Pith Number

pith:PYCDCQOS

pith:2008:PYCDCQOSUZ7MLJ3CDWOTNGMW7Y

not attested not anchored not stored refs pending

A Quasi-Newton Approach to Nonsmooth Convex Optimization Problems in Machine Learning

Jin Yu, Nicol N. Schraudolph, Simon Guenter, S.V.N. Vishwanathan

arxiv:0804.3835 v5 · 2008-04-24 · stat.ML · 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{PYCDCQOSUZ7MLJ3CDWOTNGMW7Y}

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	2026-05-18T04:34:38.245628Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e043141d2a67ec5a7621d9d369996fe1c7e40ad28cab7c730df89669a08fa5d

Aliases

arxiv: 0804.3835 · arxiv_version: 0804.3835v5 · doi: 10.48550/arxiv.0804.3835 · pith_short_12: PYCDCQOSUZ7M · pith_short_16: PYCDCQOSUZ7MLJ3C · pith_short_8: PYCDCQOS

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/PYCDCQOSUZ7MLJ3CDWOTNGMW7Y \
  | 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: 7e043141d2a67ec5a7621d9d369996fe1c7e40ad28cab7c730df89669a08fa5d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55c0e471011def2c3862052b55770e21034679b6f669ca2683dab803be816e69",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2008-04-24T04:38:54Z",
    "title_canon_sha256": "beaaebe2a9348a622e633d8bb7f3007bcc71c210511b7896045d1083313d0742"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.3835",
    "kind": "arxiv",
    "version": 5
  }
}