Pith Number

pith:27GMZLFA

pith:2017:27GMZLFA65W2HJDLVKP4DWV56U

not attested not anchored not stored refs pending

Recovering Sparse Nonnegative Signals via Non-convex Fraction Function Penalty

Angang Cui, Haiyang Li, Jigen Peng, Meng Wen

arxiv:1707.06576 v2 · 2017-07-20 · 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{27GMZLFA65W2HJDLVKP4DWV56U}

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	2026-05-18T00:36:38.217142Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7ccccaca0f76da3a46baa9fc1dabdf50d1a036d119b6ea6333560d411199a27

Aliases

arxiv: 1707.06576 · arxiv_version: 1707.06576v2 · doi: 10.48550/arxiv.1707.06576 · pith_short_12: 27GMZLFA65W2 · pith_short_16: 27GMZLFA65W2HJDL · pith_short_8: 27GMZLFA

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/27GMZLFA65W2HJDLVKP4DWV56U \
  | 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: d7ccccaca0f76da3a46baa9fc1dabdf50d1a036d119b6ea6333560d411199a27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f28c27024256497d80a2c04cd3ddd6d1949ab3eea586e5dcf96bba86ab071bb2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-07-20T15:38:13Z",
    "title_canon_sha256": "a6173a5f04b6395f1bcd565c82fac89da1f9837d216b62b7b73798fedad70c91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.06576",
    "kind": "arxiv",
    "version": 2
  }
}