Pith Number

pith:3XRXMO74

pith:2012:3XRXMO7465K6YFCQ3FO5ZTJMBS

not attested not anchored not stored refs pending

Learning Model-Based Sparsity via Projected Gradient Descent

Bhiksha Raj, Petros T. Boufounos, Sohail Bahmani

arxiv:1209.1557 v4 · 2012-09-07 · stat.ML · cs.LG · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3XRXMO7465K6YFCQ3FO5ZTJMBS}

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	2026-05-18T01:18:48.153907Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dde3763bfcf755ec1450d95ddccd2c0cbd11fa0714535460f68fd1a1a593a88b

Aliases

arxiv: 1209.1557 · arxiv_version: 1209.1557v4 · doi: 10.48550/arxiv.1209.1557 · pith_short_12: 3XRXMO7465K6 · pith_short_16: 3XRXMO7465K6YFCQ · pith_short_8: 3XRXMO74

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/3XRXMO7465K6YFCQ3FO5ZTJMBS \
  | 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: dde3763bfcf755ec1450d95ddccd2c0cbd11fa0714535460f68fd1a1a593a88b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "51f748734be8bbb9caec8202b7d13d7c6233cbe3c8ab78e392cc166e978bf79d",
    "cross_cats_sorted": [
      "cs.LG",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2012-09-07T14:46:49Z",
    "title_canon_sha256": "8acd336b81a3d9e7c004e10d4a57edf56dffff864b35b5fed610963dd4a36558"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.1557",
    "kind": "arxiv",
    "version": 4
  }
}