Pith Number

pith:KQLSQFWD

pith:2026:KQLSQFWDV3RV3E4RKNL7UKUBVQ

not attested not anchored not stored refs pending

Component-wise accurate computation of the square root of an M-matrix

Beatrice Meini, Bruno Iannazzo, Dario A. Bini, Jie Meng

arxiv:2605.21679 v1 · 2026-05-20 · math.NA · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KQLSQFWDV3RV3E4RKNL7UKUBVQ}

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	2026-05-22T01:03:27.855897Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54172816c3aee35d93915357fa2a81ac03a0334d4e94317d83ac7a16b8d705ad

Aliases

arxiv: 2605.21679 · arxiv_version: 2605.21679v1 · doi: 10.48550/arxiv.2605.21679 · pith_short_12: KQLSQFWDV3RV · pith_short_16: KQLSQFWDV3RV3E4R · pith_short_8: KQLSQFWD

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/KQLSQFWDV3RV3E4RKNL7UKUBVQ \
  | 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: 54172816c3aee35d93915357fa2a81ac03a0334d4e94317d83ac7a16b8d705ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba8f26d9289f825aa3dc35c4cb05cc02521182eef3ae465f41a58de5d1307629",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-20T19:37:31Z",
    "title_canon_sha256": "0e06e774ec8e9d7431937373a441e14230f2e44f768a0110d6c12c1073a13500"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.21679",
    "kind": "arxiv",
    "version": 1
  }
}