Pith Number

pith:IFKR25JL

pith:2026:IFKR25JLKXVY6P6ECMAFOAOYCQ

not attested not anchored not stored refs pending

Factorized Krylov subspace methods for solving large Sylvester equations

Shao-Liang Zhang, Takeshi Fukaya, Tomohiro Sogabe, Yuki Satake

arxiv:2605.28274 v1 · 2026-05-27 · 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{IFKR25JLKXVY6P6ECMAFOAOYCQ}

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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	2026-05-28T01:05:04.854710Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41551d752b55eb8f3fc413005701d8142fac7cf1039971a9acc8881748dfc7bc

Aliases

arxiv: 2605.28274 · arxiv_version: 2605.28274v1 · doi: 10.48550/arxiv.2605.28274 · pith_short_12: IFKR25JLKXVY · pith_short_16: IFKR25JLKXVY6P6E · pith_short_8: IFKR25JL

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/IFKR25JLKXVY6P6ECMAFOAOYCQ \
  | 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: 41551d752b55eb8f3fc413005701d8142fac7cf1039971a9acc8881748dfc7bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "41e48580a51a887e8fce8a78430e394aad676de8c4f4cebe3c3ab48e02a461ea",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-27T10:19:52Z",
    "title_canon_sha256": "ab48924585cdeb0b42014c5d38028db9ed3bd1ee4050f31bf0f6cf4d2c965637"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.28274",
    "kind": "arxiv",
    "version": 1
  }
}