Pith Number

pith:ISGS6VQB

pith:2021:ISGS6VQBB4ITCJ6EPKNO5Q2CKD

not attested not anchored not stored refs pending

A Dimension Reduction Technique for Large-scale Structured Sparse Optimization Problems with Application to Convex Clustering

Defeng Sun, Kim-Chuan Toh, Tsung-Hui Chang, Yancheng Yuan

arxiv:2108.07462 v1 · 2021-08-17 · 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{ISGS6VQBB4ITCJ6EPKNO5Q2CKD}

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	2026-07-05T03:06:39.158749Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

448d2f56010f113127c47a9aeec34250cc98ae59bfb9ec393b530cc095583d9c

Aliases

arxiv: 2108.07462 · arxiv_version: 2108.07462v1 · doi: 10.48550/arxiv.2108.07462 · pith_short_12: ISGS6VQBB4IT · pith_short_16: ISGS6VQBB4ITCJ6E · pith_short_8: ISGS6VQB

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/ISGS6VQBB4ITCJ6EPKNO5Q2CKD \
  | 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: 448d2f56010f113127c47a9aeec34250cc98ae59bfb9ec393b530cc095583d9c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e99e1231fa02bc107396e3bfc91b74400181944f541f21d889e0200799968eea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2021-08-17T06:36:20Z",
    "title_canon_sha256": "e2343ab4c440116b545a773ecdfcbad6972b07b68f5aef6907ea335668126a17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.07462",
    "kind": "arxiv",
    "version": 1
  }
}