Pith Number

pith:NS2EBFGL

pith:2024:NS2EBFGL2I6P5ZZKH5L42D6VBV

not attested not anchored not stored refs pending

Uniqueness of size-2 positive semidefinite matrix factorizations

Kaie Kubjas, Kristen Dawson, Lilja Mets\"alampi, Serkan Ho\c{s}ten

arxiv:2410.18891 v1 · 2024-10-24 · math.MG · 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{NS2EBFGL2I6P5ZZKH5L42D6VBV}

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	2026-07-05T09:25:21.585367Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6cb44094cbd23cfee72a3f57cd0fd50d7a4a479e60a8ddfa20c0f536ef29d9f9

Aliases

arxiv: 2410.18891 · arxiv_version: 2410.18891v1 · doi: 10.48550/arxiv.2410.18891 · pith_short_12: NS2EBFGL2I6P · pith_short_16: NS2EBFGL2I6P5ZZK · pith_short_8: NS2EBFGL

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/NS2EBFGL2I6P5ZZKH5L42D6VBV \
  | 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: 6cb44094cbd23cfee72a3f57cd0fd50d7a4a479e60a8ddfa20c0f536ef29d9f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "60b6e5cebdf58f1c68682c45e887dac305259686f38b9f42ce7453b4303e3e6c",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2024-10-24T16:28:56Z",
    "title_canon_sha256": "cc126329149981cd983f582e329af70b8fad63b0de04ca92fc48c60c1afc7320"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2410.18891",
    "kind": "arxiv",
    "version": 1
  }
}