Pith Number

pith:XQQ7KNCL

pith:2018:XQQ7KNCLUDJK3LMZPIJCWE75OZ

not attested not anchored not stored refs pending

A Lagrangian Dual Based Approach to Sparse Linear Programming

Chen Zhao, Houduo Qi, Naihua Xiu, Weiyue Li, Ziyan Luo

arxiv:1805.11942 v2 · 2018-05-30 · 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{XQQ7KNCLUDJK3LMZPIJCWE75OZ}

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	2026-05-18T00:14:21.164212Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc21f5344ba0d2adad997a122b13fd7664e96b191a1e6a241fae1f0ee8909845

Aliases

arxiv: 1805.11942 · arxiv_version: 1805.11942v2 · doi: 10.48550/arxiv.1805.11942 · pith_short_12: XQQ7KNCLUDJK · pith_short_16: XQQ7KNCLUDJK3LMZ · pith_short_8: XQQ7KNCL

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/XQQ7KNCLUDJK3LMZPIJCWE75OZ \
  | 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: bc21f5344ba0d2adad997a122b13fd7664e96b191a1e6a241fae1f0ee8909845

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e069a2a0ecee17231b317f3ea55cfc17b8e0135362e055f46279dbcc0ae40815",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-05-30T13:34:44Z",
    "title_canon_sha256": "fc3811ede2b68440117aeb1a27078986fa34a4963a5749ee172ca144afe6ca1d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.11942",
    "kind": "arxiv",
    "version": 2
  }
}