Pith Number

pith:4WHPRVWL

pith:2026:4WHPRVWLAWRKM43P5ZFEFOGADT

not attested not anchored not stored refs pending

Incremental SVD for Large-Scale Dynamic Matrices: Accuracy, Subspace Stability, Refresh Strategies, and Financial Factor-Based Risk Models

Stilyan Staykov

arxiv:2605.24514 v1 · 2026-05-23 · math.NA · cs.NA · q-fin.RM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4WHPRVWLAWRKM43P5ZFEFOGADT}

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	2026-05-26T01:03:43.808511Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e58ef8d6cb05a2a6736fee4a42b8c01cd90467178b3c477ffbfcfee1c61f9585

Aliases

arxiv: 2605.24514 · arxiv_version: 2605.24514v1 · doi: 10.48550/arxiv.2605.24514 · pith_short_12: 4WHPRVWLAWRK · pith_short_16: 4WHPRVWLAWRKM43P · pith_short_8: 4WHPRVWL

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/4WHPRVWLAWRKM43P5ZFEFOGADT \
  | 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: e58ef8d6cb05a2a6736fee4a42b8c01cd90467178b3c477ffbfcfee1c61f9585

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e1bfadf895c710f3b8d6b95fc8681e40e278efdc65c3cd5830adaacc1bc7e8d",
    "cross_cats_sorted": [
      "cs.NA",
      "q-fin.RM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-23T10:56:31Z",
    "title_canon_sha256": "8c7d189299a9670053aaabf3bb6ae1ae60af17fab1223601d8d4f2ee5de71663"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.24514",
    "kind": "arxiv",
    "version": 1
  }
}