Pith Number

pith:7XJTIJZI

pith:2018:7XJTIJZILVOD432J44DOTIPUE2

not attested not anchored not stored refs pending

Arnoldi decomposition, GMRES, and preconditioning for linear discrete ill-posed problems

Lothar Reichel, Paolo Novati, Silvia Gazzola, Silvia Noschese

arxiv:1806.06599 v1 · 2018-06-18 · math.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{7XJTIJZILVOD432J44DOTIPUE2}

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	2026-05-18T00:13:01.883158Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fdd33427285d5c3e6f49e706e9a1f426af70e3f50c4d60f047ad5f344a1fed83

Aliases

arxiv: 1806.06599 · arxiv_version: 1806.06599v1 · doi: 10.48550/arxiv.1806.06599 · pith_short_12: 7XJTIJZILVOD · pith_short_16: 7XJTIJZILVOD432J · pith_short_8: 7XJTIJZI

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/7XJTIJZILVOD432J44DOTIPUE2 \
  | 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: fdd33427285d5c3e6f49e706e9a1f426af70e3f50c4d60f047ad5f344a1fed83

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec169c86d8394c43359afe150b4d46d0a0d521f6d52c981afd8228deb27407f7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-06-18T11:12:55Z",
    "title_canon_sha256": "a0f456ec3bcab64d93391a56fb5d7d2235c0b4080d43d2b0c9c5afbe1a24f1b5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.06599",
    "kind": "arxiv",
    "version": 1
  }
}