG · cs.CV · 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{4VHQ6STXM3ALQOBVW3LQZL4T4I}

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	2026-05-18T03:53:04.315973Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e54f0f4a7766c0b83835b6d70caf93e2306b6938a3a35983cec3fb6440168957

Aliases

arxiv: 1206.4649 · arxiv_version: 1206.4649v1 · doi: 10.48550/arxiv.1206.4649 · pith_short_12: 4VHQ6STXM3AL · pith_short_16: 4VHQ6STXM3ALQOBV · pith_short_8: 4VHQ6STX

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/4VHQ6STXM3ALQOBVW3LQZL4T4I \
  | 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: e54f0f4a7766c0b83835b6d70caf93e2306b6938a3a35983cec3fb6440168957

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b020a0a028d91a283669b2c6c2710d89fbaee18d0ab184679a49ac605c533a9a",
    "cross_cats_sorted": [
      "cs.CV",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2012-06-18T15:23:19Z",
    "title_canon_sha256": "1596edb850911f014c38061dd21c8c9e3aee0b34d925b291f4495c19771f4357"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.4649",
    "kind": "arxiv",
    "version": 1
  }
}