Pith Number

pith:GLWMNTMF

pith:2012:GLWMNTMFQNAXYYAH467B6TOKNF

not attested not anchored not stored refs pending

A Proximal-Gradient Homotopy Method for the Sparse Least-Squares Problem

Lin Xiao, Tong Zhang

arxiv:1203.3002 v1 · 2012-03-14 · math.OC · cs.IT · math.IT · 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{GLWMNTMFQNAXYYAH467B6TOKNF}

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	2026-05-18T04:00:12.969276Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32ecc6cd8583417c6007e7be1f4dca6953cfcb91cd778866490462e9da5fe93a

Aliases

arxiv: 1203.3002 · arxiv_version: 1203.3002v1 · doi: 10.48550/arxiv.1203.3002 · pith_short_12: GLWMNTMFQNAX · pith_short_16: GLWMNTMFQNAXYYAH · pith_short_8: GLWMNTMF

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/GLWMNTMFQNAXYYAH467B6TOKNF \
  | 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: 32ecc6cd8583417c6007e7be1f4dca6953cfcb91cd778866490462e9da5fe93a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4322ff04716de4598a0c5060101449afea2a6403a0287588af7a0f5b2dca3e69",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-03-14T05:34:38Z",
    "title_canon_sha256": "7f2bd2b3d8de9bd96a4a13cfe4aa134d359c9523d2d1f63a0d250f5efb702b7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.3002",
    "kind": "arxiv",
    "version": 1
  }
}