Pith Number

pith:GEULRN5U

pith:2019:GEULRN5UPEQ7EV3LHEMUQZSNB5

not attested not anchored not stored refs pending

Several classes of stationary points for rank regularized minimization problems

Shaohua Pan, Yulan Liu

arxiv:1906.08922 v2 · 2019-06-21 · 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{GEULRN5UPEQ7EV3LHEMUQZSNB5}

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	2026-05-17T23:42:13.311493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3128b8b7b47921f2576b391948664d0f5f305300c170fd4a4b55dd37825bcb41

Aliases

arxiv: 1906.08922 · arxiv_version: 1906.08922v2 · doi: 10.48550/arxiv.1906.08922 · pith_short_12: GEULRN5UPEQ7 · pith_short_16: GEULRN5UPEQ7EV3L · pith_short_8: GEULRN5U

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/GEULRN5UPEQ7EV3LHEMUQZSNB5 \
  | 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: 3128b8b7b47921f2576b391948664d0f5f305300c170fd4a4b55dd37825bcb41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c42b8ad9707df0e7361ed6dd400df73130446e9fcd81243a2c943ac327b43ad1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-06-21T02:32:21Z",
    "title_canon_sha256": "e863a12a6107a36bad5aefcc925de219dc466e750c3f4feca9281f7d22194a77"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.08922",
    "kind": "arxiv",
    "version": 2
  }
}