Pith Number

pith:VHMS53JW

pith:2025:VHMS53JWYEBS7PLFILDTD5TGIC

not attested not anchored not stored refs pending

Factorization-free Orthogonal Projection onto the Positive Semidefinite Cone with Composite Polynomial Filtering

Antoine Groudiev, Haoyu Han, Heng Yang, Shucheng Kang

arxiv:2507.09165 v2 · 2025-07-12 · 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{VHMS53JWYEBS7PLFILDTD5TGIC}

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	2026-06-29T00:14:00.053758Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9d92eed36c1032fbd6542c731f666408ec568679528158a7c78d5bafd4cbcab

Aliases

arxiv: 2507.09165 · arxiv_version: 2507.09165v2 · doi: 10.48550/arxiv.2507.09165 · pith_short_12: VHMS53JWYEBS · pith_short_16: VHMS53JWYEBS7PLF · pith_short_8: VHMS53JW

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/VHMS53JWYEBS7PLFILDTD5TGIC \
  | 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: a9d92eed36c1032fbd6542c731f666408ec568679528158a7c78d5bafd4cbcab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8db834b113926aa8764bebbc41961edb88f9c544efd2a4e131b3d2da165ab320",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2025-07-12T07:00:41Z",
    "title_canon_sha256": "d505cbcf1d561575dbd0745415a507e29705e2c184e01bdcb08e005bea23c479"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.09165",
    "kind": "arxiv",
    "version": 2
  }
}