Pith Number

pith:XGG4U3EH

pith:2019:XGG4U3EHWSS7VNNYW36QYAZMMN

not attested not anchored not stored refs pending

Lower Bound Convex Programs for Exact Sparse Optimization

Jean-Philippe Chancelier (CERMICS), Michel de Lara (CERMICS), Ponts Paristech

arxiv:1902.04813 v1 · 2019-02-13 · 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{XGG4U3EHWSS7VNNYW36QYAZMMN}

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	2026-05-17T23:54:05.842749Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b98dca6c87b4a5fab5b8b6fd0c032c635423394c8653f6b15b7f7885a235d528

Aliases

arxiv: 1902.04813 · arxiv_version: 1902.04813v1 · doi: 10.48550/arxiv.1902.04813 · pith_short_12: XGG4U3EHWSS7 · pith_short_16: XGG4U3EHWSS7VNNY · pith_short_8: XGG4U3EH

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/XGG4U3EHWSS7VNNYW36QYAZMMN \
  | 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: b98dca6c87b4a5fab5b8b6fd0c032c635423394c8653f6b15b7f7885a235d528

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a51bbffa834622a529fa9f61f1bd19ae62f3c60bce26fd8cd30938ecaaf3b317",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-02-13T09:46:52Z",
    "title_canon_sha256": "2f8441c5333388f988260bc996e8f69facb743257a13888940aa81816adbe480"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.04813",
    "kind": "arxiv",
    "version": 1
  }
}