Pith Number

pith:C53Q7K6Q

pith:2016:C53Q7K6QMOP3KEJ3VSCWF5FHYY

not attested not anchored not stored refs pending

A Hybrid Quasi-Newton Projected-Gradient Method with Application to Lasso and Basis-Pursuit Denoise

Ewout van den Berg

arxiv:1611.05483 v1 · 2016-11-16 · 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{C53Q7K6QMOP3KEJ3VSCWF5FHYY}

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	2026-05-18T00:58:03.416699Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17770fabd0639fb5113bac8562f4a7c6291b0309a702b4827037096e34ce4425

Aliases

arxiv: 1611.05483 · arxiv_version: 1611.05483v1 · doi: 10.48550/arxiv.1611.05483 · pith_short_12: C53Q7K6QMOP3 · pith_short_16: C53Q7K6QMOP3KEJ3 · pith_short_8: C53Q7K6Q

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/C53Q7K6QMOP3KEJ3VSCWF5FHYY \
  | 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: 17770fabd0639fb5113bac8562f4a7c6291b0309a702b4827037096e34ce4425

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f347d9e745d43aba2a89210df74e329499e14754a4b8f54c32eac754ae09b619",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-11-16T22:10:16Z",
    "title_canon_sha256": "7549888cfc526616a38427e3c440d120e4bfa1ebc7f0c1e0c605b8e033bf46c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.05483",
    "kind": "arxiv",
    "version": 1
  }
}