Pith Number

pith:27FUB4ST

pith:2013:27FUB4ST56COGD27A3M5WV3MVL

not attested not anchored not stored refs pending

A Second-Order Method for Strongly Convex L1-Regularization Problems

Jacek Gondzio, Kimon Fountoulakis

arxiv:1306.5386 v6 · 2013-06-23 · 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{27FUB4ST56COGD27A3M5WV3MVL}

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	2026-05-18T02:29:39.274425Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7cb40f253ef84e30f5f06d9db576caaca37bd93f3548ef83af3aebe80647c52

Aliases

arxiv: 1306.5386 · arxiv_version: 1306.5386v6 · doi: 10.48550/arxiv.1306.5386 · pith_short_12: 27FUB4ST56CO · pith_short_16: 27FUB4ST56COGD27 · pith_short_8: 27FUB4ST

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/27FUB4ST56COGD27A3M5WV3MVL \
  | 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: d7cb40f253ef84e30f5f06d9db576caaca37bd93f3548ef83af3aebe80647c52

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b6e99972e455d640a4f5388323c605af650fe681b24f82371513e66e4d05eb92",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2013-06-23T08:10:40Z",
    "title_canon_sha256": "ba552e7d0b09ec777d4ba8a164e0d36f89ab64aa75a287fa6d03371cd24e5780"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.5386",
    "kind": "arxiv",
    "version": 6
  }
}