Pith Number

pith:QIG6SM76

pith:2009:QIG6SM76SNJTG26L6NVEM7FZUS

not attested not anchored not stored refs pending

A projection proximal-point algorithm for l^1-minimization

Dirk A. Lorenz

arxiv:0904.1523 v1 · 2009-04-09 · math.NA · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QIG6SM76SNJTG26L6NVEM7FZUS}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T04:38:50.915442Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

820de933fe9353336bcbf36a467cb9a4b92037b9d9c313d633b0e5febdfeef63

Aliases

arxiv: 0904.1523 · arxiv_version: 0904.1523v1 · doi: 10.48550/arxiv.0904.1523 · pith_short_12: QIG6SM76SNJT · pith_short_16: QIG6SM76SNJTG26L · pith_short_8: QIG6SM76

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/QIG6SM76SNJTG26L6NVEM7FZUS \
  | 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: 820de933fe9353336bcbf36a467cb9a4b92037b9d9c313d633b0e5febdfeef63

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22dc64f3a7be742c409d3747b4b51bd6df1b1cc9aa83e4f275637f87c6354e49",
    "cross_cats_sorted": [
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-04-09T12:58:52Z",
    "title_canon_sha256": "cc96abc669823433cb4981f66302e530d0df20f7993d73cd9e94446f049a3514"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1523",
    "kind": "arxiv",
    "version": 1
  }
}