Pith Number

pith:H256QC4S

pith:2025:H256QC4ST5NXGS2CW4BIULRODZ

not attested not anchored not stored refs pending

Perturbed Gradient Descent via Convex Quadratic Approximation for Nonconvex Bilevel Optimization

Erfan Yazdandoost Hamedani, Mahyar Fazlyab, Nazanin Abolfazli, Sina Sharifi

arxiv:2504.17215 v1 · 2025-04-24 · 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{H256QC4ST5NXGS2CW4BIULRODZ}

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	2026-07-05T10:53:24.366204Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ebbe80b929f5b734b42b7028a2e2e1e5e3f0671e20daadcb050a4e23adbb329

Aliases

arxiv: 2504.17215 · arxiv_version: 2504.17215v1 · doi: 10.48550/arxiv.2504.17215 · pith_short_12: H256QC4ST5NX · pith_short_16: H256QC4ST5NXGS2C · pith_short_8: H256QC4S

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/H256QC4ST5NXGS2CW4BIULRODZ \
  | 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: 3ebbe80b929f5b734b42b7028a2e2e1e5e3f0671e20daadcb050a4e23adbb329

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d344f3a48e8fb6a7e9fbbb48960e6f4400b8faedf1883f06daec398b2eaf0287",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2025-04-24T03:07:23Z",
    "title_canon_sha256": "a2b290623a4243ed897ed0fac5ea101fbf0c5e50988491a46f82be9092bba109"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.17215",
    "kind": "arxiv",
    "version": 1
  }
}