Pith Number

pith:TSZZP2U6

pith:2026:TSZZP2U6DADLKRVJVKXO7AZLOB

not attested not anchored not stored refs pending

Benign Landscape of Quadratic Programs with Orthogonality Constraints and Its Application to Heteroscedastic Probabilistic PCA

Laura Balzano, Peng Wang, Po Chen, Rujun Jiang

arxiv:2606.27189 v1 · 2026-06-25 · 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{TSZZP2U6DADLKRVJVKXO7AZLOB}

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	2026-06-26T01:16:13.079861Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9cb397ea9e1806b546a9aaaeef832b7051f88786bbaee3adf601b40d4dd1fc09

Aliases

arxiv: 2606.27189 · arxiv_version: 2606.27189v1 · doi: 10.48550/arxiv.2606.27189 · pith_short_12: TSZZP2U6DADL · pith_short_16: TSZZP2U6DADLKRVJ · pith_short_8: TSZZP2U6

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/TSZZP2U6DADLKRVJVKXO7AZLOB \
  | 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: 9cb397ea9e1806b546a9aaaeef832b7051f88786bbaee3adf601b40d4dd1fc09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4fab8efa0ad82739785247da1ba5dd37297a8cbcce960492e784627a0f3e1dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2026-06-25T15:51:09Z",
    "title_canon_sha256": "07f34f1ad9b324665a9860845bb7d23016dc2fcdfcc7fdc24b6c7465e14434a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.27189",
    "kind": "arxiv",
    "version": 1
  }
}