Pith Number

pith:NJUWQQUY

pith:2025:NJUWQQUYETUMF6BQPBLEYIR5SR

not attested not anchored not stored refs pending

On Squared-Variable Formulations for Nonlinear Semidefinite programming

Lijun Ding, Stephen J. Wright

arxiv:2502.02099 v1 · 2025-02-04 · 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{NJUWQQUYETUMF6BQPBLEYIR5SR}

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	2026-07-05T10:09:23.726089Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a6968429824e8c2f83078564c223d94410b35a63f562543bcf5e35aa436b9f5

Aliases

arxiv: 2502.02099 · arxiv_version: 2502.02099v1 · doi: 10.48550/arxiv.2502.02099 · pith_short_12: NJUWQQUYETUM · pith_short_16: NJUWQQUYETUMF6BQ · pith_short_8: NJUWQQUY

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/NJUWQQUYETUMF6BQPBLEYIR5SR \
  | 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: 6a6968429824e8c2f83078564c223d94410b35a63f562543bcf5e35aa436b9f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ea470757e00b8b8f1eff77f5f18a75e809f97bf5e570d4b365632d2d1b0b166",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2025-02-04T08:30:34Z",
    "title_canon_sha256": "281fc75732f7e7f56d9b7018e300bcd84b926942911169a6347c6a80588ab5b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.02099",
    "kind": "arxiv",
    "version": 1
  }
}